/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condm.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:06:22,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:06:22,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:06:22,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:06:22,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:06:22,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:06:22,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:06:22,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:06:22,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:06:22,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:06:22,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:06:22,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:06:22,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:06:22,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:06:22,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:06:22,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:06:22,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:06:22,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:06:22,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:06:22,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:06:22,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:06:22,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:06:22,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:06:22,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:06:22,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:06:22,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:06:22,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:06:22,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:06:22,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:06:22,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:06:22,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:06:22,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:06:22,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:06:22,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:06:22,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:06:22,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:06:22,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:06:22,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:06:22,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:06:22,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:06:22,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:06:22,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:06:22,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:06:22,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:06:22,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:06:22,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:06:22,240 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:06:22,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:06:22,241 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:06:22,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:06:22,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:06:22,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:06:22,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:06:22,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:06:22,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:06:22,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:06:22,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:06:22,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:06:22,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:06:22,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:06:22,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:06:22,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:06:22,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:06:22,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:06:22,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:06:22,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:06:22,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:06:22,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:06:22,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:06:22,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:06:22,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:06:22,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:06:22,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:06:22,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:06:22,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:06:22,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:06:22,565 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:06:22,566 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condm.c [2020-10-13 05:06:22,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66cbb54c0/531d61d0cbd94b01859b378889acfc23/FLAG148aef3f1 [2020-10-13 05:06:23,079 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:06:23,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condm.c [2020-10-13 05:06:23,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66cbb54c0/531d61d0cbd94b01859b378889acfc23/FLAG148aef3f1 [2020-10-13 05:06:23,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66cbb54c0/531d61d0cbd94b01859b378889acfc23 [2020-10-13 05:06:23,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:06:23,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:06:23,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:06:23,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:06:23,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:06:23,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434f45a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23, skipping insertion in model container [2020-10-13 05:06:23,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:06:23,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:06:23,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:06:23,690 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:06:23,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:06:23,728 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:06:23,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23 WrapperNode [2020-10-13 05:06:23,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:06:23,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:06:23,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:06:23,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:06:23,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... [2020-10-13 05:06:23,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:06:23,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:06:23,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:06:23,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:06:23,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:06:23,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:06:23,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:06:23,942 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:06:23,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:06:23,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:06:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:06:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:06:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:06:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:06:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:06:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:06:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:06:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:06:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:06:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:06:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:06:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:06:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:06:24,215 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:06:24,215 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:06:24,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:06:24 BoogieIcfgContainer [2020-10-13 05:06:24,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:06:24,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:06:24,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:06:24,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:06:24,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:06:23" (1/3) ... [2020-10-13 05:06:24,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2e7ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:06:24, skipping insertion in model container [2020-10-13 05:06:24,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:23" (2/3) ... [2020-10-13 05:06:24,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2e7ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:06:24, skipping insertion in model container [2020-10-13 05:06:24,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:06:24" (3/3) ... [2020-10-13 05:06:24,227 INFO L109 eAbstractionObserver]: Analyzing ICFG condm.c [2020-10-13 05:06:24,241 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:06:24,249 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:06:24,265 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:06:24,296 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:06:24,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:06:24,296 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:06:24,296 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:06:24,297 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:06:24,297 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:06:24,297 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:06:24,297 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:06:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 05:06:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:06:24,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:24,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:24,355 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1524373234, now seen corresponding path program 1 times [2020-10-13 05:06:24,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:24,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103465983] [2020-10-13 05:06:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:24,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:24,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:24,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:24,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:25,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 05:06:25,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:06:25,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-13 05:06:25,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:25,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:06:25,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:25,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:06:25,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:25,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:25,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:25,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:06:25,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:25,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:25,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:25,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:25,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:25,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:25,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:25,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:06:25,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:06:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:25,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:25,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103465983] [2020-10-13 05:06:25,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:06:25,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:06:25,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066863868] [2020-10-13 05:06:25,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:06:25,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:06:25,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:06:25,472 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 05:06:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:25,632 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-13 05:06:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:06:25,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-13 05:06:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:25,643 INFO L225 Difference]: With dead ends: 60 [2020-10-13 05:06:25,644 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 05:06:25,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:06:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 05:06:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 05:06:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:06:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 05:06:25,684 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-10-13 05:06:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:25,684 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 05:06:25,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:06:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 05:06:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:06:25,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:25,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:25,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:06:25,686 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2111179248, now seen corresponding path program 1 times [2020-10-13 05:06:25,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:25,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124208837] [2020-10-13 05:06:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:25,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:25,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 05:06:25,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:06:25,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-13 05:06:25,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:25,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:06:25,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 05:06:25,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:06:25,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:26,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:26,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:26,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:26,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:26,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:26,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:26,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:26,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:26,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:26,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:26,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:26,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:26,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:26,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:26,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:26,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:26,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:26,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124208837] [2020-10-13 05:06:26,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:06:26,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:06:26,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011846031] [2020-10-13 05:06:26,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:06:26,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:06:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:06:26,041 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-10-13 05:06:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:26,231 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-13 05:06:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:06:26,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 05:06:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:26,235 INFO L225 Difference]: With dead ends: 57 [2020-10-13 05:06:26,235 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 05:06:26,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:06:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 05:06:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-13 05:06:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:06:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 05:06:26,249 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-10-13 05:06:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:26,250 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 05:06:26,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:06:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 05:06:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:06:26,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:26,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:26,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:06:26,252 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:26,252 INFO L82 PathProgramCache]: Analyzing trace with hash 373909448, now seen corresponding path program 1 times [2020-10-13 05:06:26,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:26,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902687861] [2020-10-13 05:06:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:26,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:27,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:28,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:06:28,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:06:28,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2488 [2020-10-13 05:06:28,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:06:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:06:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:06:28,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:28,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:28,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:28,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:28,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:28,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:28,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:28,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:28,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:28,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:28,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:28,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:28,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:28,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:28,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:28,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:28,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:28,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:06:28,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902687861] [2020-10-13 05:06:28,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:28,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:06:28,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175062879] [2020-10-13 05:06:28,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:06:28,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:28,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:06:28,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:06:28,904 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-10-13 05:06:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:29,107 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-13 05:06:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:06:29,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 05:06:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:29,110 INFO L225 Difference]: With dead ends: 55 [2020-10-13 05:06:29,110 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 05:06:29,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:06:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 05:06:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-10-13 05:06:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:06:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-13 05:06:29,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-10-13 05:06:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:29,120 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-13 05:06:29,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:06:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-13 05:06:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:06:29,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:29,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:29,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:06:29,122 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:29,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1053967818, now seen corresponding path program 1 times [2020-10-13 05:06:29,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:29,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258113254] [2020-10-13 05:06:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:29,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:29,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:29,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:29,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:06:29,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:06:29,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-13 05:06:29,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:06:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:06:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 05:06:29,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:30,007 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2020-10-13 05:06:30,521 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 25 [2020-10-13 05:06:30,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:30,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:30,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:30,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:30,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:30,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:30,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:30,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:30,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:30,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:30,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:30,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:30,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:30,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:30,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258113254] [2020-10-13 05:06:30,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:30,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:06:30,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467136795] [2020-10-13 05:06:30,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:06:30,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:06:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:06:30,620 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 14 states. [2020-10-13 05:06:31,313 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-13 05:06:31,575 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-13 05:06:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:32,130 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-13 05:06:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:06:32,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-10-13 05:06:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:32,133 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:06:32,133 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 05:06:32,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:06:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 05:06:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-13 05:06:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 05:06:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 05:06:32,143 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2020-10-13 05:06:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:32,144 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 05:06:32,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:06:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 05:06:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:06:32,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:32,146 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] [2020-10-13 05:06:32,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:06:32,146 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1478774514, now seen corresponding path program 2 times [2020-10-13 05:06:32,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:32,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165433774] [2020-10-13 05:06:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:32,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:33,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:33,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:33,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:06:33,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:06:33,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-13 05:06:33,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:33,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:06:33,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:06:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:33,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:33,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:33,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:33,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:33,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:33,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:33,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:33,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:33,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:33,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:33,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:33,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:33,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:33,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:33,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:33,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:33,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:33,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:33,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:33,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:06:33,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165433774] [2020-10-13 05:06:33,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:33,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:06:33,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595832373] [2020-10-13 05:06:33,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:06:33,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:06:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:06:33,756 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 8 states. [2020-10-13 05:06:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:33,999 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-13 05:06:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:06:34,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 05:06:34,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:34,003 INFO L225 Difference]: With dead ends: 95 [2020-10-13 05:06:34,003 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:06:34,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:06:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:06:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2020-10-13 05:06:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:06:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-13 05:06:34,015 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 30 [2020-10-13 05:06:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:34,016 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-13 05:06:34,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:06:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-13 05:06:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:06:34,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:34,017 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] [2020-10-13 05:06:34,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:06:34,018 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash -540550706, now seen corresponding path program 2 times [2020-10-13 05:06:34,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:34,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813818239] [2020-10-13 05:06:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:34,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:34,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:34,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:34,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:34,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:35,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:35,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:35,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:35,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:06:35,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:06:35,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1740 [2020-10-13 05:06:35,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:35,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:06:35,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:06:35,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:06:35,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:36,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:36,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:36,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:36,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:36,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:36,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:36,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:36,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:36,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:36,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:36,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:36,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:36,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:36,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:36,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:06:36,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813818239] [2020-10-13 05:06:36,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:36,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:06:36,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107655341] [2020-10-13 05:06:36,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:06:36,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:06:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:06:36,045 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 8 states. [2020-10-13 05:06:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:36,250 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-10-13 05:06:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:06:36,250 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 05:06:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:36,252 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:06:36,252 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:06:36,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:06:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:06:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-13 05:06:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:06:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-13 05:06:36,272 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 30 [2020-10-13 05:06:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:36,274 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-13 05:06:36,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:06:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-13 05:06:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:06:36,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:36,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:36,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:06:36,277 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:36,279 INFO L82 PathProgramCache]: Analyzing trace with hash -800892852, now seen corresponding path program 3 times [2020-10-13 05:06:36,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:36,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470626687] [2020-10-13 05:06:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:36,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:36,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:06:36,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:36,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-13 05:06:36,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:06:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:06:36,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:06:36,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:37,265 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2020-10-13 05:06:37,413 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-10-13 05:06:37,558 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2020-10-13 05:06:38,185 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 16 [2020-10-13 05:06:38,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:38,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:38,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:38,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:38,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:38,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:38,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:38,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:38,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:38,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:38,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:38,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:38,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:38,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:38,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470626687] [2020-10-13 05:06:38,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:38,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:06:38,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655614574] [2020-10-13 05:06:38,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:06:38,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:06:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:06:38,270 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 18 states. [2020-10-13 05:06:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:40,671 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2020-10-13 05:06:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:06:40,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-10-13 05:06:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:40,673 INFO L225 Difference]: With dead ends: 113 [2020-10-13 05:06:40,673 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 05:06:40,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:06:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 05:06:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2020-10-13 05:06:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:06:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-13 05:06:40,687 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 32 [2020-10-13 05:06:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:40,688 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-13 05:06:40,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:06:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-13 05:06:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:06:40,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:40,689 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:40,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:06:40,690 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:40,690 INFO L82 PathProgramCache]: Analyzing trace with hash -503605430, now seen corresponding path program 3 times [2020-10-13 05:06:40,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:40,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293629831] [2020-10-13 05:06:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:40,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:40,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:41,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:42,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:06:42,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:06:42,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-13 05:06:42,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:06:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:06:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:06:42,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:42,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:42,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:42,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:42,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:42,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:42,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:42,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:42,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:42,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:42,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:42,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:42,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:42,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:42,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:42,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:06:42,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293629831] [2020-10-13 05:06:42,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:42,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:06:42,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428631748] [2020-10-13 05:06:42,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:06:42,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:06:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:06:42,224 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 8 states. [2020-10-13 05:06:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:42,450 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-13 05:06:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:06:42,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-13 05:06:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:42,452 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:06:42,452 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:06:42,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:06:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:06:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-13 05:06:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:06:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-13 05:06:42,466 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 33 [2020-10-13 05:06:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:42,467 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-13 05:06:42,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:06:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-13 05:06:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:06:42,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:42,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:42,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:06:42,474 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash -325598710, now seen corresponding path program 4 times [2020-10-13 05:06:42,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:42,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186015361] [2020-10-13 05:06:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:42,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:44,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:06:44,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:06:44,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-13 05:06:44,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:44,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:06:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:06:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:06:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:44,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:44,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:44,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:44,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:44,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:44,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:44,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:44,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:44,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:44,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:44,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:44,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:44,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:44,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:06:44,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:44,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:44,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:44,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:44,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:06:44,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186015361] [2020-10-13 05:06:44,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:44,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:06:44,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812222721] [2020-10-13 05:06:44,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:06:44,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:06:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:06:44,486 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 9 states. [2020-10-13 05:06:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:44,816 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-13 05:06:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:06:44,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 05:06:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:44,818 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:06:44,818 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:06:44,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:06:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:06:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-13 05:06:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:06:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-13 05:06:44,829 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 35 [2020-10-13 05:06:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:44,829 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-13 05:06:44,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:06:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-13 05:06:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:06:44,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:44,830 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:06:44,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:06:44,831 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash 612625098, now seen corresponding path program 1 times [2020-10-13 05:06:44,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:44,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480880152] [2020-10-13 05:06:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:44,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:45,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:45,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:45,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:06:45,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:06:45,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-13 05:06:45,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:45,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:06:45,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:06:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:06:45,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:45,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:45,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:45,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:45,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:45,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:45,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:45,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:45,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:45,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:45,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:45,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:45,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:45,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:45,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:06:45,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480880152] [2020-10-13 05:06:45,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:06:45,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:06:45,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637039821] [2020-10-13 05:06:45,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:06:45,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:45,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:06:45,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:06:45,945 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 4 states. [2020-10-13 05:06:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:46,052 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-10-13 05:06:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:06:46,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-13 05:06:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:46,053 INFO L225 Difference]: With dead ends: 91 [2020-10-13 05:06:46,054 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 05:06:46,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:06:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 05:06:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-10-13 05:06:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:06:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-10-13 05:06:46,067 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 35 [2020-10-13 05:06:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:46,068 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-10-13 05:06:46,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:06:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-10-13 05:06:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:06:46,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:46,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:46,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:06:46,070 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:46,070 INFO L82 PathProgramCache]: Analyzing trace with hash -667238580, now seen corresponding path program 4 times [2020-10-13 05:06:46,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:46,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951590879] [2020-10-13 05:06:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:47,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:48,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:48,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:06:48,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:06:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2688 [2020-10-13 05:06:48,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:06:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:48,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:06:48,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:48,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:48,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:48,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:48,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:48,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:48,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:48,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:48,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:48,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:48,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:48,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:48,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:48,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:48,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:48,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:48,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:48,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:48,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:48,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:48,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 05:06:48,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951590879] [2020-10-13 05:06:48,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:48,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:06:48,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355678641] [2020-10-13 05:06:48,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:06:48,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:48,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:06:48,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:06:48,975 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 8 states. [2020-10-13 05:06:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:49,336 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2020-10-13 05:06:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:06:49,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:06:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:49,339 INFO L225 Difference]: With dead ends: 133 [2020-10-13 05:06:49,339 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 05:06:49,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:06:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 05:06:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 66. [2020-10-13 05:06:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:06:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-13 05:06:49,362 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 35 [2020-10-13 05:06:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:49,363 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-13 05:06:49,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:06:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-13 05:06:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:06:49,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:49,364 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:49,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:06:49,364 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:49,364 INFO L82 PathProgramCache]: Analyzing trace with hash 995094222, now seen corresponding path program 5 times [2020-10-13 05:06:49,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:49,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063974347] [2020-10-13 05:06:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:49,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:50,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:50,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:51,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:51,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:06:51,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:06:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2332 [2020-10-13 05:06:51,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:06:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:06:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 05:06:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:52,950 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 17 [2020-10-13 05:06:53,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:53,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:53,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:53,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:53,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:53,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:53,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:53,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:53,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063974347] [2020-10-13 05:06:53,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:53,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:06:53,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139939836] [2020-10-13 05:06:53,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:06:53,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:06:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:06:53,057 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 21 states. [2020-10-13 05:06:54,165 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-13 05:06:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:55,467 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-13 05:06:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:06:55,468 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-13 05:06:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:55,470 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:06:55,470 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 05:06:55,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:06:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 05:06:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2020-10-13 05:06:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:06:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-13 05:06:55,481 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 37 [2020-10-13 05:06:55,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:55,482 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-13 05:06:55,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:06:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-13 05:06:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:06:55,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:55,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:55,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:06:55,483 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1344989300, now seen corresponding path program 5 times [2020-10-13 05:06:55,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:55,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245807514] [2020-10-13 05:06:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:55,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:55,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:55,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:56,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:56,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:06:56,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:06:56,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-13 05:06:56,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:06:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:06:56,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:56,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:56,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:56,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:56,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:56,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:56,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:56,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:56,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:56,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:56,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:56,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:56,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:06:56,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245807514] [2020-10-13 05:06:56,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:56,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:06:56,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386673607] [2020-10-13 05:06:56,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:06:56,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:06:56,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:06:56,680 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 10 states. [2020-10-13 05:06:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:56,985 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2020-10-13 05:06:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:06:56,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 05:06:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:56,993 INFO L225 Difference]: With dead ends: 123 [2020-10-13 05:06:56,993 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 05:06:56,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:06:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 05:06:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-13 05:06:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 05:06:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-13 05:06:57,011 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 38 [2020-10-13 05:06:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:57,011 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-13 05:06:57,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:06:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-13 05:06:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:06:57,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:57,012 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] [2020-10-13 05:06:57,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:06:57,013 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1468226466, now seen corresponding path program 1 times [2020-10-13 05:06:57,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:57,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995663582] [2020-10-13 05:06:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:57,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:57,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:57,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:57,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:06:57,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:57,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-13 05:06:57,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:06:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:06:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:06:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:58,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:58,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:58,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:58,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:58,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:58,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:58,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:58,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:58,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:58,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:58,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:58,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:58,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:58,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:58,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:58,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:58,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:58,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:58,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:58,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:58,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:58,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:58,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 05:06:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:58,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:58,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:58,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:58,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:58,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:06:58,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:58,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:06:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:58,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:06:58,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:06:58,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995663582] [2020-10-13 05:06:58,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:58,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:06:58,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499307150] [2020-10-13 05:06:58,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:06:58,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:58,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:06:58,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:06:58,198 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 17 states. [2020-10-13 05:06:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:59,598 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-10-13 05:06:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:06:59,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 05:06:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:59,600 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:06:59,600 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:06:59,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:06:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:06:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-13 05:06:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:06:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-13 05:06:59,612 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 40 [2020-10-13 05:06:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:59,612 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-13 05:06:59,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:06:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-13 05:06:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:06:59,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:59,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:59,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:06:59,613 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash 238592202, now seen corresponding path program 6 times [2020-10-13 05:06:59,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:59,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730371190] [2020-10-13 05:06:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:00,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:01,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:07:01,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:07:01,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2319 [2020-10-13 05:07:01,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:07:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:07:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:02,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:02,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:02,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:02,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:02,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:02,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:02,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:02,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:02,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:02,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:02,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:07:02,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730371190] [2020-10-13 05:07:02,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:02,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:07:02,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32329125] [2020-10-13 05:07:02,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:07:02,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:07:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:07:02,088 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 9 states. [2020-10-13 05:07:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:02,568 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2020-10-13 05:07:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:07:02,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-13 05:07:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:02,571 INFO L225 Difference]: With dead ends: 145 [2020-10-13 05:07:02,571 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 05:07:02,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 05:07:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 79. [2020-10-13 05:07:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:07:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-10-13 05:07:02,583 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 40 [2020-10-13 05:07:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:02,583 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-10-13 05:07:02,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:07:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-10-13 05:07:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:07:02,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:02,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:02,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:07:02,585 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2097192374, now seen corresponding path program 6 times [2020-10-13 05:07:02,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:02,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698862993] [2020-10-13 05:07:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:02,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:03,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:03,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:03,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4425 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:07:07,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:07:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:07,185 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 20 [2020-10-13 05:07:07,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:07,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:07,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:07,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:07,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:07,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:07,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:07,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:07,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:07:07,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698862993] [2020-10-13 05:07:07,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:07,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:07:07,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240492906] [2020-10-13 05:07:07,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:07:07,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:07:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:07:07,436 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 10 states. [2020-10-13 05:07:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:07,894 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2020-10-13 05:07:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:07:07,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 05:07:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:07,895 INFO L225 Difference]: With dead ends: 116 [2020-10-13 05:07:07,895 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 05:07:07,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:07:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 05:07:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2020-10-13 05:07:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:07:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-13 05:07:07,906 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 40 [2020-10-13 05:07:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:07,907 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-13 05:07:07,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:07:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-13 05:07:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:07:07,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:07,908 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:07,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:07:07,908 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:07,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1641992840, now seen corresponding path program 7 times [2020-10-13 05:07:07,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:07,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546835472] [2020-10-13 05:07:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:08,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:07:08,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:09,015 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-10-13 05:07:10,565 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 16 [2020-10-13 05:07:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:10,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:10,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:10,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:10,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:10,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:10,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:10,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:10,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546835472] [2020-10-13 05:07:10,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:10,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:07:10,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70858683] [2020-10-13 05:07:10,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:07:10,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:07:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:07:10,684 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 23 states. [2020-10-13 05:07:11,941 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 05:07:12,797 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-13 05:07:13,061 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 05:07:13,357 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-13 05:07:13,505 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-13 05:07:14,907 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-13 05:07:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:15,090 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-10-13 05:07:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:07:15,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-13 05:07:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:15,093 INFO L225 Difference]: With dead ends: 121 [2020-10-13 05:07:15,093 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 05:07:15,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=376, Invalid=2704, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:07:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 05:07:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2020-10-13 05:07:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:07:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2020-10-13 05:07:15,107 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 42 [2020-10-13 05:07:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:15,108 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2020-10-13 05:07:15,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:07:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2020-10-13 05:07:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:07:15,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:15,109 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:15,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:07:15,109 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1653641906, now seen corresponding path program 7 times [2020-10-13 05:07:15,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:15,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25575794] [2020-10-13 05:07:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:15,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:16,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:18,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:19,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:20,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:07:20,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:07:20,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:07:20,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:20,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:07:20,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:20,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:07:20,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:20,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:20,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:20,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:20,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:20,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:20,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:20,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:20,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:20,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:20,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:20,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:20,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:20,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:20,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:20,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:07:20,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25575794] [2020-10-13 05:07:20,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:20,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:07:20,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644996814] [2020-10-13 05:07:20,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:07:20,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:07:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:07:20,246 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand 12 states. [2020-10-13 05:07:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:20,671 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2020-10-13 05:07:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:20,673 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 05:07:20,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:20,675 INFO L225 Difference]: With dead ends: 146 [2020-10-13 05:07:20,675 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 05:07:20,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:07:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 05:07:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2020-10-13 05:07:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 05:07:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-10-13 05:07:20,691 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 43 [2020-10-13 05:07:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:20,691 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-10-13 05:07:20,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:07:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-10-13 05:07:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:07:20,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:20,692 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:07:20,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:07:20,692 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:20,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1515868196, now seen corresponding path program 1 times [2020-10-13 05:07:20,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:20,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14205920] [2020-10-13 05:07:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:20,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:20,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:21,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:21,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:21,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:22,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:22,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:23,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:07:23,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:07:23,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3241 [2020-10-13 05:07:23,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:07:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:07:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:07:23,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:25,286 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 24 [2020-10-13 05:07:25,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:25,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:25,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:25,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:25,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:25,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:25,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:25,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:25,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 05:07:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:25,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:25,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:25,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:25,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:07:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:07:25,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14205920] [2020-10-13 05:07:25,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:25,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:07:25,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700031363] [2020-10-13 05:07:25,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:07:25,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:07:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:07:25,401 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 20 states. [2020-10-13 05:07:27,556 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-13 05:07:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:28,038 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2020-10-13 05:07:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:07:28,039 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-13 05:07:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:28,040 INFO L225 Difference]: With dead ends: 155 [2020-10-13 05:07:28,041 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 05:07:28,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:07:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 05:07:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-13 05:07:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 05:07:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2020-10-13 05:07:28,057 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 45 [2020-10-13 05:07:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:28,057 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2020-10-13 05:07:28,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:07:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2020-10-13 05:07:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:07:28,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:28,058 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:28,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:07:28,058 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:28,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1756188238, now seen corresponding path program 8 times [2020-10-13 05:07:28,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:28,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836516711] [2020-10-13 05:07:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:28,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:28,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:30,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:07:30,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:07:30,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2287 [2020-10-13 05:07:30,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:07:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:07:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:07:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:30,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:30,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:30,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:30,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:30,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:30,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:30,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:30,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:30,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:30,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:30,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:30,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:30,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:30,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:30,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:07:30,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836516711] [2020-10-13 05:07:30,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:30,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:07:30,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740724775] [2020-10-13 05:07:30,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:07:30,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:07:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:07:30,575 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand 11 states. [2020-10-13 05:07:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:31,151 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2020-10-13 05:07:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:07:31,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 05:07:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:31,153 INFO L225 Difference]: With dead ends: 137 [2020-10-13 05:07:31,153 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 05:07:31,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:07:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 05:07:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2020-10-13 05:07:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 05:07:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-13 05:07:31,169 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 45 [2020-10-13 05:07:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:31,170 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-13 05:07:31,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:07:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-13 05:07:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:07:31,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:31,170 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:31,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:07:31,171 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash -156894512, now seen corresponding path program 8 times [2020-10-13 05:07:31,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:31,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548864159] [2020-10-13 05:07:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:31,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:36,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:07:36,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 05:07:36,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4989 [2020-10-13 05:07:36,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:07:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 05:07:36,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:36,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:36,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:36,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:36,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:36,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:36,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:36,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:36,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:36,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:36,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:36,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:36,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:36,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:36,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:36,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:36,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:07:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 05:07:36,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548864159] [2020-10-13 05:07:36,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:36,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:07:36,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63966559] [2020-10-13 05:07:36,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:07:36,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:36,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:07:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:07:36,547 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 10 states. [2020-10-13 05:07:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:37,456 INFO L93 Difference]: Finished difference Result 251 states and 282 transitions. [2020-10-13 05:07:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:07:37,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 05:07:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:37,460 INFO L225 Difference]: With dead ends: 251 [2020-10-13 05:07:37,460 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 05:07:37,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:07:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 05:07:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 116. [2020-10-13 05:07:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 05:07:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2020-10-13 05:07:37,478 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 45 [2020-10-13 05:07:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:37,478 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2020-10-13 05:07:37,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:07:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2020-10-13 05:07:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:07:37,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:37,479 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:37,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:07:37,479 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash -596693038, now seen corresponding path program 9 times [2020-10-13 05:07:37,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:37,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343821221] [2020-10-13 05:07:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:37,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:37,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:41,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:07:41,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:07:41,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3962 [2020-10-13 05:07:41,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:07:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:07:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:07:41,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:42,019 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-13 05:07:42,888 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 59 [2020-10-13 05:07:43,316 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 50 [2020-10-13 05:07:43,724 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 30 [2020-10-13 05:07:44,173 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 34 [2020-10-13 05:07:44,432 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 29 [2020-10-13 05:07:44,707 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 35 [2020-10-13 05:07:44,947 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-10-13 05:07:45,123 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-13 05:07:45,296 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 27 [2020-10-13 05:07:46,255 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 19 [2020-10-13 05:07:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:46,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:46,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:46,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:46,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:46,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:46,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:46,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:46,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:46,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:46,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:46,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:46,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343821221] [2020-10-13 05:07:46,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:46,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:07:46,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145980089] [2020-10-13 05:07:46,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:07:46,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:46,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:07:46,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:07:46,402 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 26 states. [2020-10-13 05:07:46,737 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-13 05:07:47,054 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-13 05:07:47,266 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 05:07:47,867 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-13 05:07:48,171 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-13 05:07:48,649 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-13 05:07:48,874 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-13 05:07:49,441 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 45 [2020-10-13 05:07:49,986 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 43 [2020-10-13 05:07:50,431 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2020-10-13 05:07:50,717 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2020-10-13 05:07:51,081 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 49 [2020-10-13 05:07:51,510 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 55 [2020-10-13 05:07:51,973 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 46 [2020-10-13 05:07:52,606 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 37 [2020-10-13 05:07:52,981 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-13 05:07:53,298 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-13 05:07:53,849 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-13 05:07:54,023 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 33 [2020-10-13 05:07:54,392 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-13 05:07:54,723 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-10-13 05:07:55,154 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 27 [2020-10-13 05:07:55,728 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 27 [2020-10-13 05:07:56,194 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 28 [2020-10-13 05:07:56,357 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2020-10-13 05:07:56,580 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-10-13 05:07:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:56,770 INFO L93 Difference]: Finished difference Result 240 states and 269 transitions. [2020-10-13 05:07:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 05:07:56,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2020-10-13 05:07:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:56,774 INFO L225 Difference]: With dead ends: 240 [2020-10-13 05:07:56,774 INFO L226 Difference]: Without dead ends: 238 [2020-10-13 05:07:56,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=645, Invalid=5207, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 05:07:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-13 05:07:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 119. [2020-10-13 05:07:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 05:07:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2020-10-13 05:07:56,799 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 47 [2020-10-13 05:07:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:56,799 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2020-10-13 05:07:56,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:07:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2020-10-13 05:07:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:07:56,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:56,800 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:56,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:07:56,800 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2137191624, now seen corresponding path program 9 times [2020-10-13 05:07:56,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:56,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247512974] [2020-10-13 05:07:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:56,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:56,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:58,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:07:58,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:58,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-13 05:07:58,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:07:58,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:59,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:59,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:59,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:59,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:59,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:59,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:59,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 48 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:07:59,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247512974] [2020-10-13 05:07:59,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:59,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:07:59,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899317427] [2020-10-13 05:07:59,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:07:59,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:59,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:07:59,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:59,062 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 14 states. [2020-10-13 05:07:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:59,733 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2020-10-13 05:07:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:07:59,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-13 05:07:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:59,737 INFO L225 Difference]: With dead ends: 197 [2020-10-13 05:07:59,737 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 05:07:59,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:07:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 05:07:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 153. [2020-10-13 05:07:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 05:07:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 168 transitions. [2020-10-13 05:07:59,764 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 168 transitions. Word has length 48 [2020-10-13 05:07:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:59,765 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 168 transitions. [2020-10-13 05:07:59,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:07:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 168 transitions. [2020-10-13 05:07:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:07:59,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:59,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-13 05:07:59,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:07:59,766 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2064570846, now seen corresponding path program 2 times [2020-10-13 05:07:59,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:59,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842765440] [2020-10-13 05:07:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:59,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:08:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:01,343 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-10-13 05:08:01,523 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 37 [2020-10-13 05:08:02,538 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 26 [2020-10-13 05:08:02,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:02,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:02,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:02,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:02,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:02,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:02,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:02,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:02,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:08:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:02,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:02,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:08:02,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:08:02,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:02,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:08:02,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:08:02,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842765440] [2020-10-13 05:08:02,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:02,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:08:02,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594681589] [2020-10-13 05:08:02,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:08:02,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:02,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:08:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:08:02,693 INFO L87 Difference]: Start difference. First operand 153 states and 168 transitions. Second operand 22 states. [2020-10-13 05:08:04,706 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-13 05:08:05,115 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-13 05:08:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:06,503 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2020-10-13 05:08:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:08:06,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 05:08:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:06,506 INFO L225 Difference]: With dead ends: 159 [2020-10-13 05:08:06,506 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 05:08:06,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:08:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 05:08:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-13 05:08:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 05:08:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 171 transitions. [2020-10-13 05:08:06,530 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 171 transitions. Word has length 50 [2020-10-13 05:08:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:06,530 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 171 transitions. [2020-10-13 05:08:06,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:08:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 171 transitions. [2020-10-13 05:08:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:08:06,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:06,531 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:06,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:08:06,532 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:06,532 INFO L82 PathProgramCache]: Analyzing trace with hash -250443642, now seen corresponding path program 10 times [2020-10-13 05:08:06,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:06,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413911622] [2020-10-13 05:08:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:06,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:11,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:08:11,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:08:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4614 [2020-10-13 05:08:11,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:08:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 05:08:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:11,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:11,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:11,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:11,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:11,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:11,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:11,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:11,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:11,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:11,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:11,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:11,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:11,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 05:08:11,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413911622] [2020-10-13 05:08:11,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:11,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:08:11,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172602088] [2020-10-13 05:08:11,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:08:11,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:08:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:08:11,396 INFO L87 Difference]: Start difference. First operand 157 states and 171 transitions. Second operand 11 states. [2020-10-13 05:08:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:12,386 INFO L93 Difference]: Finished difference Result 278 states and 309 transitions. [2020-10-13 05:08:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:08:12,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-13 05:08:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:12,389 INFO L225 Difference]: With dead ends: 278 [2020-10-13 05:08:12,389 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 05:08:12,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:08:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 05:08:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2020-10-13 05:08:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 05:08:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2020-10-13 05:08:12,418 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 50 [2020-10-13 05:08:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:12,419 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2020-10-13 05:08:12,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:08:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2020-10-13 05:08:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:08:12,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:12,420 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:12,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:08:12,420 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1997427398, now seen corresponding path program 10 times [2020-10-13 05:08:12,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:12,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546196] [2020-10-13 05:08:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:12,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:17,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:17,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:08:17,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:08:17,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-13 05:08:17,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:17,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:08:17,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:08:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:08:17,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:17,969 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 19 [2020-10-13 05:08:18,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:18,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:18,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:18,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:18,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:18,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:18,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:18,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:18,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:18,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:18,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:18,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:08:18,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546196] [2020-10-13 05:08:18,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:18,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:08:18,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698920894] [2020-10-13 05:08:18,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:08:18,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:08:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:08:18,488 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand 12 states. [2020-10-13 05:08:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:18,973 INFO L93 Difference]: Finished difference Result 176 states and 189 transitions. [2020-10-13 05:08:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:08:18,975 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 05:08:18,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:18,976 INFO L225 Difference]: With dead ends: 176 [2020-10-13 05:08:18,976 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 05:08:18,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:08:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 05:08:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2020-10-13 05:08:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 05:08:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2020-10-13 05:08:19,005 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 50 [2020-10-13 05:08:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:19,005 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2020-10-13 05:08:19,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:08:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2020-10-13 05:08:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:08:19,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:19,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:19,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:08:19,007 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1938752646, now seen corresponding path program 2 times [2020-10-13 05:08:19,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:19,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959170059] [2020-10-13 05:08:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:19,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:21,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:21,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:21,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:23,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:24,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:08:24,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:08:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 05:08:24,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:08:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:08:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:08:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,097 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 24 [2020-10-13 05:08:25,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:25,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:25,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:25,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:25,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:25,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:25,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:25,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 05:08:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:08:25,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 05:08:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:08:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:08:25,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959170059] [2020-10-13 05:08:25,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:25,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:08:25,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334948187] [2020-10-13 05:08:25,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:08:25,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:08:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:08:25,235 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand 18 states. [2020-10-13 05:08:25,786 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-13 05:08:26,289 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-13 05:08:26,507 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 05:08:26,691 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 05:08:27,308 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-13 05:08:27,702 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-13 05:08:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:27,872 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2020-10-13 05:08:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:08:27,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-13 05:08:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:27,874 INFO L225 Difference]: With dead ends: 170 [2020-10-13 05:08:27,875 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 05:08:27,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:08:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 05:08:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-10-13 05:08:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 05:08:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-10-13 05:08:27,902 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 53 [2020-10-13 05:08:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:27,903 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-10-13 05:08:27,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:08:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-10-13 05:08:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:08:27,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:27,904 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:27,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:08:27,905 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:27,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1255398204, now seen corresponding path program 11 times [2020-10-13 05:08:27,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:27,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450443978] [2020-10-13 05:08:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:29,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:08:29,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:08:29,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2004 [2020-10-13 05:08:29,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:08:29,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:08:29,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:08:29,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:31,746 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-13 05:08:31,939 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-13 05:08:32,139 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-10-13 05:08:32,714 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-10-13 05:08:32,930 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 30 [2020-10-13 05:08:33,123 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 26 [2020-10-13 05:08:33,323 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2020-10-13 05:08:33,556 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 14 [2020-10-13 05:08:33,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:33,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:33,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:33,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:33,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:33,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:33,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:33,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:33,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:33,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:33,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:33,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:33,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:33,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:33,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:33,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:33,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450443978] [2020-10-13 05:08:33,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:33,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:08:33,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469350821] [2020-10-13 05:08:33,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:08:33,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:33,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:08:33,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:08:33,760 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 32 states. [2020-10-13 05:08:34,015 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-13 05:08:34,785 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-13 05:08:35,098 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-13 05:08:35,441 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-13 05:08:35,885 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-13 05:08:36,156 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-13 05:08:36,495 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-13 05:08:36,831 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 66 [2020-10-13 05:08:37,337 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-13 05:08:37,841 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-13 05:08:38,525 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-13 05:08:38,757 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-13 05:08:39,050 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-13 05:08:39,321 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 05:08:39,678 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-10-13 05:08:39,934 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-13 05:08:40,382 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 05:08:41,147 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-13 05:08:41,960 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 05:08:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:42,298 INFO L93 Difference]: Finished difference Result 204 states and 225 transitions. [2020-10-13 05:08:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:08:42,306 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2020-10-13 05:08:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:42,308 INFO L225 Difference]: With dead ends: 204 [2020-10-13 05:08:42,308 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 05:08:42,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=516, Invalid=3906, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 05:08:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 05:08:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2020-10-13 05:08:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 05:08:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2020-10-13 05:08:42,345 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 52 [2020-10-13 05:08:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:42,345 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2020-10-13 05:08:42,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:08:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2020-10-13 05:08:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:08:42,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:42,346 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:42,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:08:42,347 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:42,347 INFO L82 PathProgramCache]: Analyzing trace with hash -202187950, now seen corresponding path program 11 times [2020-10-13 05:08:42,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:42,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409037917] [2020-10-13 05:08:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:42,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:42,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:42,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:42,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:44,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:44,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:45,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:08:47,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:47,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:47,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:47,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:47,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:47,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:47,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:47,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:47,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:47,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:47,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:47,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:08:47,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409037917] [2020-10-13 05:08:47,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:47,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:08:47,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563440399] [2020-10-13 05:08:47,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:08:47,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:47,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:08:47,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:08:47,635 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand 16 states. [2020-10-13 05:08:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:49,010 INFO L93 Difference]: Finished difference Result 226 states and 248 transitions. [2020-10-13 05:08:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:08:49,012 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-13 05:08:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:49,014 INFO L225 Difference]: With dead ends: 226 [2020-10-13 05:08:49,014 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 05:08:49,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:08:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 05:08:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 177. [2020-10-13 05:08:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 05:08:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 191 transitions. [2020-10-13 05:08:49,068 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 191 transitions. Word has length 53 [2020-10-13 05:08:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:49,069 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 191 transitions. [2020-10-13 05:08:49,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:08:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 191 transitions. [2020-10-13 05:08:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:08:49,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:49,070 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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] [2020-10-13 05:08:49,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:08:49,070 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:49,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:49,071 INFO L82 PathProgramCache]: Analyzing trace with hash 498748712, now seen corresponding path program 3 times [2020-10-13 05:08:49,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:49,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054677146] [2020-10-13 05:08:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:49,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:51,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:51,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:52,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:54,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 05:08:54,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:54,839 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 05:08:55,095 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-10-13 05:08:55,288 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-10-13 05:08:55,566 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 05:08:55,879 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-13 05:08:56,127 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-13 05:08:56,395 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-13 05:08:56,727 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-13 05:08:56,969 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-13 05:08:57,216 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-13 05:08:57,410 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2020-10-13 05:08:57,747 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 24 [2020-10-13 05:08:57,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:57,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:57,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:57,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:57,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:57,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:57,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:57,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:57,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:57,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:57,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:57,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:57,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:57,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:57,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 05:08:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:57,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:57,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:57,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:57,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:57,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:08:57,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:08:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:08:57,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:08:57,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054677146] [2020-10-13 05:08:57,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:57,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:08:57,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572679747] [2020-10-13 05:08:57,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:08:57,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:08:57,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:08:57,981 INFO L87 Difference]: Start difference. First operand 177 states and 191 transitions. Second operand 25 states. [2020-10-13 05:08:58,254 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 36 [2020-10-13 05:08:58,777 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-13 05:08:59,099 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-13 05:08:59,468 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-13 05:09:00,037 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-13 05:09:00,438 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2020-10-13 05:09:00,760 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 35 [2020-10-13 05:09:01,032 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 36 [2020-10-13 05:09:01,299 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 36 [2020-10-13 05:09:01,624 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 05:09:01,978 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 05:09:02,353 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-13 05:09:02,631 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-13 05:09:03,025 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-13 05:09:03,404 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-13 05:09:03,706 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-13 05:09:04,079 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-13 05:09:04,367 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 31 [2020-10-13 05:09:04,595 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 05:09:04,940 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-13 05:09:05,379 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-13 05:09:05,695 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-13 05:09:05,953 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-13 05:09:06,247 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-13 05:09:06,498 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-13 05:09:06,820 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2020-10-13 05:09:07,113 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-13 05:09:08,061 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 26 [2020-10-13 05:09:08,453 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-13 05:09:08,930 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-13 05:09:09,246 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-13 05:09:09,591 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-13 05:09:09,838 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-13 05:09:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:09,842 INFO L93 Difference]: Finished difference Result 200 states and 217 transitions. [2020-10-13 05:09:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 05:09:09,843 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-13 05:09:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:09,844 INFO L225 Difference]: With dead ends: 200 [2020-10-13 05:09:09,844 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 05:09:09,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 05:09:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 05:09:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 181. [2020-10-13 05:09:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 05:09:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 194 transitions. [2020-10-13 05:09:09,887 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 194 transitions. Word has length 55 [2020-10-13 05:09:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:09,887 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 194 transitions. [2020-10-13 05:09:09,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:09:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 194 transitions. [2020-10-13 05:09:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:09:09,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:09,888 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:09,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:09:09,889 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1537344146, now seen corresponding path program 12 times [2020-10-13 05:09:09,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:09,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230876665] [2020-10-13 05:09:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:09,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:09,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:09,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:09,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:09:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:15,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:15,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:15,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:15,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:15,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:15,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:15,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:15,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:15,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:15,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:15,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:15,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:15,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:09:15,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230876665] [2020-10-13 05:09:15,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:15,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:09:15,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847784192] [2020-10-13 05:09:15,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:09:15,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:09:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:09:15,324 INFO L87 Difference]: Start difference. First operand 181 states and 194 transitions. Second operand 13 states. [2020-10-13 05:09:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:16,923 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2020-10-13 05:09:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:09:16,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-13 05:09:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:16,928 INFO L225 Difference]: With dead ends: 213 [2020-10-13 05:09:16,928 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 05:09:16,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:09:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 05:09:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2020-10-13 05:09:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 05:09:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 197 transitions. [2020-10-13 05:09:17,016 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 197 transitions. Word has length 55 [2020-10-13 05:09:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:17,017 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 197 transitions. [2020-10-13 05:09:17,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:09:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 197 transitions. [2020-10-13 05:09:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:09:17,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:17,018 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:17,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:09:17,019 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1413475924, now seen corresponding path program 12 times [2020-10-13 05:09:17,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:17,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526096808] [2020-10-13 05:09:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:19,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:22,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:22,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:09:22,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 05:09:22,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:09:22,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:09:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:09:22,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:22,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:22,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:22,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:22,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:22,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:22,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:22,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:22,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:22,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:22,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:22,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:22,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:22,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:22,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:22,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:22,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:22,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:22,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 05:09:22,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526096808] [2020-10-13 05:09:22,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:22,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:09:22,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271570152] [2020-10-13 05:09:22,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:09:22,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:09:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:09:22,413 INFO L87 Difference]: Start difference. First operand 184 states and 197 transitions. Second operand 12 states. [2020-10-13 05:09:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:24,038 INFO L93 Difference]: Finished difference Result 332 states and 362 transitions. [2020-10-13 05:09:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:09:24,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-13 05:09:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:24,041 INFO L225 Difference]: With dead ends: 332 [2020-10-13 05:09:24,041 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 05:09:24,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:09:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 05:09:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 184. [2020-10-13 05:09:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 05:09:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 196 transitions. [2020-10-13 05:09:24,094 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 196 transitions. Word has length 55 [2020-10-13 05:09:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:24,094 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 196 transitions. [2020-10-13 05:09:24,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:09:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 196 transitions. [2020-10-13 05:09:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:09:24,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:24,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:24,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:09:24,096 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash 306522932, now seen corresponding path program 3 times [2020-10-13 05:09:24,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:24,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192830492] [2020-10-13 05:09:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:24,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:24,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:24,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:09:24,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:09:24,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-13 05:09:24,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:24,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:09:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:09:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:09:24,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:25,548 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-10-13 05:09:25,736 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2020-10-13 05:09:25,968 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 35 [2020-10-13 05:09:26,211 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-10-13 05:09:26,515 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-10-13 05:09:26,725 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2020-10-13 05:09:27,025 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-13 05:09:27,253 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2020-10-13 05:09:28,319 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 26 [2020-10-13 05:09:28,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:28,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:28,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:28,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:28,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:28,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:28,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:28,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:28,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:28,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:28,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:28,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:28,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:28,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:09:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:28,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:28,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:28,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:28,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:09:28,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:09:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:09:28,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:28,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:09:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:28,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:28,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:28,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:28,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:28,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:09:28,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:09:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:09:28,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:09:28,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192830492] [2020-10-13 05:09:28,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:28,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:09:28,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499214543] [2020-10-13 05:09:28,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:09:28,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:09:28,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:09:28,536 INFO L87 Difference]: Start difference. First operand 184 states and 196 transitions. Second operand 22 states. [2020-10-13 05:09:29,230 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-13 05:09:30,038 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-13 05:09:30,421 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-13 05:09:30,601 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-13 05:09:30,906 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-13 05:09:31,861 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-13 05:09:32,154 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 05:09:32,479 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-10-13 05:09:32,956 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-13 05:09:33,458 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-13 05:09:33,844 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-13 05:09:34,317 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 05:09:34,774 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-13 05:09:35,508 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-13 05:09:35,768 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-13 05:09:35,958 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-13 05:09:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:36,026 INFO L93 Difference]: Finished difference Result 199 states and 212 transitions. [2020-10-13 05:09:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:09:36,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-13 05:09:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:36,029 INFO L225 Difference]: With dead ends: 199 [2020-10-13 05:09:36,030 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 05:09:36,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=410, Invalid=2670, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:09:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 05:09:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2020-10-13 05:09:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 05:09:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 197 transitions. [2020-10-13 05:09:36,094 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 197 transitions. Word has length 58 [2020-10-13 05:09:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:36,094 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 197 transitions. [2020-10-13 05:09:36,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:09:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 197 transitions. [2020-10-13 05:09:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:09:36,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:36,096 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:36,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:09:36,096 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -711702314, now seen corresponding path program 13 times [2020-10-13 05:09:36,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:36,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868471992] [2020-10-13 05:09:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:36,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:37,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:38,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:38,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:39,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:40,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:41,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:41,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:09:41,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:09:41,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 05:09:41,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:09:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:09:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:41,602 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-10-13 05:09:41,804 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-10-13 05:09:42,054 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-10-13 05:09:42,217 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2020-10-13 05:09:42,606 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-10-13 05:09:42,903 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2020-10-13 05:09:43,174 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-13 05:09:43,482 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 26 [2020-10-13 05:09:43,832 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 31 [2020-10-13 05:09:44,215 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2020-10-13 05:09:44,515 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2020-10-13 05:09:44,850 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2020-10-13 05:09:45,237 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2020-10-13 05:09:45,658 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 31 [2020-10-13 05:09:45,969 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2020-10-13 05:09:46,298 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 25 [2020-10-13 05:09:46,570 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 21 [2020-10-13 05:09:46,881 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 27 [2020-10-13 05:09:47,213 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 18 [2020-10-13 05:09:47,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:47,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:47,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:47,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:47,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:47,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:47,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:47,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:47,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:47,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:47,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:47,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:47,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:47,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:47,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:47,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:47,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:47,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 5 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:09:47,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868471992] [2020-10-13 05:09:47,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:47,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:09:47,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142619569] [2020-10-13 05:09:47,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:09:47,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:09:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:09:47,447 INFO L87 Difference]: Start difference. First operand 186 states and 197 transitions. Second operand 27 states. [2020-10-13 05:09:48,509 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-10-13 05:09:48,739 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-10-13 05:09:48,939 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-10-13 05:09:49,184 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2020-10-13 05:09:49,388 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-10-13 05:09:49,795 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-13 05:09:50,015 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 20 [2020-10-13 05:09:51,479 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-13 05:09:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:52,299 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2020-10-13 05:09:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:09:52,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2020-10-13 05:09:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:52,304 INFO L225 Difference]: With dead ends: 210 [2020-10-13 05:09:52,304 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 05:09:52,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:09:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 05:09:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 186. [2020-10-13 05:09:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 05:09:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 197 transitions. [2020-10-13 05:09:52,352 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 197 transitions. Word has length 57 [2020-10-13 05:09:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:52,353 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 197 transitions. [2020-10-13 05:09:52,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:09:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 197 transitions. [2020-10-13 05:09:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:09:52,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:52,354 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:52,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:09:52,354 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:52,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:52,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1981765116, now seen corresponding path program 13 times [2020-10-13 05:09:52,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:52,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623202434] [2020-10-13 05:09:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:56,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:57,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:57,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:09:57,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:09:57,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:09:57,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:09:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:57,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:09:57,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:57,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:57,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:57,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:09:57,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:57,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:57,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:57,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:57,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:57,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:57,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:57,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:57,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:57,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:57,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:57,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 73 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:09:57,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623202434] [2020-10-13 05:09:57,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:57,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:09:57,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796498477] [2020-10-13 05:09:57,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:09:57,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:57,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:09:57,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:09:57,782 INFO L87 Difference]: Start difference. First operand 186 states and 197 transitions. Second operand 18 states. [2020-10-13 05:10:00,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:00,060 INFO L93 Difference]: Finished difference Result 295 states and 321 transitions. [2020-10-13 05:10:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:10:00,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-13 05:10:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:00,065 INFO L225 Difference]: With dead ends: 295 [2020-10-13 05:10:00,065 INFO L226 Difference]: Without dead ends: 275 [2020-10-13 05:10:00,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:10:00,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-13 05:10:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 239. [2020-10-13 05:10:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-13 05:10:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 256 transitions. [2020-10-13 05:10:00,141 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 256 transitions. Word has length 58 [2020-10-13 05:10:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:00,141 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 256 transitions. [2020-10-13 05:10:00,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:10:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 256 transitions. [2020-10-13 05:10:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:10:00,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:00,142 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2020-10-13 05:10:00,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:10:00,142 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -587976678, now seen corresponding path program 4 times [2020-10-13 05:10:00,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:00,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702100851] [2020-10-13 05:10:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:00,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:01,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:01,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:10:01,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:10:01,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-13 05:10:01,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:01,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:10:01,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:10:01,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:10:01,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:04,109 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 140 DAG size of output: 63 [2020-10-13 05:10:05,223 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2020-10-13 05:10:05,705 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 31 [2020-10-13 05:10:06,056 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-13 05:10:06,318 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 35 [2020-10-13 05:10:06,547 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 29