/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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 09:11:15,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:11:15,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:11:15,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:11:15,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:11:15,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:11:15,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:11:15,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:11:15,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:11:15,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:11:15,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:11:15,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:11:15,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:11:15,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:11:15,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:11:15,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:11:15,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:11:15,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:11:15,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:11:15,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:11:15,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:11:15,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:11:15,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:11:15,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:11:15,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:11:15,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:11:15,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:11:15,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:11:15,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:11:15,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:11:15,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:11:15,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:11:15,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:11:15,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:11:15,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:11:15,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:11:15,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:11:15,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:11:15,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:11:15,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:11:15,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:11:15,163 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 09:11:15,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:11:15,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:11:15,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:11:15,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:11:15,192 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:11:15,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:11:15,192 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:11:15,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:11:15,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:11:15,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:11:15,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:11:15,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:11:15,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:11:15,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:11:15,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:11:15,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:11:15,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:11:15,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:11:15,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:11:15,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:11:15,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:11:15,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:11:15,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:11:15,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:11:15,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:11:15,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:11:15,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:11:15,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:11:15,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:11:15,197 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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:11:15,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:11:15,685 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:11:15,690 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:11:15,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:11:15,693 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:11:15,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 09:11:15,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8db8c39a3/4d79aabcf0b0454cae9bc4e2976efcff/FLAG60ae9995e [2020-09-25 09:11:16,341 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:11:16,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 09:11:16,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8db8c39a3/4d79aabcf0b0454cae9bc4e2976efcff/FLAG60ae9995e [2020-09-25 09:11:16,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8db8c39a3/4d79aabcf0b0454cae9bc4e2976efcff [2020-09-25 09:11:16,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:11:16,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:11:16,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:11:16,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:11:16,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:11:16,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:11:16" (1/1) ... [2020-09-25 09:11:16,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5273b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:16, skipping insertion in model container [2020-09-25 09:11:16,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:11:16" (1/1) ... [2020-09-25 09:11:16,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:11:16,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:11:17,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:11:17,100 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:11:17,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:11:17,153 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:11:17,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17 WrapperNode [2020-09-25 09:11:17,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:11:17,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:11:17,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:11:17,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:11:17,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (1/1) ... [2020-09-25 09:11:17,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (1/1) ... [2020-09-25 09:11:17,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (1/1) ... [2020-09-25 09:11:17,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (1/1) ... [2020-09-25 09:11:17,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (1/1) ... [2020-09-25 09:11:17,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (1/1) ... [2020-09-25 09:11:17,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (1/1) ... [2020-09-25 09:11:17,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:11:17,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:11:17,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:11:17,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:11:17,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (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 09:11:17,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:11:17,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:11:17,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:11:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:11:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:11:17,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:11:17,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:11:17,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:11:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:11:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:11:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:11:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:11:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:11:17,681 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:11:17,682 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 09:11:17,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:11:17 BoogieIcfgContainer [2020-09-25 09:11:17,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:11:17,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:11:17,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:11:17,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:11:17,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:11:16" (1/3) ... [2020-09-25 09:11:17,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43136555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:11:17, skipping insertion in model container [2020-09-25 09:11:17,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:11:17" (2/3) ... [2020-09-25 09:11:17,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43136555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:11:17, skipping insertion in model container [2020-09-25 09:11:17,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:11:17" (3/3) ... [2020-09-25 09:11:17,698 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-09-25 09:11:17,710 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:11:17,720 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:11:17,750 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:11:17,792 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:11:17,793 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:11:17,793 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:11:17,793 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:11:17,793 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:11:17,793 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:11:17,794 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:11:17,794 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:11:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-25 09:11:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 09:11:17,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:17,827 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 09:11:17,827 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 288343897, now seen corresponding path program 1 times [2020-09-25 09:11:17,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:17,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588604232] [2020-09-25 09:11:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:17,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:18,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:18,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:11:18,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:18,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-25 09:11:18,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:18,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 09:11:18,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 09:11:18,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:18,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:18,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:18,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:18,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:18,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:11:18,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:18,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:18,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:18,125 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 09:11:18,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588604232] [2020-09-25 09:11:18,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:18,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:11:18,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229080787] [2020-09-25 09:11:18,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:11:18,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:11:18,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:11:18,153 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-09-25 09:11:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:18,182 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-09-25 09:11:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:11:18,184 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-09-25 09:11:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:18,195 INFO L225 Difference]: With dead ends: 75 [2020-09-25 09:11:18,196 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 09:11:18,199 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 09:11:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 09:11:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-25 09:11:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 09:11:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-25 09:11:18,245 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2020-09-25 09:11:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:18,246 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-25 09:11:18,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:11:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-25 09:11:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 09:11:18,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:18,248 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 09:11:18,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:11:18,248 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash 320540924, now seen corresponding path program 1 times [2020-09-25 09:11:18,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:18,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309588553] [2020-09-25 09:11:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:18,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:18,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:18,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:11:18,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:18,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 09:11:18,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:18,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:11:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 09:11:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 09:11:18,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:18,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:18,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:18,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:18,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:18,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:11:18,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:18,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:18,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:18,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:18,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:18,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:18,478 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 09:11:18,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309588553] [2020-09-25 09:11:18,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:18,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:11:18,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258012810] [2020-09-25 09:11:18,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:11:18,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:11:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:11:18,485 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-09-25 09:11:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:18,585 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-09-25 09:11:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:11:18,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 09:11:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:18,588 INFO L225 Difference]: With dead ends: 67 [2020-09-25 09:11:18,588 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 09:11:18,589 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 09:11:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 09:11:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-25 09:11:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 09:11:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-25 09:11:18,598 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2020-09-25 09:11:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:18,602 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-25 09:11:18,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:11:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-25 09:11:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 09:11:18,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:18,604 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 09:11:18,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:11:18,604 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:18,605 INFO L82 PathProgramCache]: Analyzing trace with hash 751787059, now seen corresponding path program 1 times [2020-09-25 09:11:18,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:18,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629054668] [2020-09-25 09:11:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:18,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:18,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 09:11:18,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:18,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-09-25 09:11:18,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:18,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:11:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:18,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 09:11:18,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:19,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:19,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:19,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:19,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:19,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:19,051 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 09:11:19,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629054668] [2020-09-25 09:11:19,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:19,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:11:19,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810228054] [2020-09-25 09:11:19,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:11:19,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:11:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:11:19,054 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states. [2020-09-25 09:11:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:19,230 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-25 09:11:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:11:19,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-25 09:11:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:19,233 INFO L225 Difference]: With dead ends: 88 [2020-09-25 09:11:19,233 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 09:11:19,234 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 09:11:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 09:11:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-09-25 09:11:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-25 09:11:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-25 09:11:19,246 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 37 [2020-09-25 09:11:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:19,246 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-25 09:11:19,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:11:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-25 09:11:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 09:11:19,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:19,248 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 09:11:19,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:11:19,249 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash 3796503, now seen corresponding path program 1 times [2020-09-25 09:11:19,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:19,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479843607] [2020-09-25 09:11:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 09:11:19,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-09-25 09:11:19,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:11:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:11:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 09:11:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:19,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:19,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:19,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:19,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 09:11:19,582 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 09:11:19,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479843607] [2020-09-25 09:11:19,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:19,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:11:19,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566888694] [2020-09-25 09:11:19,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:11:19,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:11:19,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:11:19,587 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 7 states. [2020-09-25 09:11:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:19,738 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-09-25 09:11:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 09:11:19,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 09:11:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:19,743 INFO L225 Difference]: With dead ends: 105 [2020-09-25 09:11:19,743 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 09:11:19,744 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 09:11:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 09:11:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-09-25 09:11:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 09:11:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 09:11:19,757 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 38 [2020-09-25 09:11:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:19,758 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 09:11:19,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:11:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 09:11:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 09:11:19,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:19,759 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 09:11:19,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:11:19,760 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:19,760 INFO L82 PathProgramCache]: Analyzing trace with hash 197728887, now seen corresponding path program 1 times [2020-09-25 09:11:19,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:19,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776793395] [2020-09-25 09:11:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 09:11:19,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-25 09:11:19,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:11:19,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:11:19,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 09:11:19,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:19,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:19,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:19,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:19,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:19,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:19,944 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 09:11:19,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776793395] [2020-09-25 09:11:19,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:19,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:11:19,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870478807] [2020-09-25 09:11:19,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:11:19,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:19,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:11:19,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:11:19,946 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-09-25 09:11:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:20,054 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-09-25 09:11:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 09:11:20,055 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 09:11:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:20,056 INFO L225 Difference]: With dead ends: 116 [2020-09-25 09:11:20,057 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 09:11:20,057 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 09:11:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 09:11:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-09-25 09:11:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-25 09:11:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-09-25 09:11:20,069 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 38 [2020-09-25 09:11:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:20,070 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-09-25 09:11:20,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:11:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-09-25 09:11:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 09:11:20,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:20,072 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 09:11:20,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:11:20,072 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash 88652198, now seen corresponding path program 1 times [2020-09-25 09:11:20,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:20,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020350260] [2020-09-25 09:11:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:20,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:21,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:21,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 09:11:21,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:21,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-09-25 09:11:21,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:21,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:21,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:21,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:21,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 09:11:21,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:21,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:21,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:21,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:21,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:21,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:21,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:21,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:21,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:21,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:21,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:21,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:21,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 09:11:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:21,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:21,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:21,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:21,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:21,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:11:21,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:21,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:21,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:21,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:21,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:21,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:21,253 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 09:11:21,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020350260] [2020-09-25 09:11:21,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:21,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:21,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553234111] [2020-09-25 09:11:21,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:21,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:21,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:21,256 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 9 states. [2020-09-25 09:11:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:21,446 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-25 09:11:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:21,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 09:11:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:21,449 INFO L225 Difference]: With dead ends: 129 [2020-09-25 09:11:21,449 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 09:11:21,450 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 09:11:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 09:11:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2020-09-25 09:11:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 09:11:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-25 09:11:21,462 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 49 [2020-09-25 09:11:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:21,463 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-25 09:11:21,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-25 09:11:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 09:11:21,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:21,465 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 09:11:21,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:11:21,465 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1084443264, now seen corresponding path program 1 times [2020-09-25 09:11:21,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:21,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877629368] [2020-09-25 09:11:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:21,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:21,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:22,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:22,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 09:11:22,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:22,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-09-25 09:11:22,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:22,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:22,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 09:11:22,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:22,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:22,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:22,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:22,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:22,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:22,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:22,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:22,239 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 09:11:22,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877629368] [2020-09-25 09:11:22,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:22,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:22,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49429121] [2020-09-25 09:11:22,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:22,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:22,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:22,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:22,241 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 9 states. [2020-09-25 09:11:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:22,488 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2020-09-25 09:11:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:22,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 09:11:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:22,490 INFO L225 Difference]: With dead ends: 164 [2020-09-25 09:11:22,491 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 09:11:22,493 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 09:11:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 09:11:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-09-25 09:11:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-25 09:11:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-25 09:11:22,532 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 48 [2020-09-25 09:11:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:22,533 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-25 09:11:22,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-25 09:11:22,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 09:11:22,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:22,538 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 09:11:22,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:11:22,538 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1278375648, now seen corresponding path program 1 times [2020-09-25 09:11:22,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:22,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199331092] [2020-09-25 09:11:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:22,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 09:11:23,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:23,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-09-25 09:11:23,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:23,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:23,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 09:11:23,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:23,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:23,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:23,262 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 09:11:23,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199331092] [2020-09-25 09:11:23,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:23,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:23,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565304883] [2020-09-25 09:11:23,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:23,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:23,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:23,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:23,265 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 9 states. [2020-09-25 09:11:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:23,502 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-09-25 09:11:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:23,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 09:11:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:23,505 INFO L225 Difference]: With dead ends: 185 [2020-09-25 09:11:23,505 INFO L226 Difference]: Without dead ends: 183 [2020-09-25 09:11:23,506 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 09:11:23,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-25 09:11:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-25 09:11:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-25 09:11:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2020-09-25 09:11:23,516 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 48 [2020-09-25 09:11:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:23,516 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2020-09-25 09:11:23,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2020-09-25 09:11:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 09:11:23,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:23,518 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 09:11:23,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:11:23,519 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash -287517810, now seen corresponding path program 2 times [2020-09-25 09:11:23,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:23,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346930952] [2020-09-25 09:11:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:24,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:24,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 09:11:24,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:24,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-09-25 09:11:24,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:24,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:24,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 09:11:24,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:24,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:24,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:24,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:24,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:24,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:24,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:24,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:24,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:24,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:24,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:24,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:24,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:24,153 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 09:11:24,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346930952] [2020-09-25 09:11:24,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:24,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:24,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39888219] [2020-09-25 09:11:24,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:24,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:24,156 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand 9 states. [2020-09-25 09:11:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:24,391 INFO L93 Difference]: Finished difference Result 227 states and 262 transitions. [2020-09-25 09:11:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:11:24,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 09:11:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:24,393 INFO L225 Difference]: With dead ends: 227 [2020-09-25 09:11:24,393 INFO L226 Difference]: Without dead ends: 225 [2020-09-25 09:11:24,394 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 09:11:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-25 09:11:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 184. [2020-09-25 09:11:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 09:11:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-09-25 09:11:24,407 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 48 [2020-09-25 09:11:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:24,407 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-09-25 09:11:24,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-09-25 09:11:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 09:11:24,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:24,409 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 09:11:24,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 09:11:24,410 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:24,410 INFO L82 PathProgramCache]: Analyzing trace with hash 942147566, now seen corresponding path program 2 times [2020-09-25 09:11:24,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:24,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615421653] [2020-09-25 09:11:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:24,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:24,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:24,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 09:11:24,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:24,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-09-25 09:11:24,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:24,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:24,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:24,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:24,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 09:11:24,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:25,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:25,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:25,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:25,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:25,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:25,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:25,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:25,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:25,036 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 09:11:25,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615421653] [2020-09-25 09:11:25,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:25,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:25,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784075393] [2020-09-25 09:11:25,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:25,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:25,038 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 9 states. [2020-09-25 09:11:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:25,227 INFO L93 Difference]: Finished difference Result 257 states and 299 transitions. [2020-09-25 09:11:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:11:25,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 09:11:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:25,229 INFO L225 Difference]: With dead ends: 257 [2020-09-25 09:11:25,229 INFO L226 Difference]: Without dead ends: 255 [2020-09-25 09:11:25,230 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 09:11:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-25 09:11:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 215. [2020-09-25 09:11:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 09:11:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 09:11:25,241 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 48 [2020-09-25 09:11:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:25,241 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 09:11:25,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 09:11:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 09:11:25,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:25,242 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 09:11:25,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 09:11:25,243 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:25,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1391225462, now seen corresponding path program 1 times [2020-09-25 09:11:25,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:25,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555597615] [2020-09-25 09:11:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:25,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:26,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:26,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 09:11:26,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-09-25 09:11:26,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:26,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 09:11:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 09:11:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:26,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:26,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:26,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:26,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:26,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:26,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:26,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:26,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:26,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:26,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 09:11:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:26,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:26,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:26,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:26,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:26,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:26,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:26,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:26,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:26,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:26,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:26,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:26,232 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 09:11:26,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555597615] [2020-09-25 09:11:26,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:26,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:26,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672350350] [2020-09-25 09:11:26,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:26,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:26,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:26,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:26,235 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 09:11:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:26,412 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2020-09-25 09:11:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:26,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 09:11:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:26,415 INFO L225 Difference]: With dead ends: 245 [2020-09-25 09:11:26,415 INFO L226 Difference]: Without dead ends: 243 [2020-09-25 09:11:26,416 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 09:11:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-25 09:11:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-09-25 09:11:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 09:11:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 09:11:26,429 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 50 [2020-09-25 09:11:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:26,430 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 09:11:26,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 09:11:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 09:11:26,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:26,431 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 09:11:26,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 09:11:26,432 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1955950980, now seen corresponding path program 1 times [2020-09-25 09:11:26,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:26,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182181003] [2020-09-25 09:11:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:26,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:26,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:26,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:26,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 09:11:26,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-09-25 09:11:26,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:26,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:11:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 09:11:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:11:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:27,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:27,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:27,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:27,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:27,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:27,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:27,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:27,077 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 09:11:27,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182181003] [2020-09-25 09:11:27,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:27,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:27,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064780558] [2020-09-25 09:11:27,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:27,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:27,080 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 09:11:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:27,268 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2020-09-25 09:11:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:11:27,269 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 09:11:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:27,271 INFO L225 Difference]: With dead ends: 286 [2020-09-25 09:11:27,271 INFO L226 Difference]: Without dead ends: 284 [2020-09-25 09:11:27,273 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 09:11:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-25 09:11:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2020-09-25 09:11:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-25 09:11:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2020-09-25 09:11:27,289 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 49 [2020-09-25 09:11:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:27,289 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2020-09-25 09:11:27,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2020-09-25 09:11:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 09:11:27,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:27,291 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 09:11:27,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 09:11:27,291 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:27,292 INFO L82 PathProgramCache]: Analyzing trace with hash -798805526, now seen corresponding path program 1 times [2020-09-25 09:11:27,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:27,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749878938] [2020-09-25 09:11:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:27,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:27,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 09:11:28,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:28,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-09-25 09:11:28,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:28,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:11:28,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 09:11:28,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:28,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:28,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:28,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 09:11:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:28,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:28,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:28,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:28,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:28,227 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 09:11:28,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749878938] [2020-09-25 09:11:28,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:28,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:28,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912825270] [2020-09-25 09:11:28,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:28,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:28,230 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand 9 states. [2020-09-25 09:11:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:28,393 INFO L93 Difference]: Finished difference Result 268 states and 313 transitions. [2020-09-25 09:11:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:28,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 09:11:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:28,396 INFO L225 Difference]: With dead ends: 268 [2020-09-25 09:11:28,396 INFO L226 Difference]: Without dead ends: 266 [2020-09-25 09:11:28,397 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 09:11:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-25 09:11:28,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 238. [2020-09-25 09:11:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-09-25 09:11:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 283 transitions. [2020-09-25 09:11:28,412 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 283 transitions. Word has length 50 [2020-09-25 09:11:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:28,413 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 283 transitions. [2020-09-25 09:11:28,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 283 transitions. [2020-09-25 09:11:28,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 09:11:28,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:28,414 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 09:11:28,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 09:11:28,414 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004924, now seen corresponding path program 2 times [2020-09-25 09:11:28,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:28,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944995993] [2020-09-25 09:11:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 09:11:28,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:28,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-09-25 09:11:28,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:28,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:11:28,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 09:11:28,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:28,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:29,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:29,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:29,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:29,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:29,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:29,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:29,009 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 09:11:29,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944995993] [2020-09-25 09:11:29,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:29,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:29,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396593720] [2020-09-25 09:11:29,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:29,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:29,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:29,011 INFO L87 Difference]: Start difference. First operand 238 states and 283 transitions. Second operand 9 states. [2020-09-25 09:11:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:29,241 INFO L93 Difference]: Finished difference Result 302 states and 354 transitions. [2020-09-25 09:11:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:29,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 09:11:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:29,243 INFO L225 Difference]: With dead ends: 302 [2020-09-25 09:11:29,243 INFO L226 Difference]: Without dead ends: 300 [2020-09-25 09:11:29,244 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 09:11:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-25 09:11:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 260. [2020-09-25 09:11:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-25 09:11:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 311 transitions. [2020-09-25 09:11:29,259 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 311 transitions. Word has length 49 [2020-09-25 09:11:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:29,259 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 311 transitions. [2020-09-25 09:11:29,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 311 transitions. [2020-09-25 09:11:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 09:11:29,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:29,261 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 09:11:29,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 09:11:29,261 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1367702887, now seen corresponding path program 2 times [2020-09-25 09:11:29,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:29,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686027476] [2020-09-25 09:11:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:29,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:29,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:29,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:31,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:31,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 09:11:31,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:11:31,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2177 [2020-09-25 09:11:31,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:31,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 09:11:31,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:31,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:31,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:31,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:31,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:31,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:31,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:31,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:31,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:31,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 09:11:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:31,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:31,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:31,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:31,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:31,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:31,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:31,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:31,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:31,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:31,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:31,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:11:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:31,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:31,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:31,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:31,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:31,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:31,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:31,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:31,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:31,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:31,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:31,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:31,577 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 09:11:31,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686027476] [2020-09-25 09:11:31,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:31,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:31,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185385814] [2020-09-25 09:11:31,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:31,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:31,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:31,579 INFO L87 Difference]: Start difference. First operand 260 states and 311 transitions. Second operand 11 states. [2020-09-25 09:11:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:31,838 INFO L93 Difference]: Finished difference Result 301 states and 352 transitions. [2020-09-25 09:11:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:11:31,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-09-25 09:11:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:31,841 INFO L225 Difference]: With dead ends: 301 [2020-09-25 09:11:31,841 INFO L226 Difference]: Without dead ends: 299 [2020-09-25 09:11:31,843 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 09:11:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-25 09:11:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 273. [2020-09-25 09:11:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-09-25 09:11:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 324 transitions. [2020-09-25 09:11:31,857 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 324 transitions. Word has length 61 [2020-09-25 09:11:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:31,857 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 324 transitions. [2020-09-25 09:11:31,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 324 transitions. [2020-09-25 09:11:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 09:11:31,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:31,859 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 09:11:31,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 09:11:31,859 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2112840589, now seen corresponding path program 1 times [2020-09-25 09:11:31,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:31,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335327321] [2020-09-25 09:11:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:31,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:32,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:32,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 09:11:33,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:11:33,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1769 [2020-09-25 09:11:33,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 09:11:33,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:33,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:33,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:11:33,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:33,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:33,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 09:11:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:33,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:33,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:33,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:33,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:33,789 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 09:11:33,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335327321] [2020-09-25 09:11:33,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:33,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:33,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962507357] [2020-09-25 09:11:33,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:33,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:33,795 INFO L87 Difference]: Start difference. First operand 273 states and 324 transitions. Second operand 11 states. [2020-09-25 09:11:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:34,306 INFO L93 Difference]: Finished difference Result 315 states and 368 transitions. [2020-09-25 09:11:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:34,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 09:11:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:34,309 INFO L225 Difference]: With dead ends: 315 [2020-09-25 09:11:34,310 INFO L226 Difference]: Without dead ends: 313 [2020-09-25 09:11:34,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 09:11:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-25 09:11:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 273. [2020-09-25 09:11:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-09-25 09:11:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 324 transitions. [2020-09-25 09:11:34,336 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 324 transitions. Word has length 60 [2020-09-25 09:11:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:34,336 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 324 transitions. [2020-09-25 09:11:34,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 324 transitions. [2020-09-25 09:11:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:34,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:34,342 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 09:11:34,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 09:11:34,343 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash 320690707, now seen corresponding path program 3 times [2020-09-25 09:11:34,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:34,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645756060] [2020-09-25 09:11:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:34,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:36,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:36,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:36,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1974 [2020-09-25 09:11:36,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:36,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:36,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:11:36,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:36,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:36,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:36,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:36,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:36,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:36,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:36,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:36,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:36,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:36,451 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 09:11:36,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645756060] [2020-09-25 09:11:36,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:36,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:11:36,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927607703] [2020-09-25 09:11:36,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:11:36,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:11:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:11:36,455 INFO L87 Difference]: Start difference. First operand 273 states and 324 transitions. Second operand 10 states. [2020-09-25 09:11:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:36,873 INFO L93 Difference]: Finished difference Result 408 states and 479 transitions. [2020-09-25 09:11:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:36,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 09:11:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:36,876 INFO L225 Difference]: With dead ends: 408 [2020-09-25 09:11:36,876 INFO L226 Difference]: Without dead ends: 406 [2020-09-25 09:11:36,877 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 09:11:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-09-25 09:11:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 305. [2020-09-25 09:11:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-25 09:11:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 364 transitions. [2020-09-25 09:11:36,896 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 364 transitions. Word has length 59 [2020-09-25 09:11:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:36,896 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 364 transitions. [2020-09-25 09:11:36,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:11:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 364 transitions. [2020-09-25 09:11:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:36,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:36,897 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 09:11:36,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 09:11:36,898 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash 514623091, now seen corresponding path program 1 times [2020-09-25 09:11:36,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:36,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197297648] [2020-09-25 09:11:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:36,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:36,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:37,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:37,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:39,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-09-25 09:11:39,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:39,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:39,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:39,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:39,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:39,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:39,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:39,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:39,167 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 09:11:39,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197297648] [2020-09-25 09:11:39,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:39,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:39,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946577553] [2020-09-25 09:11:39,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:39,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:39,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:39,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:39,179 INFO L87 Difference]: Start difference. First operand 305 states and 364 transitions. Second operand 11 states. [2020-09-25 09:11:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:39,527 INFO L93 Difference]: Finished difference Result 428 states and 508 transitions. [2020-09-25 09:11:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:11:39,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 09:11:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:39,530 INFO L225 Difference]: With dead ends: 428 [2020-09-25 09:11:39,530 INFO L226 Difference]: Without dead ends: 426 [2020-09-25 09:11:39,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:11:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-09-25 09:11:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 339. [2020-09-25 09:11:39,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-09-25 09:11:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 407 transitions. [2020-09-25 09:11:39,560 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 407 transitions. Word has length 59 [2020-09-25 09:11:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:39,560 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 407 transitions. [2020-09-25 09:11:39,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 407 transitions. [2020-09-25 09:11:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 09:11:39,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:39,562 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 09:11:39,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 09:11:39,562 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1520420653, now seen corresponding path program 1 times [2020-09-25 09:11:39,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:39,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43659337] [2020-09-25 09:11:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:41,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:41,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 09:11:41,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:11:41,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1895 [2020-09-25 09:11:41,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:41,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:41,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:41,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 09:11:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:41,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:41,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:41,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:41,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:41,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:41,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:41,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:41,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:41,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 09:11:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:41,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:41,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:41,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:41,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:41,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:41,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:41,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:41,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:41,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:41,599 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 09:11:41,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43659337] [2020-09-25 09:11:41,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:41,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:41,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531609838] [2020-09-25 09:11:41,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:41,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:41,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:41,601 INFO L87 Difference]: Start difference. First operand 339 states and 407 transitions. Second operand 11 states. [2020-09-25 09:11:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:41,954 INFO L93 Difference]: Finished difference Result 401 states and 476 transitions. [2020-09-25 09:11:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:41,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 09:11:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:41,957 INFO L225 Difference]: With dead ends: 401 [2020-09-25 09:11:41,957 INFO L226 Difference]: Without dead ends: 399 [2020-09-25 09:11:41,958 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 09:11:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-09-25 09:11:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 360. [2020-09-25 09:11:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-09-25 09:11:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 433 transitions. [2020-09-25 09:11:41,975 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 433 transitions. Word has length 60 [2020-09-25 09:11:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:41,975 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 433 transitions. [2020-09-25 09:11:41,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 433 transitions. [2020-09-25 09:11:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:41,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:41,977 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 09:11:41,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 09:11:41,977 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash -214388301, now seen corresponding path program 2 times [2020-09-25 09:11:41,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:41,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101065460] [2020-09-25 09:11:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:42,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:43,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:43,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:43,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:43,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1740 [2020-09-25 09:11:43,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:43,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:43,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:43,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:43,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:43,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:43,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:43,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:43,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:43,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:43,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:43,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:43,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:43,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:43,851 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 09:11:43,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101065460] [2020-09-25 09:11:43,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:43,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:43,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758614083] [2020-09-25 09:11:43,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:43,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:43,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:43,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:43,854 INFO L87 Difference]: Start difference. First operand 360 states and 433 transitions. Second operand 11 states. [2020-09-25 09:11:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:44,398 INFO L93 Difference]: Finished difference Result 522 states and 625 transitions. [2020-09-25 09:11:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:44,399 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 09:11:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:44,403 INFO L225 Difference]: With dead ends: 522 [2020-09-25 09:11:44,403 INFO L226 Difference]: Without dead ends: 520 [2020-09-25 09:11:44,404 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 09:11:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-09-25 09:11:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 445. [2020-09-25 09:11:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-09-25 09:11:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 539 transitions. [2020-09-25 09:11:44,442 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 539 transitions. Word has length 59 [2020-09-25 09:11:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:44,442 INFO L479 AbstractCegarLoop]: Abstraction has 445 states and 539 transitions. [2020-09-25 09:11:44,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 539 transitions. [2020-09-25 09:11:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:44,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:44,445 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 09:11:44,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 09:11:44,445 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -20455917, now seen corresponding path program 3 times [2020-09-25 09:11:44,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:44,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12279882] [2020-09-25 09:11:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:44,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:44,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:44,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:44,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:44,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:44,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:44,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:46,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:46,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:46,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:46,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1734 [2020-09-25 09:11:46,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:46,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:11:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:46,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:46,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:46,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:46,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:46,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:46,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:46,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:46,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:46,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:46,298 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 09:11:46,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12279882] [2020-09-25 09:11:46,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:46,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:11:46,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328758360] [2020-09-25 09:11:46,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:11:46,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:46,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:11:46,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:11:46,303 INFO L87 Difference]: Start difference. First operand 445 states and 539 transitions. Second operand 10 states. [2020-09-25 09:11:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:46,766 INFO L93 Difference]: Finished difference Result 582 states and 697 transitions. [2020-09-25 09:11:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:46,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 09:11:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:46,770 INFO L225 Difference]: With dead ends: 582 [2020-09-25 09:11:46,770 INFO L226 Difference]: Without dead ends: 580 [2020-09-25 09:11:46,771 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 09:11:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-09-25 09:11:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 478. [2020-09-25 09:11:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-25 09:11:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 581 transitions. [2020-09-25 09:11:46,796 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 581 transitions. Word has length 59 [2020-09-25 09:11:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:46,796 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 581 transitions. [2020-09-25 09:11:46,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:11:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 581 transitions. [2020-09-25 09:11:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 09:11:46,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:46,798 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 09:11:46,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 09:11:46,799 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:46,799 INFO L82 PathProgramCache]: Analyzing trace with hash -865140607, now seen corresponding path program 2 times [2020-09-25 09:11:46,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:46,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417779305] [2020-09-25 09:11:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:46,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:46,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:47,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:48,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 09:11:48,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:48,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:48,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:48,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:48,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:48,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:48,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:48,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:48,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:48,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:48,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 09:11:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:48,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:48,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:48,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:48,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:48,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:48,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:48,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:48,659 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 09:11:48,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417779305] [2020-09-25 09:11:48,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:48,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:48,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503860798] [2020-09-25 09:11:48,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:48,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:48,662 INFO L87 Difference]: Start difference. First operand 478 states and 581 transitions. Second operand 11 states. [2020-09-25 09:11:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:48,982 INFO L93 Difference]: Finished difference Result 549 states and 657 transitions. [2020-09-25 09:11:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:11:48,982 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 09:11:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:48,985 INFO L225 Difference]: With dead ends: 549 [2020-09-25 09:11:48,986 INFO L226 Difference]: Without dead ends: 547 [2020-09-25 09:11:48,986 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 09:11:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-09-25 09:11:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 500. [2020-09-25 09:11:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-09-25 09:11:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 604 transitions. [2020-09-25 09:11:49,014 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 604 transitions. Word has length 60 [2020-09-25 09:11:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:49,015 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 604 transitions. [2020-09-25 09:11:49,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 604 transitions. [2020-09-25 09:11:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:49,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:49,018 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 09:11:49,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 09:11:49,018 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:49,018 INFO L82 PathProgramCache]: Analyzing trace with hash -193250235, now seen corresponding path program 4 times [2020-09-25 09:11:49,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:49,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895819166] [2020-09-25 09:11:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:50,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:50,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1507 [2020-09-25 09:11:50,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:11:50,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:50,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:50,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:50,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:50,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:50,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:50,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:50,646 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 09:11:50,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895819166] [2020-09-25 09:11:50,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:50,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:11:50,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190625323] [2020-09-25 09:11:50,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:11:50,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:11:50,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:11:50,649 INFO L87 Difference]: Start difference. First operand 500 states and 604 transitions. Second operand 10 states. [2020-09-25 09:11:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:50,958 INFO L93 Difference]: Finished difference Result 724 states and 861 transitions. [2020-09-25 09:11:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:11:50,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 09:11:50,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:50,962 INFO L225 Difference]: With dead ends: 724 [2020-09-25 09:11:50,962 INFO L226 Difference]: Without dead ends: 722 [2020-09-25 09:11:50,963 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 09:11:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2020-09-25 09:11:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 552. [2020-09-25 09:11:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-09-25 09:11:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 668 transitions. [2020-09-25 09:11:51,007 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 668 transitions. Word has length 59 [2020-09-25 09:11:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:51,007 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 668 transitions. [2020-09-25 09:11:51,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:11:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 668 transitions. [2020-09-25 09:11:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:51,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:51,009 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 09:11:51,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 09:11:51,010 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:51,011 INFO L82 PathProgramCache]: Analyzing trace with hash 682149, now seen corresponding path program 3 times [2020-09-25 09:11:51,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:51,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572911364] [2020-09-25 09:11:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:51,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:52,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:52,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:52,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:52,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-09-25 09:11:52,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:52,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:52,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:52,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:52,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:52,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:52,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:52,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:52,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:52,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:52,860 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 09:11:52,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572911364] [2020-09-25 09:11:52,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:52,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:52,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814269089] [2020-09-25 09:11:52,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:52,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:52,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:52,865 INFO L87 Difference]: Start difference. First operand 552 states and 668 transitions. Second operand 11 states. [2020-09-25 09:11:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:53,305 INFO L93 Difference]: Finished difference Result 729 states and 875 transitions. [2020-09-25 09:11:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:11:53,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 09:11:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:53,310 INFO L225 Difference]: With dead ends: 729 [2020-09-25 09:11:53,310 INFO L226 Difference]: Without dead ends: 727 [2020-09-25 09:11:53,311 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 09:11:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-09-25 09:11:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 638. [2020-09-25 09:11:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-09-25 09:11:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 776 transitions. [2020-09-25 09:11:53,350 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 776 transitions. Word has length 59 [2020-09-25 09:11:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:53,350 INFO L479 AbstractCegarLoop]: Abstraction has 638 states and 776 transitions. [2020-09-25 09:11:53,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 776 transitions. [2020-09-25 09:11:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:53,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:53,352 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 09:11:53,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-25 09:11:53,352 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1565211309, now seen corresponding path program 5 times [2020-09-25 09:11:53,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:53,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263009389] [2020-09-25 09:11:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:55,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:55,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:55,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1665 [2020-09-25 09:11:55,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:55,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:55,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:11:55,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:55,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:55,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:55,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:55,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:55,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:55,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:55,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:55,132 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 09:11:55,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263009389] [2020-09-25 09:11:55,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:55,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:11:55,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133333129] [2020-09-25 09:11:55,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:11:55,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:11:55,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:11:55,135 INFO L87 Difference]: Start difference. First operand 638 states and 776 transitions. Second operand 10 states. [2020-09-25 09:11:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:55,531 INFO L93 Difference]: Finished difference Result 801 states and 958 transitions. [2020-09-25 09:11:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:11:55,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 09:11:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:55,536 INFO L225 Difference]: With dead ends: 801 [2020-09-25 09:11:55,537 INFO L226 Difference]: Without dead ends: 799 [2020-09-25 09:11:55,537 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 09:11:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2020-09-25 09:11:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 670. [2020-09-25 09:11:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-09-25 09:11:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 816 transitions. [2020-09-25 09:11:55,575 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 816 transitions. Word has length 59 [2020-09-25 09:11:55,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:55,576 INFO L479 AbstractCegarLoop]: Abstraction has 670 states and 816 transitions. [2020-09-25 09:11:55,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:11:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 816 transitions. [2020-09-25 09:11:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:11:55,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:55,578 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 09:11:55,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-25 09:11:55,579 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash -335545933, now seen corresponding path program 4 times [2020-09-25 09:11:55,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:55,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463999840] [2020-09-25 09:11:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:55,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:57,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:57,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:11:57,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:11:57,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1715 [2020-09-25 09:11:57,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:57,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:57,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:57,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:11:57,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:57,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:57,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:57,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:57,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:57,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:57,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:57,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:57,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:57,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:57,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:57,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:57,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:57,423 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 09:11:57,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463999840] [2020-09-25 09:11:57,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:57,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:57,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481027546] [2020-09-25 09:11:57,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:57,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:57,425 INFO L87 Difference]: Start difference. First operand 670 states and 816 transitions. Second operand 11 states. [2020-09-25 09:11:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:57,754 INFO L93 Difference]: Finished difference Result 865 states and 1047 transitions. [2020-09-25 09:11:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:11:57,755 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 09:11:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:57,759 INFO L225 Difference]: With dead ends: 865 [2020-09-25 09:11:57,759 INFO L226 Difference]: Without dead ends: 863 [2020-09-25 09:11:57,759 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 09:11:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-09-25 09:11:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 755. [2020-09-25 09:11:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-09-25 09:11:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 921 transitions. [2020-09-25 09:11:57,804 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 921 transitions. Word has length 59 [2020-09-25 09:11:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:57,804 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 921 transitions. [2020-09-25 09:11:57,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 921 transitions. [2020-09-25 09:11:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 09:11:57,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:57,806 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 09:11:57,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-25 09:11:57,806 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:57,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1951488799, now seen corresponding path program 2 times [2020-09-25 09:11:57,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:57,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766125074] [2020-09-25 09:11:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:57,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:57,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:58,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:59,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:59,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 09:11:59,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:11:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-09-25 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 09:11:59,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:59,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:59,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:59,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:59,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:59,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:59,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:59,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:59,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:59,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 09:11:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:59,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:59,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:59,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:59,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:59,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:59,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:59,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:59,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:59,648 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 09:11:59,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766125074] [2020-09-25 09:11:59,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:59,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:59,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300155796] [2020-09-25 09:11:59,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:59,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:59,650 INFO L87 Difference]: Start difference. First operand 755 states and 921 transitions. Second operand 11 states. [2020-09-25 09:12:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:12:00,015 INFO L93 Difference]: Finished difference Result 825 states and 996 transitions. [2020-09-25 09:12:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:12:00,016 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-25 09:12:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:12:00,020 INFO L225 Difference]: With dead ends: 825 [2020-09-25 09:12:00,021 INFO L226 Difference]: Without dead ends: 823 [2020-09-25 09:12:00,021 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 09:12:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2020-09-25 09:12:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 755. [2020-09-25 09:12:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-09-25 09:12:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 921 transitions. [2020-09-25 09:12:00,067 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 921 transitions. Word has length 60 [2020-09-25 09:12:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:12:00,068 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 921 transitions. [2020-09-25 09:12:00,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:12:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 921 transitions. [2020-09-25 09:12:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:12:00,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:12:00,069 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 09:12:00,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-25 09:12:00,070 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:12:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:12:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463589, now seen corresponding path program 5 times [2020-09-25 09:12:00,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:12:00,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046681171] [2020-09-25 09:12:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:12:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:12:00,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:00,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:00,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:00,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:00,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:00,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:01,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:12:01,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:12:01,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:12:01,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1684 [2020-09-25 09:12:01,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:12:01,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:12:01,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:12:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:12:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:12:01,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:12:01,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:12:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:12:01,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:01,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:12:01,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:12:01,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:12:01,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:12:01,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:12:01,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:12:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:12:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:12:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:12:01,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:12:01,876 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 09:12:01,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046681171] [2020-09-25 09:12:01,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:12:01,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:12:01,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291902025] [2020-09-25 09:12:01,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:12:01,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:12:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:12:01,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:12:01,878 INFO L87 Difference]: Start difference. First operand 755 states and 921 transitions. Second operand 11 states. [2020-09-25 09:12:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:12:02,240 INFO L93 Difference]: Finished difference Result 907 states and 1099 transitions. [2020-09-25 09:12:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:12:02,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 09:12:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:12:02,246 INFO L225 Difference]: With dead ends: 907 [2020-09-25 09:12:02,246 INFO L226 Difference]: Without dead ends: 905 [2020-09-25 09:12:02,247 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 09:12:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2020-09-25 09:12:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 821. [2020-09-25 09:12:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-09-25 09:12:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1003 transitions. [2020-09-25 09:12:02,292 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1003 transitions. Word has length 59 [2020-09-25 09:12:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:12:02,293 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1003 transitions. [2020-09-25 09:12:02,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:12:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1003 transitions. [2020-09-25 09:12:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:12:02,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:12:02,294 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 09:12:02,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-25 09:12:02,295 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:12:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:12:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2112571323, now seen corresponding path program 4 times [2020-09-25 09:12:02,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:12:02,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171337497] [2020-09-25 09:12:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:12:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:12:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:02,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:02,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:02,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:02,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:03,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:12:03,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:12:03,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:12:03,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-09-25 09:12:03,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:12:03,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:12:03,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:12:03,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:12:03,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:12:03,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:12:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:12:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:12:03,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:03,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:12:03,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:12:03,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:12:03,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:12:03,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:12:03,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:12:03,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:12:03,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:12:03,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:12:03,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:12:03,852 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 09:12:03,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171337497] [2020-09-25 09:12:03,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:12:03,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:12:03,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6105690] [2020-09-25 09:12:03,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:12:03,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:12:03,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:12:03,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:12:03,855 INFO L87 Difference]: Start difference. First operand 821 states and 1003 transitions. Second operand 10 states. [2020-09-25 09:12:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:12:04,198 INFO L93 Difference]: Finished difference Result 1082 states and 1306 transitions. [2020-09-25 09:12:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:12:04,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 09:12:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:12:04,205 INFO L225 Difference]: With dead ends: 1082 [2020-09-25 09:12:04,205 INFO L226 Difference]: Without dead ends: 1080 [2020-09-25 09:12:04,206 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 09:12:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2020-09-25 09:12:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 873. [2020-09-25 09:12:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-09-25 09:12:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1067 transitions. [2020-09-25 09:12:04,244 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1067 transitions. Word has length 59 [2020-09-25 09:12:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:12:04,245 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1067 transitions. [2020-09-25 09:12:04,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:12:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1067 transitions. [2020-09-25 09:12:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:12:04,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:12:04,246 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 09:12:04,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-25 09:12:04,247 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:12:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:12:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 616502515, now seen corresponding path program 6 times [2020-09-25 09:12:04,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:12:04,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855752468] [2020-09-25 09:12:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:12:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:12:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:04,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:04,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:12:06,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 09:12:06,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:12:06,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1762 [2020-09-25 09:12:06,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:12:06,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:12:06,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:12:06,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:12:06,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 09:12:06,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:12:06,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:12:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:12:06,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:12:06,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:12:06,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:12:06,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:12:06,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:12:06,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:12:06,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:12:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:12:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:12:06,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:12:06,133 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 09:12:06,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855752468] [2020-09-25 09:12:06,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:12:06,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:12:06,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524991369] [2020-09-25 09:12:06,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:12:06,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:12:06,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:12:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:12:06,135 INFO L87 Difference]: Start difference. First operand 873 states and 1067 transitions. Second operand 11 states. [2020-09-25 09:12:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:12:06,659 INFO L93 Difference]: Finished difference Result 1095 states and 1329 transitions. [2020-09-25 09:12:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:12:06,660 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 09:12:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:12:06,665 INFO L225 Difference]: With dead ends: 1095 [2020-09-25 09:12:06,665 INFO L226 Difference]: Without dead ends: 1093 [2020-09-25 09:12:06,666 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 09:12:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2020-09-25 09:12:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 970. [2020-09-25 09:12:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-09-25 09:12:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1189 transitions. [2020-09-25 09:12:06,707 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1189 transitions. Word has length 59 [2020-09-25 09:12:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:12:06,708 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1189 transitions. [2020-09-25 09:12:06,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:12:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1189 transitions. [2020-09-25 09:12:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 09:12:06,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:12:06,709 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 09:12:06,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-25 09:12:06,709 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:12:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:12:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1846167891, now seen corresponding path program 5 times [2020-09-25 09:12:06,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:12:06,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815011645] [2020-09-25 09:12:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:12:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:12:06,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:12:06,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking...