/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:17:53,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:17:53,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:17:53,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:17:53,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:17:53,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:17:53,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:17:53,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:17:53,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:17:53,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:17:53,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:17:53,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:17:53,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:17:53,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:17:53,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:17:53,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:17:53,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:17:53,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:17:53,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:17:53,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:17:53,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:17:53,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:17:53,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:17:53,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:17:53,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:17:53,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:17:53,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:17:53,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:17:53,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:17:53,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:17:53,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:17:53,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:17:53,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:17:53,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:17:53,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:17:53,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:17:53,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:17:53,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:17:53,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:17:53,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:17:53,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:17:53,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 10:17:53,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:17:53,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:17:53,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:17:53,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:17:53,203 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:17:53,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:17:53,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:17:53,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:17:53,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:17:53,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:17:53,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:17:53,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:17:53,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:17:53,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:17:53,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:17:53,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:17:53,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:17:53,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:17:53,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:17:53,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:17:53,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:17:53,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:17:53,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:17:53,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:17:53,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:17:53,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:17:53,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:17:53,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:17:53,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:17:53,209 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:17:53,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:17:53,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:17:53,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:17:53,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:17:53,783 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:17:53,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 10:17:53,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46983b287/5bb5b9db1cb94595894821fc72411c5c/FLAG7ed50ff3a [2020-09-25 10:17:54,414 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:17:54,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 10:17:54,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46983b287/5bb5b9db1cb94595894821fc72411c5c/FLAG7ed50ff3a [2020-09-25 10:17:54,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46983b287/5bb5b9db1cb94595894821fc72411c5c [2020-09-25 10:17:54,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:17:54,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:17:54,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:17:54,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:17:54,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:17:54,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:17:54" (1/1) ... [2020-09-25 10:17:54,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b8db4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:54, skipping insertion in model container [2020-09-25 10:17:54,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:17:54" (1/1) ... [2020-09-25 10:17:54,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:17:54,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:17:55,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:17:55,084 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:17:55,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:17:55,127 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:17:55,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55 WrapperNode [2020-09-25 10:17:55,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:17:55,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:17:55,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:17:55,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:17:55,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... [2020-09-25 10:17:55,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... [2020-09-25 10:17:55,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... [2020-09-25 10:17:55,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... [2020-09-25 10:17:55,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... [2020-09-25 10:17:55,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... [2020-09-25 10:17:55,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... [2020-09-25 10:17:55,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:17:55,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:17:55,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:17:55,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:17:55,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:17:55,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:17:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:17:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 10:17:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 10:17:55,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:17:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:17:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 10:17:55,318 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 10:17:55,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 10:17:55,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:17:55,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:17:55,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:17:55,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:17:55,706 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:17:55,707 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 10:17:55,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:17:55 BoogieIcfgContainer [2020-09-25 10:17:55,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:17:55,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:17:55,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:17:55,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:17:55,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:17:54" (1/3) ... [2020-09-25 10:17:55,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bceee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:17:55, skipping insertion in model container [2020-09-25 10:17:55,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:17:55" (2/3) ... [2020-09-25 10:17:55,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bceee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:17:55, skipping insertion in model container [2020-09-25 10:17:55,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:17:55" (3/3) ... [2020-09-25 10:17:55,722 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-09-25 10:17:55,733 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:17:55,744 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:17:55,766 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:17:55,798 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:17:55,798 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:17:55,798 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:17:55,798 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:17:55,799 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:17:55,799 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:17:55,799 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:17:55,799 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:17:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-25 10:17:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 10:17:55,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:55,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:55,831 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash 288343897, now seen corresponding path program 1 times [2020-09-25 10:17:55,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:55,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325663270] [2020-09-25 10:17:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:55,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:56,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:56,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 10:17:56,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:56,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-25 10:17:56,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:56,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:56,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 10:17:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:56,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:17:56,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:56,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:56,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:56,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:17:56,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:56,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 10:17:56,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:56,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:56,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:17:56,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325663270] [2020-09-25 10:17:56,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:17:56,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 10:17:56,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952504798] [2020-09-25 10:17:56,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 10:17:56,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 10:17:56,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 10:17:56,142 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-09-25 10:17:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:56,180 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-09-25 10:17:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 10:17:56,182 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-09-25 10:17:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:56,200 INFO L225 Difference]: With dead ends: 75 [2020-09-25 10:17:56,200 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 10:17:56,205 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 [2020-09-25 10:17:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 10:17:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-25 10:17:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 10:17:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-25 10:17:56,251 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2020-09-25 10:17:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:56,252 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-25 10:17:56,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 10:17:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-25 10:17:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 10:17:56,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:56,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:56,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:17:56,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:56,258 INFO L82 PathProgramCache]: Analyzing trace with hash 320540924, now seen corresponding path program 1 times [2020-09-25 10:17:56,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:56,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369116618] [2020-09-25 10:17:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:56,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:56,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:56,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 10:17:56,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:56,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-09-25 10:17:56,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:56,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:17:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 10:17:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 10:17:56,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:17:56,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:56,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:56,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:17:56,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:56,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:17:56,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:56,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:56,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:56,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:17:56,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369116618] [2020-09-25 10:17:56,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:17:56,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:17:56,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66991781] [2020-09-25 10:17:56,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:17:56,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:17:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:17:56,605 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-09-25 10:17:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:56,694 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-09-25 10:17:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:17:56,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 10:17:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:56,696 INFO L225 Difference]: With dead ends: 67 [2020-09-25 10:17:56,696 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 10:17:56,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:17:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 10:17:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-25 10:17:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 10:17:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-25 10:17:56,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2020-09-25 10:17:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:56,708 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-25 10:17:56,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:17:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-25 10:17:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 10:17:56,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:56,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:56,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:17:56,711 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:56,713 INFO L82 PathProgramCache]: Analyzing trace with hash 751787059, now seen corresponding path program 1 times [2020-09-25 10:17:56,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:56,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099263971] [2020-09-25 10:17:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:56,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:56,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:56,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 10:17:56,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:56,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-09-25 10:17:56,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:56,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:56,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:17:56,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:17:56,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 10:17:56,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 10:17:57,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:57,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:57,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:17:57,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:17:57,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:57,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:17:57,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099263971] [2020-09-25 10:17:57,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:57,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 10:17:57,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52305831] [2020-09-25 10:17:57,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 10:17:57,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:57,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 10:17:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:17:57,068 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states. [2020-09-25 10:17:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:57,224 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-25 10:17:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 10:17:57,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-25 10:17:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:57,226 INFO L225 Difference]: With dead ends: 88 [2020-09-25 10:17:57,226 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 10:17:57,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:17:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 10:17:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-09-25 10:17:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-25 10:17:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-25 10:17:57,239 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 37 [2020-09-25 10:17:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:57,240 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-25 10:17:57,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 10:17:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-25 10:17:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 10:17:57,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:57,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:57,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:17:57,242 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:57,243 INFO L82 PathProgramCache]: Analyzing trace with hash 3796503, now seen corresponding path program 1 times [2020-09-25 10:17:57,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:57,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644698526] [2020-09-25 10:17:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:57,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:57,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:57,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 10:17:57,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:57,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-09-25 10:17:57,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:57,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:17:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 10:17:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 10:17:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:57,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:57,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:17:57,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:57,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:17:57,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:57,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:17:57,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644698526] [2020-09-25 10:17:57,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:57,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 10:17:57,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018480205] [2020-09-25 10:17:57,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 10:17:57,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 10:17:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:17:57,512 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 7 states. [2020-09-25 10:17:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:57,630 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-09-25 10:17:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 10:17:57,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 10:17:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:57,634 INFO L225 Difference]: With dead ends: 105 [2020-09-25 10:17:57,634 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 10:17:57,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:17:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 10:17:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-09-25 10:17:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 10:17:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 10:17:57,647 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 38 [2020-09-25 10:17:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:57,648 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 10:17:57,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 10:17:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 10:17:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 10:17:57,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:57,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:57,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:17:57,650 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash 197728887, now seen corresponding path program 1 times [2020-09-25 10:17:57,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:57,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522424048] [2020-09-25 10:17:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:57,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:57,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 10:17:57,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:57,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-25 10:17:57,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:57,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:17:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:17:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 10:17:57,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:57,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:57,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:57,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:17:57,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:17:57,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:57,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:57,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:17:57,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522424048] [2020-09-25 10:17:57,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:57,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 10:17:57,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529890434] [2020-09-25 10:17:57,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 10:17:57,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 10:17:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:17:57,827 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-09-25 10:17:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:57,931 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-09-25 10:17:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 10:17:57,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 10:17:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:57,933 INFO L225 Difference]: With dead ends: 116 [2020-09-25 10:17:57,933 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 10:17:57,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:17:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 10:17:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-09-25 10:17:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-25 10:17:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-09-25 10:17:57,946 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 38 [2020-09-25 10:17:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:57,947 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-09-25 10:17:57,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 10:17:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-09-25 10:17:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 10:17:57,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:57,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:57,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:17:57,950 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:57,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:57,951 INFO L82 PathProgramCache]: Analyzing trace with hash 88652198, now seen corresponding path program 1 times [2020-09-25 10:17:57,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:57,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569517981] [2020-09-25 10:17:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:57,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:59,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:59,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 10:17:59,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:17:59,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-09-25 10:17:59,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:59,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:17:59,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:17:59,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 10:17:59,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:17:59,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:59,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:59,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:17:59,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:17:59,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:59,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:59,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:59,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:17:59,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 10:17:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:59,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:59,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:59,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:17:59,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:59,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 10:17:59,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:59,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:59,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:17:59,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:59,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:17:59,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:17:59,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569517981] [2020-09-25 10:17:59,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:59,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:17:59,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730031966] [2020-09-25 10:17:59,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:17:59,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:17:59,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:17:59,198 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 9 states. [2020-09-25 10:17:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:59,394 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-25 10:17:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 10:17:59,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 10:17:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:59,396 INFO L225 Difference]: With dead ends: 129 [2020-09-25 10:17:59,396 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 10:17:59,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:17:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 10:17:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2020-09-25 10:17:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 10:17:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-25 10:17:59,423 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 49 [2020-09-25 10:17:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:59,423 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-25 10:17:59,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:17:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-25 10:17:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 10:17:59,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:59,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:59,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:17:59,428 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1084443264, now seen corresponding path program 1 times [2020-09-25 10:17:59,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:59,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390440618] [2020-09-25 10:17:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:59,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:59,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:59,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:00,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:00,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 10:18:00,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-09-25 10:18:00,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:00,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:00,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:00,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:00,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:18:00,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:00,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:00,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:00,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:00,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:00,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:18:00,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:00,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:00,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:00,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390440618] [2020-09-25 10:18:00,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:00,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:00,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388488539] [2020-09-25 10:18:00,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:00,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:00,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:00,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:00,204 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 9 states. [2020-09-25 10:18:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:00,469 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2020-09-25 10:18:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 10:18:00,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 10:18:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:00,475 INFO L225 Difference]: With dead ends: 164 [2020-09-25 10:18:00,475 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 10:18:00,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:18:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 10:18:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-09-25 10:18:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-25 10:18:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-25 10:18:00,506 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 48 [2020-09-25 10:18:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:00,506 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-25 10:18:00,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-25 10:18:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 10:18:00,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:00,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:00,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 10:18:00,509 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1278375648, now seen corresponding path program 1 times [2020-09-25 10:18:00,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:00,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117142258] [2020-09-25 10:18:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:00,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:01,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:01,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 10:18:01,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:01,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-09-25 10:18:01,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:01,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:01,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:18:01,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:01,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:01,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:01,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:01,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:01,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:01,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:01,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:01,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:01,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:01,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:18:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:01,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117142258] [2020-09-25 10:18:01,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:01,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:01,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603258765] [2020-09-25 10:18:01,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:01,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:01,205 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 9 states. [2020-09-25 10:18:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:01,452 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-09-25 10:18:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 10:18:01,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 10:18:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:01,454 INFO L225 Difference]: With dead ends: 185 [2020-09-25 10:18:01,454 INFO L226 Difference]: Without dead ends: 183 [2020-09-25 10:18:01,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:18:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-25 10:18:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-25 10:18:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-25 10:18:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2020-09-25 10:18:01,486 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 48 [2020-09-25 10:18:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:01,487 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2020-09-25 10:18:01,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2020-09-25 10:18:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 10:18:01,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:01,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:01,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 10:18:01,491 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:01,492 INFO L82 PathProgramCache]: Analyzing trace with hash -287517810, now seen corresponding path program 2 times [2020-09-25 10:18:01,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:01,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744270386] [2020-09-25 10:18:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:01,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:01,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:02,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:02,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 10:18:02,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:02,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-09-25 10:18:02,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:02,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:18:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:02,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:02,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:02,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:02,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:02,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:02,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:18:02,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:02,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:02,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:02,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744270386] [2020-09-25 10:18:02,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:02,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:02,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115151892] [2020-09-25 10:18:02,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:02,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:02,136 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand 9 states. [2020-09-25 10:18:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:02,315 INFO L93 Difference]: Finished difference Result 227 states and 262 transitions. [2020-09-25 10:18:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 10:18:02,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 10:18:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:02,318 INFO L225 Difference]: With dead ends: 227 [2020-09-25 10:18:02,318 INFO L226 Difference]: Without dead ends: 225 [2020-09-25 10:18:02,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:18:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-25 10:18:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 184. [2020-09-25 10:18:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 10:18:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-09-25 10:18:02,329 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 48 [2020-09-25 10:18:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:02,330 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-09-25 10:18:02,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-09-25 10:18:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 10:18:02,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:02,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:02,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 10:18:02,332 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash 942147566, now seen corresponding path program 2 times [2020-09-25 10:18:02,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:02,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141186366] [2020-09-25 10:18:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:02,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:02,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:02,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:02,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:02,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 10:18:02,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:02,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-09-25 10:18:02,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:02,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:02,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:02,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:18:02,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:02,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:02,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:02,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:02,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:03,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:03,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:03,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:03,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141186366] [2020-09-25 10:18:03,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:03,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:03,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613287803] [2020-09-25 10:18:03,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:03,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:03,008 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 9 states. [2020-09-25 10:18:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:03,182 INFO L93 Difference]: Finished difference Result 257 states and 299 transitions. [2020-09-25 10:18:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 10:18:03,182 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 10:18:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:03,184 INFO L225 Difference]: With dead ends: 257 [2020-09-25 10:18:03,184 INFO L226 Difference]: Without dead ends: 255 [2020-09-25 10:18:03,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:18:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-25 10:18:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 215. [2020-09-25 10:18:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 10:18:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 10:18:03,196 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 48 [2020-09-25 10:18:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:03,197 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 10:18:03,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 10:18:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 10:18:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:03,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:03,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 10:18:03,198 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1391225462, now seen corresponding path program 1 times [2020-09-25 10:18:03,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:03,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596730954] [2020-09-25 10:18:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:03,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:03,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:04,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:04,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 10:18:04,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:04,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-09-25 10:18:04,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:04,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 10:18:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 10:18:04,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:04,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:04,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:04,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:04,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:04,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:18:04,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:04,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:04,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:04,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:04,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:04,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:04,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 10:18:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:04,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:04,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:04,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:04,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:04,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:18:04,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:04,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:04,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596730954] [2020-09-25 10:18:04,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:04,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:04,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608554275] [2020-09-25 10:18:04,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:04,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:04,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:04,184 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 10:18:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:04,408 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2020-09-25 10:18:04,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 10:18:04,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 10:18:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:04,411 INFO L225 Difference]: With dead ends: 245 [2020-09-25 10:18:04,412 INFO L226 Difference]: Without dead ends: 243 [2020-09-25 10:18:04,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:18:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-25 10:18:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-09-25 10:18:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 10:18:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 10:18:04,425 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 50 [2020-09-25 10:18:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:04,427 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 10:18:04,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 10:18:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 10:18:04,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:04,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:04,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 10:18:04,430 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:04,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1955950980, now seen corresponding path program 1 times [2020-09-25 10:18:04,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:04,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204085775] [2020-09-25 10:18:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:04,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:04,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:04,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:04,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:04,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 10:18:04,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:04,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-09-25 10:18:04,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:04,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:18:04,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:18:04,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:05,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:05,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:05,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:05,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:05,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:05,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:05,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:05,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:05,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204085775] [2020-09-25 10:18:05,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:05,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:05,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249256916] [2020-09-25 10:18:05,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:05,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:05,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:05,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:05,048 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 10:18:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:05,225 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2020-09-25 10:18:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 10:18:05,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 10:18:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:05,228 INFO L225 Difference]: With dead ends: 286 [2020-09-25 10:18:05,228 INFO L226 Difference]: Without dead ends: 284 [2020-09-25 10:18:05,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:18:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-25 10:18:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2020-09-25 10:18:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-25 10:18:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2020-09-25 10:18:05,246 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 49 [2020-09-25 10:18:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:05,247 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2020-09-25 10:18:05,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2020-09-25 10:18:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 10:18:05,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:05,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:05,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 10:18:05,248 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash -798805526, now seen corresponding path program 1 times [2020-09-25 10:18:05,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:05,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383057494] [2020-09-25 10:18:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:05,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:05,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:05,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:06,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:06,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 10:18:06,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-09-25 10:18:06,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:06,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:18:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 10:18:06,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:06,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:06,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:06,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:06,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:06,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:06,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:06,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:06,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 10:18:06,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 10:18:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:06,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:06,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:06,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:06,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:06,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:18:06,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:06,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:06,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:06,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:06,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:06,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:06,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383057494] [2020-09-25 10:18:06,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:06,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:06,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112065070] [2020-09-25 10:18:06,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:06,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:06,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:06,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:06,198 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand 9 states. [2020-09-25 10:18:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:06,364 INFO L93 Difference]: Finished difference Result 268 states and 313 transitions. [2020-09-25 10:18:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 10:18:06,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 10:18:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:06,367 INFO L225 Difference]: With dead ends: 268 [2020-09-25 10:18:06,367 INFO L226 Difference]: Without dead ends: 266 [2020-09-25 10:18:06,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:18:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-25 10:18:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 238. [2020-09-25 10:18:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-09-25 10:18:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 283 transitions. [2020-09-25 10:18:06,387 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 283 transitions. Word has length 50 [2020-09-25 10:18:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:06,387 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 283 transitions. [2020-09-25 10:18:06,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 283 transitions. [2020-09-25 10:18:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 10:18:06,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:06,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:06,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 10:18:06,389 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004924, now seen corresponding path program 2 times [2020-09-25 10:18:06,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:06,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563076520] [2020-09-25 10:18:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:06,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:06,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:06,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:06,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:06,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 10:18:06,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:06,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-09-25 10:18:06,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:06,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:06,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:18:06,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:18:06,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:06,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:06,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:06,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:06,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:06,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:06,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:06,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:06,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:06,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:06,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563076520] [2020-09-25 10:18:06,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:06,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:06,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455474138] [2020-09-25 10:18:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:06,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:06,988 INFO L87 Difference]: Start difference. First operand 238 states and 283 transitions. Second operand 9 states. [2020-09-25 10:18:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:07,203 INFO L93 Difference]: Finished difference Result 302 states and 354 transitions. [2020-09-25 10:18:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 10:18:07,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 10:18:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:07,206 INFO L225 Difference]: With dead ends: 302 [2020-09-25 10:18:07,206 INFO L226 Difference]: Without dead ends: 300 [2020-09-25 10:18:07,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:18:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-25 10:18:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 260. [2020-09-25 10:18:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-25 10:18:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 311 transitions. [2020-09-25 10:18:07,224 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 311 transitions. Word has length 49 [2020-09-25 10:18:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:07,225 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 311 transitions. [2020-09-25 10:18:07,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 311 transitions. [2020-09-25 10:18:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 10:18:07,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:07,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:07,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 10:18:07,227 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:07,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1367702887, now seen corresponding path program 2 times [2020-09-25 10:18:07,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:07,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336206544] [2020-09-25 10:18:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:07,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:07,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:07,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:07,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:07,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:09,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:09,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 10:18:09,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:18:09,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2067 [2020-09-25 10:18:09,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:09,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:09,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:09,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:09,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 10:18:09,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:09,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:09,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:09,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:09,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:09,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:09,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:09,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:09,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:09,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 10:18:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:09,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:09,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:09,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:09,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:18:09,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:09,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:09,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:09,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:09,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:09,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:09,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 10:18:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:09,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:09,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:09,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:09,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:09,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:18:09,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:09,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:09,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:09,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:09,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:09,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 10:18:09,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336206544] [2020-09-25 10:18:09,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:09,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:09,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776883214] [2020-09-25 10:18:09,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:09,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:09,429 INFO L87 Difference]: Start difference. First operand 260 states and 311 transitions. Second operand 11 states. [2020-09-25 10:18:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:09,702 INFO L93 Difference]: Finished difference Result 301 states and 352 transitions. [2020-09-25 10:18:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:09,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-09-25 10:18:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:09,704 INFO L225 Difference]: With dead ends: 301 [2020-09-25 10:18:09,704 INFO L226 Difference]: Without dead ends: 299 [2020-09-25 10:18:09,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:18:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-25 10:18:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 273. [2020-09-25 10:18:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-09-25 10:18:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 324 transitions. [2020-09-25 10:18:09,722 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 324 transitions. Word has length 61 [2020-09-25 10:18:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:09,723 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 324 transitions. [2020-09-25 10:18:09,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 324 transitions. [2020-09-25 10:18:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 10:18:09,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:09,724 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:09,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 10:18:09,725 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2112840589, now seen corresponding path program 1 times [2020-09-25 10:18:09,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:09,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314412756] [2020-09-25 10:18:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:09,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:09,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:10,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:11,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:11,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 10:18:11,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:18:11,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1761 [2020-09-25 10:18:11,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:11,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:11,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:11,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:11,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 10:18:11,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:11,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:11,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:11,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:11,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:11,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 10:18:11,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:11,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:11,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:11,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:11,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 10:18:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:11,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:11,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:11,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:11,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:11,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:18:11,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:11,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:11,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:11,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314412756] [2020-09-25 10:18:11,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:11,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:11,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685578558] [2020-09-25 10:18:11,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:11,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:11,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:11,609 INFO L87 Difference]: Start difference. First operand 273 states and 324 transitions. Second operand 11 states. [2020-09-25 10:18:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:11,984 INFO L93 Difference]: Finished difference Result 315 states and 368 transitions. [2020-09-25 10:18:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:18:11,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 10:18:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:11,987 INFO L225 Difference]: With dead ends: 315 [2020-09-25 10:18:11,987 INFO L226 Difference]: Without dead ends: 313 [2020-09-25 10:18:11,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 10:18:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-25 10:18:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 273. [2020-09-25 10:18:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-09-25 10:18:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 324 transitions. [2020-09-25 10:18:12,005 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 324 transitions. Word has length 60 [2020-09-25 10:18:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:12,005 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 324 transitions. [2020-09-25 10:18:12,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 324 transitions. [2020-09-25 10:18:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:12,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:12,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:12,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 10:18:12,007 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash 320690707, now seen corresponding path program 3 times [2020-09-25 10:18:12,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:12,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754358855] [2020-09-25 10:18:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:12,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:12,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:12,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:12,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:13,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:13,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:13,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:13,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1884 [2020-09-25 10:18:13,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:13,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:18:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:14,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:14,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:14,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:14,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:14,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:14,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:14,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:14,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:14,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754358855] [2020-09-25 10:18:14,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:14,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:18:14,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440215974] [2020-09-25 10:18:14,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:18:14,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:18:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:18:14,031 INFO L87 Difference]: Start difference. First operand 273 states and 324 transitions. Second operand 10 states. [2020-09-25 10:18:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:14,409 INFO L93 Difference]: Finished difference Result 408 states and 479 transitions. [2020-09-25 10:18:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:18:14,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 10:18:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:14,412 INFO L225 Difference]: With dead ends: 408 [2020-09-25 10:18:14,412 INFO L226 Difference]: Without dead ends: 406 [2020-09-25 10:18:14,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:18:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-09-25 10:18:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 305. [2020-09-25 10:18:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-25 10:18:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 364 transitions. [2020-09-25 10:18:14,429 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 364 transitions. Word has length 59 [2020-09-25 10:18:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:14,429 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 364 transitions. [2020-09-25 10:18:14,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:18:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 364 transitions. [2020-09-25 10:18:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:14,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:14,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:14,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 10:18:14,431 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash 514623091, now seen corresponding path program 1 times [2020-09-25 10:18:14,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:14,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097793831] [2020-09-25 10:18:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:14,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:14,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:14,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:14,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:14,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:16,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:16,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:16,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:16,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-09-25 10:18:16,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:16,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:16,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:16,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:16,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:16,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:16,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:16,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:16,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:16,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:16,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:16,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:16,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:16,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:16,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:16,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097793831] [2020-09-25 10:18:16,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:16,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:16,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345988245] [2020-09-25 10:18:16,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:16,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:16,579 INFO L87 Difference]: Start difference. First operand 305 states and 364 transitions. Second operand 11 states. [2020-09-25 10:18:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:16,893 INFO L93 Difference]: Finished difference Result 428 states and 508 transitions. [2020-09-25 10:18:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:16,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 10:18:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:16,896 INFO L225 Difference]: With dead ends: 428 [2020-09-25 10:18:16,896 INFO L226 Difference]: Without dead ends: 426 [2020-09-25 10:18:16,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:18:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-09-25 10:18:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 339. [2020-09-25 10:18:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-09-25 10:18:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 407 transitions. [2020-09-25 10:18:16,914 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 407 transitions. Word has length 59 [2020-09-25 10:18:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:16,914 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 407 transitions. [2020-09-25 10:18:16,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 407 transitions. [2020-09-25 10:18:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 10:18:16,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:16,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:16,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 10:18:16,916 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1520420653, now seen corresponding path program 1 times [2020-09-25 10:18:16,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:16,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376603549] [2020-09-25 10:18:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:16,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:16,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:17,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:18,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:18,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 10:18:18,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:18:18,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-09-25 10:18:18,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:18,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:18,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:18,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 10:18:18,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:18,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:18,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:18,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:18,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:18,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:18,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:18,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:18,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:18,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:18,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 10:18:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:18,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:18,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:18,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:18,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:18,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:18:18,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:18,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:18,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376603549] [2020-09-25 10:18:18,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:18,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:18,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334699363] [2020-09-25 10:18:18,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:18,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:18,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:18,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:18,782 INFO L87 Difference]: Start difference. First operand 339 states and 407 transitions. Second operand 11 states. [2020-09-25 10:18:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:19,162 INFO L93 Difference]: Finished difference Result 401 states and 476 transitions. [2020-09-25 10:18:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:18:19,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 10:18:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:19,166 INFO L225 Difference]: With dead ends: 401 [2020-09-25 10:18:19,166 INFO L226 Difference]: Without dead ends: 399 [2020-09-25 10:18:19,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 10:18:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-09-25 10:18:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 360. [2020-09-25 10:18:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-09-25 10:18:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 433 transitions. [2020-09-25 10:18:19,185 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 433 transitions. Word has length 60 [2020-09-25 10:18:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:19,185 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 433 transitions. [2020-09-25 10:18:19,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 433 transitions. [2020-09-25 10:18:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:19,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:19,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:19,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 10:18:19,187 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:19,188 INFO L82 PathProgramCache]: Analyzing trace with hash -214388301, now seen corresponding path program 2 times [2020-09-25 10:18:19,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:19,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087501127] [2020-09-25 10:18:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:19,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:19,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:19,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:19,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:20,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:20,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:20,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:20,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-09-25 10:18:20,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:20,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:21,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:21,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:21,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:21,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:21,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:21,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:21,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:21,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:21,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:21,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:21,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087501127] [2020-09-25 10:18:21,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:21,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:21,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459400221] [2020-09-25 10:18:21,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:21,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:21,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:21,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:21,067 INFO L87 Difference]: Start difference. First operand 360 states and 433 transitions. Second operand 11 states. [2020-09-25 10:18:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:21,589 INFO L93 Difference]: Finished difference Result 522 states and 625 transitions. [2020-09-25 10:18:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:18:21,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 10:18:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:21,593 INFO L225 Difference]: With dead ends: 522 [2020-09-25 10:18:21,593 INFO L226 Difference]: Without dead ends: 520 [2020-09-25 10:18:21,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:18:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-09-25 10:18:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 445. [2020-09-25 10:18:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-09-25 10:18:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 539 transitions. [2020-09-25 10:18:21,632 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 539 transitions. Word has length 59 [2020-09-25 10:18:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:21,633 INFO L479 AbstractCegarLoop]: Abstraction has 445 states and 539 transitions. [2020-09-25 10:18:21,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 539 transitions. [2020-09-25 10:18:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:21,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:21,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:21,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 10:18:21,636 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:21,636 INFO L82 PathProgramCache]: Analyzing trace with hash -20455917, now seen corresponding path program 3 times [2020-09-25 10:18:21,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:21,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45549015] [2020-09-25 10:18:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:21,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:21,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:21,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:21,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:23,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:23,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:23,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:23,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-09-25 10:18:23,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:23,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:23,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:18:23,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:23,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:23,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:23,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:23,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:23,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:23,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:23,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:23,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:23,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:23,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:23,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45549015] [2020-09-25 10:18:23,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:23,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:18:23,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183383628] [2020-09-25 10:18:23,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:18:23,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:18:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:18:23,519 INFO L87 Difference]: Start difference. First operand 445 states and 539 transitions. Second operand 10 states. [2020-09-25 10:18:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:23,967 INFO L93 Difference]: Finished difference Result 582 states and 697 transitions. [2020-09-25 10:18:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:18:23,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 10:18:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:23,971 INFO L225 Difference]: With dead ends: 582 [2020-09-25 10:18:23,971 INFO L226 Difference]: Without dead ends: 580 [2020-09-25 10:18:23,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:18:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-09-25 10:18:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 478. [2020-09-25 10:18:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-25 10:18:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 581 transitions. [2020-09-25 10:18:23,995 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 581 transitions. Word has length 59 [2020-09-25 10:18:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:23,996 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 581 transitions. [2020-09-25 10:18:23,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:18:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 581 transitions. [2020-09-25 10:18:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 10:18:23,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:23,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:23,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 10:18:23,998 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:23,998 INFO L82 PathProgramCache]: Analyzing trace with hash -865140607, now seen corresponding path program 2 times [2020-09-25 10:18:23,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:23,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080429843] [2020-09-25 10:18:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:24,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:24,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 10:18:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:25,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:25,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:25,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:25,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:25,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:25,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:25,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:25,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 10:18:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:25,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:25,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:25,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:25,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:18:25,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:25,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:25,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:25,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:25,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:25,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:25,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080429843] [2020-09-25 10:18:25,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:25,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:25,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429248248] [2020-09-25 10:18:25,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:25,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:25,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:25,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:25,900 INFO L87 Difference]: Start difference. First operand 478 states and 581 transitions. Second operand 11 states. [2020-09-25 10:18:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:26,236 INFO L93 Difference]: Finished difference Result 549 states and 657 transitions. [2020-09-25 10:18:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:26,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 10:18:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:26,242 INFO L225 Difference]: With dead ends: 549 [2020-09-25 10:18:26,242 INFO L226 Difference]: Without dead ends: 547 [2020-09-25 10:18:26,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:18:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-09-25 10:18:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 500. [2020-09-25 10:18:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-09-25 10:18:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 604 transitions. [2020-09-25 10:18:26,278 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 604 transitions. Word has length 60 [2020-09-25 10:18:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:26,279 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 604 transitions. [2020-09-25 10:18:26,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 604 transitions. [2020-09-25 10:18:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:26,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:26,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:26,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 10:18:26,282 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:26,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:26,282 INFO L82 PathProgramCache]: Analyzing trace with hash -193250235, now seen corresponding path program 4 times [2020-09-25 10:18:26,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:26,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131392436] [2020-09-25 10:18:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:27,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:27,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:27,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-09-25 10:18:27,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:27,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:18:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:27,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:27,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:27,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:27,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:27,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:27,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:27,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:27,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:27,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:27,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:27,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:27,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:27,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131392436] [2020-09-25 10:18:27,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:27,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:18:27,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091764785] [2020-09-25 10:18:27,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:18:27,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:27,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:18:27,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:18:27,919 INFO L87 Difference]: Start difference. First operand 500 states and 604 transitions. Second operand 10 states. [2020-09-25 10:18:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:28,256 INFO L93 Difference]: Finished difference Result 724 states and 861 transitions. [2020-09-25 10:18:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:18:28,257 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 10:18:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:28,260 INFO L225 Difference]: With dead ends: 724 [2020-09-25 10:18:28,261 INFO L226 Difference]: Without dead ends: 722 [2020-09-25 10:18:28,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 10:18:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2020-09-25 10:18:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 552. [2020-09-25 10:18:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-09-25 10:18:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 668 transitions. [2020-09-25 10:18:28,299 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 668 transitions. Word has length 59 [2020-09-25 10:18:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:28,300 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 668 transitions. [2020-09-25 10:18:28,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:18:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 668 transitions. [2020-09-25 10:18:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:28,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:28,301 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:28,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 10:18:28,303 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash 682149, now seen corresponding path program 3 times [2020-09-25 10:18:28,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:28,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531465304] [2020-09-25 10:18:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:29,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:29,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:29,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1675 [2020-09-25 10:18:29,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:29,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:30,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:30,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:30,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:30,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:30,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:30,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:30,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531465304] [2020-09-25 10:18:30,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:30,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:30,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612573096] [2020-09-25 10:18:30,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:30,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:30,105 INFO L87 Difference]: Start difference. First operand 552 states and 668 transitions. Second operand 11 states. [2020-09-25 10:18:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:30,532 INFO L93 Difference]: Finished difference Result 729 states and 875 transitions. [2020-09-25 10:18:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:30,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 10:18:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:30,537 INFO L225 Difference]: With dead ends: 729 [2020-09-25 10:18:30,537 INFO L226 Difference]: Without dead ends: 727 [2020-09-25 10:18:30,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:18:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-09-25 10:18:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 638. [2020-09-25 10:18:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-09-25 10:18:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 776 transitions. [2020-09-25 10:18:30,572 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 776 transitions. Word has length 59 [2020-09-25 10:18:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:30,573 INFO L479 AbstractCegarLoop]: Abstraction has 638 states and 776 transitions. [2020-09-25 10:18:30,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 776 transitions. [2020-09-25 10:18:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:30,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:30,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:30,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-25 10:18:30,576 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1565211309, now seen corresponding path program 5 times [2020-09-25 10:18:30,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:30,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467579422] [2020-09-25 10:18:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:32,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:32,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:32,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1690 [2020-09-25 10:18:32,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:32,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:32,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:18:32,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:32,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:32,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:32,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:32,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:32,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:32,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:32,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:32,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:32,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:32,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:32,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:32,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:32,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:32,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467579422] [2020-09-25 10:18:32,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:32,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:18:32,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678747850] [2020-09-25 10:18:32,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:18:32,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:32,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:18:32,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:18:32,374 INFO L87 Difference]: Start difference. First operand 638 states and 776 transitions. Second operand 10 states. [2020-09-25 10:18:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:32,779 INFO L93 Difference]: Finished difference Result 801 states and 958 transitions. [2020-09-25 10:18:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:32,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 10:18:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:32,786 INFO L225 Difference]: With dead ends: 801 [2020-09-25 10:18:32,786 INFO L226 Difference]: Without dead ends: 799 [2020-09-25 10:18:32,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:18:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2020-09-25 10:18:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 670. [2020-09-25 10:18:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-09-25 10:18:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 816 transitions. [2020-09-25 10:18:32,844 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 816 transitions. Word has length 59 [2020-09-25 10:18:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:32,845 INFO L479 AbstractCegarLoop]: Abstraction has 670 states and 816 transitions. [2020-09-25 10:18:32,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:18:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 816 transitions. [2020-09-25 10:18:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:32,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:32,846 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:32,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-25 10:18:32,846 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash -335545933, now seen corresponding path program 4 times [2020-09-25 10:18:32,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:32,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48744408] [2020-09-25 10:18:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:32,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:33,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:33,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:34,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:34,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:34,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:34,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1802 [2020-09-25 10:18:34,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:34,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:34,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:34,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:34,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:34,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:34,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:34,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:34,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48744408] [2020-09-25 10:18:34,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:34,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:34,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692447676] [2020-09-25 10:18:34,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:34,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:34,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:34,775 INFO L87 Difference]: Start difference. First operand 670 states and 816 transitions. Second operand 11 states. [2020-09-25 10:18:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:35,102 INFO L93 Difference]: Finished difference Result 865 states and 1047 transitions. [2020-09-25 10:18:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:18:35,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 10:18:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:35,106 INFO L225 Difference]: With dead ends: 865 [2020-09-25 10:18:35,106 INFO L226 Difference]: Without dead ends: 863 [2020-09-25 10:18:35,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:18:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-09-25 10:18:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 755. [2020-09-25 10:18:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-09-25 10:18:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 921 transitions. [2020-09-25 10:18:35,150 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 921 transitions. Word has length 59 [2020-09-25 10:18:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:35,151 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 921 transitions. [2020-09-25 10:18:35,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 921 transitions. [2020-09-25 10:18:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 10:18:35,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:35,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:35,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-25 10:18:35,155 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1951488799, now seen corresponding path program 2 times [2020-09-25 10:18:35,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:35,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543498352] [2020-09-25 10:18:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:35,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:35,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:35,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:35,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:36,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:36,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 10:18:36,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:37,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:37,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:37,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:37,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:37,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:37,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:37,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 10:18:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:37,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:37,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:37,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:18:37,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:37,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:37,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:37,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:37,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:37,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543498352] [2020-09-25 10:18:37,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:37,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:37,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869282447] [2020-09-25 10:18:37,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:37,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:37,049 INFO L87 Difference]: Start difference. First operand 755 states and 921 transitions. Second operand 11 states. [2020-09-25 10:18:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:37,434 INFO L93 Difference]: Finished difference Result 825 states and 996 transitions. [2020-09-25 10:18:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:37,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 10:18:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:37,441 INFO L225 Difference]: With dead ends: 825 [2020-09-25 10:18:37,442 INFO L226 Difference]: Without dead ends: 823 [2020-09-25 10:18:37,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:18:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2020-09-25 10:18:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 755. [2020-09-25 10:18:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-09-25 10:18:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 921 transitions. [2020-09-25 10:18:37,479 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 921 transitions. Word has length 60 [2020-09-25 10:18:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:37,480 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 921 transitions. [2020-09-25 10:18:37,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 921 transitions. [2020-09-25 10:18:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:37,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:37,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:37,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-25 10:18:37,482 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463589, now seen corresponding path program 5 times [2020-09-25 10:18:37,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:37,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053822725] [2020-09-25 10:18:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:39,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:39,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:39,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1641 [2020-09-25 10:18:39,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:39,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:39,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:39,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:39,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:39,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:39,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:39,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:39,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:39,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053822725] [2020-09-25 10:18:39,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:39,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:39,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115311379] [2020-09-25 10:18:39,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:39,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:39,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:39,244 INFO L87 Difference]: Start difference. First operand 755 states and 921 transitions. Second operand 11 states. [2020-09-25 10:18:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:39,614 INFO L93 Difference]: Finished difference Result 907 states and 1099 transitions. [2020-09-25 10:18:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:18:39,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 10:18:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:39,619 INFO L225 Difference]: With dead ends: 907 [2020-09-25 10:18:39,619 INFO L226 Difference]: Without dead ends: 905 [2020-09-25 10:18:39,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:18:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2020-09-25 10:18:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 821. [2020-09-25 10:18:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-09-25 10:18:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1003 transitions. [2020-09-25 10:18:39,656 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1003 transitions. Word has length 59 [2020-09-25 10:18:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:39,656 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1003 transitions. [2020-09-25 10:18:39,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1003 transitions. [2020-09-25 10:18:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:39,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:39,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:39,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-25 10:18:39,659 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2112571323, now seen corresponding path program 4 times [2020-09-25 10:18:39,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:39,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185197041] [2020-09-25 10:18:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:39,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:41,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:41,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:41,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1454 [2020-09-25 10:18:41,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:41,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:41,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:18:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:41,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:41,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:41,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:41,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:41,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:41,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:41,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:41,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:41,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:41,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185197041] [2020-09-25 10:18:41,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:41,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:18:41,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653994742] [2020-09-25 10:18:41,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:18:41,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:41,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:18:41,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:18:41,206 INFO L87 Difference]: Start difference. First operand 821 states and 1003 transitions. Second operand 10 states. [2020-09-25 10:18:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:41,564 INFO L93 Difference]: Finished difference Result 1082 states and 1306 transitions. [2020-09-25 10:18:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:18:41,565 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 10:18:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:41,570 INFO L225 Difference]: With dead ends: 1082 [2020-09-25 10:18:41,570 INFO L226 Difference]: Without dead ends: 1080 [2020-09-25 10:18:41,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 10:18:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2020-09-25 10:18:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 873. [2020-09-25 10:18:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-09-25 10:18:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1067 transitions. [2020-09-25 10:18:41,622 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1067 transitions. Word has length 59 [2020-09-25 10:18:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:41,622 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1067 transitions. [2020-09-25 10:18:41,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:18:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1067 transitions. [2020-09-25 10:18:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:41,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:41,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:41,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-25 10:18:41,625 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash 616502515, now seen corresponding path program 6 times [2020-09-25 10:18:41,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:41,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357912205] [2020-09-25 10:18:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:43,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:43,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:43,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:43,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:43,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:43,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:43,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:43,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:43,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:43,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:43,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:43,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:43,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:43,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357912205] [2020-09-25 10:18:43,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:43,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:43,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974589769] [2020-09-25 10:18:43,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:43,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:43,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:43,450 INFO L87 Difference]: Start difference. First operand 873 states and 1067 transitions. Second operand 11 states. [2020-09-25 10:18:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:43,952 INFO L93 Difference]: Finished difference Result 1095 states and 1329 transitions. [2020-09-25 10:18:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 10:18:43,952 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 10:18:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:43,957 INFO L225 Difference]: With dead ends: 1095 [2020-09-25 10:18:43,957 INFO L226 Difference]: Without dead ends: 1093 [2020-09-25 10:18:43,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-09-25 10:18:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2020-09-25 10:18:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 970. [2020-09-25 10:18:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-09-25 10:18:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1189 transitions. [2020-09-25 10:18:43,997 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1189 transitions. Word has length 59 [2020-09-25 10:18:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:43,997 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1189 transitions. [2020-09-25 10:18:43,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1189 transitions. [2020-09-25 10:18:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:18:43,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:43,999 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:43,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-25 10:18:43,999 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1846167891, now seen corresponding path program 5 times [2020-09-25 10:18:44,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:44,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548178745] [2020-09-25 10:18:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:44,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:44,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:44,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:44,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:45,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:45,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:18:45,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:45,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1469 [2020-09-25 10:18:45,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:45,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:18:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 10:18:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:45,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:45,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:45,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:45,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:45,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:45,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:45,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:45,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:45,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:45,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548178745] [2020-09-25 10:18:45,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:45,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:18:45,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15112435] [2020-09-25 10:18:45,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:18:45,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:45,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:18:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:18:45,573 INFO L87 Difference]: Start difference. First operand 970 states and 1189 transitions. Second operand 10 states. [2020-09-25 10:18:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:45,985 INFO L93 Difference]: Finished difference Result 1170 states and 1417 transitions. [2020-09-25 10:18:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:45,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 10:18:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:45,990 INFO L225 Difference]: With dead ends: 1170 [2020-09-25 10:18:45,990 INFO L226 Difference]: Without dead ends: 1168 [2020-09-25 10:18:45,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:18:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2020-09-25 10:18:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1002. [2020-09-25 10:18:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-09-25 10:18:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1229 transitions. [2020-09-25 10:18:46,030 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1229 transitions. Word has length 59 [2020-09-25 10:18:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:46,030 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1229 transitions. [2020-09-25 10:18:46,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:18:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1229 transitions. [2020-09-25 10:18:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 10:18:46,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:46,032 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:46,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-25 10:18:46,033 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2055645309, now seen corresponding path program 2 times [2020-09-25 10:18:46,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:46,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983175537] [2020-09-25 10:18:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:46,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:46,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:47,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:47,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 10:18:47,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:18:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1486 [2020-09-25 10:18:47,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:47,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:18:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 10:18:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 10:18:47,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:47,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:47,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:47,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:47,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:47,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:47,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:47,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:47,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:47,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 10:18:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:47,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:47,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:47,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:47,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:18:47,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:47,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:47,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:47,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:47,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:47,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:47,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 10:18:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:47,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:47,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 10:18:47,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983175537] [2020-09-25 10:18:47,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:47,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:18:47,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341960914] [2020-09-25 10:18:47,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:18:47,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:18:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:18:47,646 INFO L87 Difference]: Start difference. First operand 1002 states and 1229 transitions. Second operand 11 states. [2020-09-25 10:18:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:47,970 INFO L93 Difference]: Finished difference Result 1045 states and 1272 transitions. [2020-09-25 10:18:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:18:47,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-25 10:18:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:47,974 INFO L225 Difference]: With dead ends: 1045 [2020-09-25 10:18:47,975 INFO L226 Difference]: Without dead ends: 1043 [2020-09-25 10:18:47,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:18:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-09-25 10:18:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1002. [2020-09-25 10:18:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-09-25 10:18:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1229 transitions. [2020-09-25 10:18:48,016 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1229 transitions. Word has length 62 [2020-09-25 10:18:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:48,017 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1229 transitions. [2020-09-25 10:18:48,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:18:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1229 transitions. [2020-09-25 10:18:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 10:18:48,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:48,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:48,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-25 10:18:48,019 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1385223511, now seen corresponding path program 3 times [2020-09-25 10:18:48,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:48,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911586411] [2020-09-25 10:18:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:48,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:48,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:48,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking...