/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-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:46:23,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:46:23,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:46:23,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:46:23,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:46:23,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:46:23,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:46:23,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:46:23,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:46:23,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:46:23,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:46:23,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:46:23,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:46:23,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:46:23,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:46:23,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:46:23,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:46:23,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:46:23,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:46:23,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:46:23,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:46:23,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:46:23,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:46:23,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:46:24,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:46:24,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:46:24,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:46:24,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:46:24,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:46:24,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:46:24,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:46:24,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:46:24,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:46:24,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:46:24,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:46:24,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:46:24,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:46:24,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:46:24,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:46:24,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:46:24,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:46:24,026 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 04:46:24,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:46:24,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:46:24,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:46:24,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:46:24,049 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:46:24,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:46:24,050 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:46:24,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:46:24,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:46:24,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:46:24,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:46:24,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:46:24,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:46:24,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:46:24,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:46:24,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:46:24,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:46:24,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:46:24,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:46:24,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:46:24,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:46:24,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:46:24,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:46:24,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:46:24,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:46:24,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:46:24,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:46:24,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:46:24,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:46:24,054 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 04:46:24,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:46:24,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:46:24,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:46:24,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:46:24,388 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:46:24,389 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-13 04:46:24,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dad76912d/55f04368d7f04a429b4f3b4d6a5ddf87/FLAGe53861434 [2020-10-13 04:46:24,938 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:46:24,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-13 04:46:24,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dad76912d/55f04368d7f04a429b4f3b4d6a5ddf87/FLAGe53861434 [2020-10-13 04:46:25,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dad76912d/55f04368d7f04a429b4f3b4d6a5ddf87 [2020-10-13 04:46:25,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:46:25,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:46:25,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:25,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:46:25,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:46:25,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445b6256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25, skipping insertion in model container [2020-10-13 04:46:25,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:46:25,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:46:25,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:25,470 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:46:25,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:25,525 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:46:25,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25 WrapperNode [2020-10-13 04:46:25,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:25,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:46:25,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:46:25,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:46:25,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (1/1) ... [2020-10-13 04:46:25,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:46:25,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:46:25,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:46:25,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:46:25,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (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 04:46:25,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:46:25,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:46:25,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:46:25,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:46:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:46:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:46:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:46:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:46:25,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:46:25,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:46:25,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:46:25,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:46:25,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:46:25,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:46:26,209 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:46:26,210 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-13 04:46:26,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:26 BoogieIcfgContainer [2020-10-13 04:46:26,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:46:26,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:46:26,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:46:26,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:46:26,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:46:25" (1/3) ... [2020-10-13 04:46:26,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7802bab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:26, skipping insertion in model container [2020-10-13 04:46:26,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:25" (2/3) ... [2020-10-13 04:46:26,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7802bab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:26, skipping insertion in model container [2020-10-13 04:46:26,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:26" (3/3) ... [2020-10-13 04:46:26,224 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2020-10-13 04:46:26,235 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:46:26,244 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:46:26,258 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:46:26,282 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:46:26,282 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:46:26,282 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:46:26,282 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:46:26,283 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:46:26,283 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:46:26,283 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:46:26,283 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:46:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-10-13 04:46:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:46:26,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:26,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:26,314 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2020-10-13 04:46:26,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:26,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851091744] [2020-10-13 04:46:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:26,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:26,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:28,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:28,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:46:28,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:46:28,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-13 04:46:28,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 04:46:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:28,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:46:28,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:28,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:28,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:28,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:28,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:28,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:46:28,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:28,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:28,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:46:28,633 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 04:46:28,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851091744] [2020-10-13 04:46:28,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:28,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:46:28,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535608012] [2020-10-13 04:46:28,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:46:28,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:46:28,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:28,666 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-10-13 04:46:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:28,879 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2020-10-13 04:46:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:46:28,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 04:46:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:28,892 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:46:28,893 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:46:28,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:46:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 04:46:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:46:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-13 04:46:28,953 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-13 04:46:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:28,954 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-13 04:46:28,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:46:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-13 04:46:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:46:28,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:28,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:28,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:46:28,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2020-10-13 04:46:28,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:28,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498947012] [2020-10-13 04:46:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:28,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:28,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:33,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:33,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:46:33,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:46:33,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:46:33,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:33,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:33,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:46:33,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:33,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:34,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:34,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:34,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:34,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:34,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:34,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:34,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:34,025 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 04:46:34,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498947012] [2020-10-13 04:46:34,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:34,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:34,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117647836] [2020-10-13 04:46:34,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:34,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:34,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:34,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:34,029 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-10-13 04:46:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:34,193 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-10-13 04:46:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:34,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 04:46:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:34,195 INFO L225 Difference]: With dead ends: 91 [2020-10-13 04:46:34,195 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:46:34,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:46:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-13 04:46:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:46:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-13 04:46:34,207 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 29 [2020-10-13 04:46:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:34,207 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-13 04:46:34,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-13 04:46:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:46:34,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:34,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:34,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:46:34,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:34,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1500275198, now seen corresponding path program 1 times [2020-10-13 04:46:34,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:34,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240961780] [2020-10-13 04:46:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:34,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:39,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 04:46:39,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:46:39,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:46:39,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:39,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:39,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:39,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:39,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:39,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:39,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:39,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 04:46:39,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240961780] [2020-10-13 04:46:39,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:39,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:39,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924065010] [2020-10-13 04:46:39,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:39,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:39,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:39,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:39,278 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 4 states. [2020-10-13 04:46:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:39,415 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-13 04:46:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:39,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-13 04:46:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:39,417 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:46:39,417 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:46:39,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:46:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 04:46:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:46:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-13 04:46:39,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 45 [2020-10-13 04:46:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:39,435 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-13 04:46:39,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-13 04:46:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:46:39,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:39,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:39,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:46:39,441 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2020-10-13 04:46:39,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:39,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863461589] [2020-10-13 04:46:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:39,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:41,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:44,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:44,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:46:44,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:46:44,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:44,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:44,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:44,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:46:44,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:44,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:44,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:44,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:44,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:44,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:44,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 04:46:44,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:44,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:44,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:46:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 04:46:44,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863461589] [2020-10-13 04:46:44,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:44,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:44,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100719182] [2020-10-13 04:46:44,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:44,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:44,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:44,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:44,544 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 5 states. [2020-10-13 04:46:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:44,789 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-10-13 04:46:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:44,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-13 04:46:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:44,791 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:46:44,791 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:46:44,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:46:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-10-13 04:46:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:46:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-13 04:46:44,809 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 47 [2020-10-13 04:46:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:44,810 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-13 04:46:44,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-13 04:46:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:46:44,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:44,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:44,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:46:44,812 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1887654640, now seen corresponding path program 2 times [2020-10-13 04:46:44,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:44,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618631618] [2020-10-13 04:46:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:44,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:44,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:44,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:45,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:45,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:49,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:49,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:46:49,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:46:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:49,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:49,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:49,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:49,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:49,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:49,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:49,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:49,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 04:46:49,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618631618] [2020-10-13 04:46:49,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:49,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:49,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377802714] [2020-10-13 04:46:49,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:49,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:49,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:49,893 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 5 states. [2020-10-13 04:46:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:50,011 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2020-10-13 04:46:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:50,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 04:46:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:50,013 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:46:50,014 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:46:50,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:46:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 04:46:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:46:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 04:46:50,032 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 63 [2020-10-13 04:46:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:50,033 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 04:46:50,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 04:46:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:46:50,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:50,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:50,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:46:50,036 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1765015214, now seen corresponding path program 3 times [2020-10-13 04:46:50,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:50,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122462476] [2020-10-13 04:46:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:50,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:55,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:46:55,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:46:55,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:46:55,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:55,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:46:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:46:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:46:55,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:55,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:55,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:55,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:55,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:55,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:55,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:55,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 04:46:55,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122462476] [2020-10-13 04:46:55,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:55,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:46:55,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648976894] [2020-10-13 04:46:55,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:46:55,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:46:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:55,124 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 6 states. [2020-10-13 04:46:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:55,345 INFO L93 Difference]: Finished difference Result 147 states and 171 transitions. [2020-10-13 04:46:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:46:55,346 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-13 04:46:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:55,347 INFO L225 Difference]: With dead ends: 147 [2020-10-13 04:46:55,347 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:46:55,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:46:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2020-10-13 04:46:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:46:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-13 04:46:55,356 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 65 [2020-10-13 04:46:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:55,357 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-13 04:46:55,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:46:55,357 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-13 04:46:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:46:55,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:55,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:55,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:46:55,359 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash 696374430, now seen corresponding path program 4 times [2020-10-13 04:46:55,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:55,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522640428] [2020-10-13 04:46:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:55,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:00,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:47:00,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:47:00,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:47:00,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:47:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:47:00,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:00,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:00,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:00,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:00,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 04:47:00,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522640428] [2020-10-13 04:47:00,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:00,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:47:00,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827431145] [2020-10-13 04:47:00,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:47:00,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:47:00,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:47:00,448 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 6 states. [2020-10-13 04:47:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:00,545 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2020-10-13 04:47:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:47:00,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-13 04:47:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:00,547 INFO L225 Difference]: With dead ends: 164 [2020-10-13 04:47:00,547 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:47:00,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:47:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:47:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 04:47:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:47:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-13 04:47:00,556 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 81 [2020-10-13 04:47:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:00,556 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-13 04:47:00,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:47:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-13 04:47:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:47:00,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:00,558 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:00,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:47:00,558 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:00,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2072984252, now seen corresponding path program 5 times [2020-10-13 04:47:00,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:00,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047193630] [2020-10-13 04:47:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:00,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:05,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:05,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:47:05,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:47:05,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:47:05,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:47:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:47:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:47:05,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:05,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:05,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:05,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:05,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:05,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:05,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:05,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:47:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 04:47:05,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047193630] [2020-10-13 04:47:05,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:05,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:47:05,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500584080] [2020-10-13 04:47:05,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:47:05,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:05,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:47:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:05,685 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 7 states. [2020-10-13 04:47:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:05,952 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-10-13 04:47:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:47:05,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-13 04:47:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:05,953 INFO L225 Difference]: With dead ends: 179 [2020-10-13 04:47:05,954 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:47:05,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:47:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-10-13 04:47:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:47:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2020-10-13 04:47:05,970 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 83 [2020-10-13 04:47:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:05,971 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2020-10-13 04:47:05,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:47:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2020-10-13 04:47:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:47:05,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:05,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:05,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:47:05,973 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash -529664852, now seen corresponding path program 6 times [2020-10-13 04:47:05,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:05,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758117504] [2020-10-13 04:47:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:10,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:11,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:47:11,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:11,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:47:11,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:11,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:47:11,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:47:11,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:11,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:11,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:11,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:11,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:11,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:11,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:11,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 04:47:11,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758117504] [2020-10-13 04:47:11,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:11,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:47:11,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225866989] [2020-10-13 04:47:11,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:47:11,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:47:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:11,062 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand 7 states. [2020-10-13 04:47:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:11,203 INFO L93 Difference]: Finished difference Result 198 states and 216 transitions. [2020-10-13 04:47:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:47:11,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-13 04:47:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:11,205 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:47:11,205 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:47:11,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:47:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 04:47:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:47:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-13 04:47:11,214 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 99 [2020-10-13 04:47:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:11,214 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-13 04:47:11,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:47:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-13 04:47:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:47:11,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:11,216 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:11,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:47:11,216 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1507504310, now seen corresponding path program 7 times [2020-10-13 04:47:11,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:11,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014625201] [2020-10-13 04:47:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:11,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:15,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:16,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:47:16,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:47:16,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:47:16,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:47:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:47:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:47:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:16,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:16,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:16,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:16,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:16,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:16,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 04:47:16,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014625201] [2020-10-13 04:47:16,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:16,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:47:16,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129220660] [2020-10-13 04:47:16,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:47:16,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:16,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:47:16,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:16,330 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 8 states. [2020-10-13 04:47:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:16,639 INFO L93 Difference]: Finished difference Result 211 states and 235 transitions. [2020-10-13 04:47:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:47:16,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-10-13 04:47:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:16,641 INFO L225 Difference]: With dead ends: 211 [2020-10-13 04:47:16,641 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 04:47:16,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 04:47:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2020-10-13 04:47:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:47:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2020-10-13 04:47:16,659 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 101 [2020-10-13 04:47:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:16,659 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2020-10-13 04:47:16,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:47:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2020-10-13 04:47:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 04:47:16,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:16,663 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:16,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:47:16,664 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash 185855290, now seen corresponding path program 8 times [2020-10-13 04:47:16,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:16,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435150573] [2020-10-13 04:47:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:16,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:17,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:21,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:21,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 04:47:21,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:21,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:47:21,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:21,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:47:21,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:21,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:47:21,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:21,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:21,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:21,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:21,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:21,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:21,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:21,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-13 04:47:21,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435150573] [2020-10-13 04:47:21,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:21,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:47:21,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438443188] [2020-10-13 04:47:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:47:21,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:47:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:21,765 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 8 states. [2020-10-13 04:47:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:21,915 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2020-10-13 04:47:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:47:21,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-13 04:47:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:21,917 INFO L225 Difference]: With dead ends: 232 [2020-10-13 04:47:21,918 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:47:21,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:47:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 04:47:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:47:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-13 04:47:21,928 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 117 [2020-10-13 04:47:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:21,929 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-13 04:47:21,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:47:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-13 04:47:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:47:21,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:21,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:21,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:47:21,934 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1183915096, now seen corresponding path program 9 times [2020-10-13 04:47:21,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:21,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23067277] [2020-10-13 04:47:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:21,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:21,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:21,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:22,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:22,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:22,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:26,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:26,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:47:26,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:47:26,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:47:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:47:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:47:26,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:27,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:27,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:27,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:47:27,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:27,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:27,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-13 04:47:27,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23067277] [2020-10-13 04:47:27,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:27,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:47:27,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055641045] [2020-10-13 04:47:27,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:47:27,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:27,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:47:27,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:27,052 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 9 states. [2020-10-13 04:47:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:27,426 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2020-10-13 04:47:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:47:27,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 119 [2020-10-13 04:47:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:27,427 INFO L225 Difference]: With dead ends: 243 [2020-10-13 04:47:27,428 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:47:27,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:47:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-10-13 04:47:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:47:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2020-10-13 04:47:27,435 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 119 [2020-10-13 04:47:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:27,435 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2020-10-13 04:47:27,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:47:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2020-10-13 04:47:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 04:47:27,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:27,437 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:27,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:47:27,438 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:27,438 INFO L82 PathProgramCache]: Analyzing trace with hash 961453640, now seen corresponding path program 10 times [2020-10-13 04:47:27,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:27,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688663597] [2020-10-13 04:47:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:32,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 04:47:32,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:32,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:47:32,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:32,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:47:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:47:32,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:32,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:32,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:32,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:32,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:32,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:47:32,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:32,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 04:47:32,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688663597] [2020-10-13 04:47:32,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:32,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:47:32,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539492361] [2020-10-13 04:47:32,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:47:32,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:32,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:47:32,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:32,531 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand 9 states. [2020-10-13 04:47:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:32,667 INFO L93 Difference]: Finished difference Result 266 states and 284 transitions. [2020-10-13 04:47:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:47:32,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-10-13 04:47:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:32,669 INFO L225 Difference]: With dead ends: 266 [2020-10-13 04:47:32,670 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:47:32,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:47:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-13 04:47:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:47:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2020-10-13 04:47:32,677 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 135 [2020-10-13 04:47:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:32,678 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2020-10-13 04:47:32,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:47:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2020-10-13 04:47:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:47:32,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:32,679 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:32,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:47:32,679 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash -780828186, now seen corresponding path program 11 times [2020-10-13 04:47:32,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:32,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027351326] [2020-10-13 04:47:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:32,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:33,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:37,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:37,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:47:37,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:37,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 04:47:37,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:37,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:47:37,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:47:37,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:47:37,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:37,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:37,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:37,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:37,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 04:47:37,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027351326] [2020-10-13 04:47:37,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:37,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:47:37,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254745918] [2020-10-13 04:47:37,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:47:37,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:37,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:47:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:37,818 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 10 states. [2020-10-13 04:47:38,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:38,227 INFO L93 Difference]: Finished difference Result 275 states and 299 transitions. [2020-10-13 04:47:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:47:38,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 137 [2020-10-13 04:47:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:38,229 INFO L225 Difference]: With dead ends: 275 [2020-10-13 04:47:38,230 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 04:47:38,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 04:47:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2020-10-13 04:47:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 04:47:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2020-10-13 04:47:38,237 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 137 [2020-10-13 04:47:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:38,238 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2020-10-13 04:47:38,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:47:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2020-10-13 04:47:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 04:47:38,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:38,240 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:38,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:47:38,240 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash 33613782, now seen corresponding path program 12 times [2020-10-13 04:47:38,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:38,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430286572] [2020-10-13 04:47:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:38,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:43,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 04:47:43,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:43,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:47:43,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:47:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:47:43,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:43,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:43,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:43,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:43,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:43,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:43,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:43,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:43,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:43,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:43,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 04:47:43,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430286572] [2020-10-13 04:47:43,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:43,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:47:43,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892258110] [2020-10-13 04:47:43,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:47:43,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:43,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:47:43,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:43,357 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand 10 states. [2020-10-13 04:47:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:43,511 INFO L93 Difference]: Finished difference Result 300 states and 318 transitions. [2020-10-13 04:47:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:47:43,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 153 [2020-10-13 04:47:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:43,513 INFO L225 Difference]: With dead ends: 300 [2020-10-13 04:47:43,513 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 04:47:43,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:43,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 04:47:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-13 04:47:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:47:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-13 04:47:43,520 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 153 [2020-10-13 04:47:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:43,521 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-13 04:47:43,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:47:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-13 04:47:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:47:43,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:43,523 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:43,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:47:43,523 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:43,524 INFO L82 PathProgramCache]: Analyzing trace with hash 545087476, now seen corresponding path program 13 times [2020-10-13 04:47:43,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:43,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131512329] [2020-10-13 04:47:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:43,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:48,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:48,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:47:48,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:48,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:47:48,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:48,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:48,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:47:48,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:48,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:48,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:48,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:48,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:48,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:48,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:48,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:48,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:48,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:48,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 04:47:48,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131512329] [2020-10-13 04:47:48,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:48,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:48,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088797653] [2020-10-13 04:47:48,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:48,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:48,657 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 11 states. [2020-10-13 04:47:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:49,098 INFO L93 Difference]: Finished difference Result 307 states and 331 transitions. [2020-10-13 04:47:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:49,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 155 [2020-10-13 04:47:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:49,100 INFO L225 Difference]: With dead ends: 307 [2020-10-13 04:47:49,100 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 04:47:49,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 04:47:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 176. [2020-10-13 04:47:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:47:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 185 transitions. [2020-10-13 04:47:49,108 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 185 transitions. Word has length 155 [2020-10-13 04:47:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:49,108 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 185 transitions. [2020-10-13 04:47:49,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 185 transitions. [2020-10-13 04:47:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:47:49,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:49,111 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:49,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:47:49,111 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1360374244, now seen corresponding path program 14 times [2020-10-13 04:47:49,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:49,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173192085] [2020-10-13 04:47:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:49,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:49,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:49,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:49,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:49,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:54,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:54,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:54,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:54,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:54,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:54,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:54,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:54,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:54,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:54,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:54,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-13 04:47:54,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173192085] [2020-10-13 04:47:54,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:54,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:54,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866282906] [2020-10-13 04:47:54,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:54,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:54,237 INFO L87 Difference]: Start difference. First operand 176 states and 185 transitions. Second operand 11 states. [2020-10-13 04:47:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:54,391 INFO L93 Difference]: Finished difference Result 334 states and 352 transitions. [2020-10-13 04:47:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:54,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2020-10-13 04:47:54,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:54,394 INFO L225 Difference]: With dead ends: 334 [2020-10-13 04:47:54,394 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:47:54,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:47:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-13 04:47:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 04:47:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2020-10-13 04:47:54,402 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 171 [2020-10-13 04:47:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:54,402 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2020-10-13 04:47:54,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2020-10-13 04:47:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 04:47:54,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:54,406 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:54,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:47:54,406 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1079744130, now seen corresponding path program 15 times [2020-10-13 04:47:54,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:54,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51386552] [2020-10-13 04:47:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:55,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:59,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 04:47:59,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:59,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-13 04:47:59,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:47:59,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:59,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:47:59,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:59,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:59,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:59,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:59,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:59,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:59,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:59,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-13 04:47:59,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51386552] [2020-10-13 04:47:59,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:59,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:47:59,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574204970] [2020-10-13 04:47:59,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:47:59,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:47:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:59,628 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand 12 states. [2020-10-13 04:47:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:59,768 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2020-10-13 04:47:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:47:59,768 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 173 [2020-10-13 04:47:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:59,770 INFO L225 Difference]: With dead ends: 336 [2020-10-13 04:47:59,770 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 04:47:59,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 04:47:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2020-10-13 04:47:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 04:47:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 189 transitions. [2020-10-13 04:47:59,778 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 189 transitions. Word has length 173 [2020-10-13 04:47:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:59,778 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 189 transitions. [2020-10-13 04:47:59,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:47:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 189 transitions. [2020-10-13 04:47:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 04:47:59,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:59,781 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:59,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:47:59,781 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1977144224, now seen corresponding path program 16 times [2020-10-13 04:47:59,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:59,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855324715] [2020-10-13 04:47:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:59,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:00,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:04,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:04,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 04:48:04,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:04,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:48:04,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:48:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 04:48:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:48:04,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:04,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:04,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:04,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:04,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:04,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:04,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:04,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 04:48:04,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855324715] [2020-10-13 04:48:04,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:04,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:48:04,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625908382] [2020-10-13 04:48:04,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:48:04,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:48:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:48:04,920 INFO L87 Difference]: Start difference. First operand 180 states and 189 transitions. Second operand 12 states. [2020-10-13 04:48:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:05,345 INFO L93 Difference]: Finished difference Result 341 states and 365 transitions. [2020-10-13 04:48:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:48:05,346 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 175 [2020-10-13 04:48:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:05,347 INFO L225 Difference]: With dead ends: 341 [2020-10-13 04:48:05,347 INFO L226 Difference]: Without dead ends: 204 [2020-10-13 04:48:05,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:48:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-13 04:48:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 196. [2020-10-13 04:48:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:48:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-13 04:48:05,357 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 175 [2020-10-13 04:48:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:05,358 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-13 04:48:05,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:48:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-13 04:48:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 04:48:05,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:05,359 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:05,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:48:05,360 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1093991024, now seen corresponding path program 17 times [2020-10-13 04:48:05,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:05,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383073458] [2020-10-13 04:48:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:05,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:05,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:05,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:05,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:05,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:06,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:10,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:48:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:10,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:10,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:10,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:10,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:10,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:10,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:10,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:10,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-13 04:48:10,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383073458] [2020-10-13 04:48:10,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:10,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:48:10,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428161451] [2020-10-13 04:48:10,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:48:10,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:48:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:10,552 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 13 states. [2020-10-13 04:48:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:11,059 INFO L93 Difference]: Finished difference Result 371 states and 395 transitions. [2020-10-13 04:48:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:48:11,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 191 [2020-10-13 04:48:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:11,062 INFO L225 Difference]: With dead ends: 371 [2020-10-13 04:48:11,063 INFO L226 Difference]: Without dead ends: 220 [2020-10-13 04:48:11,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-13 04:48:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 212. [2020-10-13 04:48:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 04:48:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 221 transitions. [2020-10-13 04:48:11,072 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 221 transitions. Word has length 191 [2020-10-13 04:48:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:11,073 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 221 transitions. [2020-10-13 04:48:11,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:48:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 221 transitions. [2020-10-13 04:48:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 04:48:11,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:11,074 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:11,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:48:11,075 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash 792336256, now seen corresponding path program 18 times [2020-10-13 04:48:11,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:11,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666320539] [2020-10-13 04:48:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:11,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:11,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:11,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:11,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:16,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 04:48:16,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:16,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:48:16,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:16,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:48:16,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:16,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:48:16,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:16,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:16,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:16,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:16,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:48:16,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:16,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:16,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:16,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:16,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-13 04:48:16,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666320539] [2020-10-13 04:48:16,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:16,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:48:16,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865859043] [2020-10-13 04:48:16,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:48:16,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:16,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:48:16,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:16,245 INFO L87 Difference]: Start difference. First operand 212 states and 221 transitions. Second operand 13 states. [2020-10-13 04:48:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:16,367 INFO L93 Difference]: Finished difference Result 402 states and 420 transitions. [2020-10-13 04:48:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:48:16,368 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 207 [2020-10-13 04:48:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:16,370 INFO L225 Difference]: With dead ends: 402 [2020-10-13 04:48:16,370 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 04:48:16,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 04:48:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-10-13 04:48:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 04:48:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2020-10-13 04:48:16,380 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 207 [2020-10-13 04:48:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:16,380 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2020-10-13 04:48:16,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:48:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2020-10-13 04:48:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 04:48:16,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:16,382 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:16,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:48:16,382 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:16,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2022608158, now seen corresponding path program 19 times [2020-10-13 04:48:16,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:16,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352564592] [2020-10-13 04:48:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:16,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:21,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 04:48:21,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:21,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-13 04:48:21,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:21,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:48:21,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:48:21,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:48:21,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:21,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:21,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-13 04:48:21,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352564592] [2020-10-13 04:48:21,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:21,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:48:21,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308105290] [2020-10-13 04:48:21,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:48:21,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:48:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:21,640 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 14 states. [2020-10-13 04:48:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:22,197 INFO L93 Difference]: Finished difference Result 403 states and 427 transitions. [2020-10-13 04:48:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:48:22,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 209 [2020-10-13 04:48:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:22,203 INFO L225 Difference]: With dead ends: 403 [2020-10-13 04:48:22,203 INFO L226 Difference]: Without dead ends: 238 [2020-10-13 04:48:22,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-13 04:48:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2020-10-13 04:48:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 04:48:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 239 transitions. [2020-10-13 04:48:22,221 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 239 transitions. Word has length 209 [2020-10-13 04:48:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:22,224 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 239 transitions. [2020-10-13 04:48:22,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:48:22,224 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 239 transitions. [2020-10-13 04:48:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 04:48:22,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:22,227 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:22,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:48:22,227 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash -45645042, now seen corresponding path program 20 times [2020-10-13 04:48:22,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:22,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748003244] [2020-10-13 04:48:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:22,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:22,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:22,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:22,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:25,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:27,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 04:48:27,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-13 04:48:27,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:48:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:48:27,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:27,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:27,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:27,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-13 04:48:27,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748003244] [2020-10-13 04:48:27,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:27,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:48:27,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888197819] [2020-10-13 04:48:27,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:48:27,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:27,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:48:27,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:27,502 INFO L87 Difference]: Start difference. First operand 230 states and 239 transitions. Second operand 14 states. [2020-10-13 04:48:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:27,656 INFO L93 Difference]: Finished difference Result 436 states and 454 transitions. [2020-10-13 04:48:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:48:27,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 225 [2020-10-13 04:48:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:27,658 INFO L225 Difference]: With dead ends: 436 [2020-10-13 04:48:27,658 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 04:48:27,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 04:48:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-13 04:48:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 04:48:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2020-10-13 04:48:27,668 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 225 [2020-10-13 04:48:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:27,668 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2020-10-13 04:48:27,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:48:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2020-10-13 04:48:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 04:48:27,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:27,670 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:27,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:48:27,671 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash -412021460, now seen corresponding path program 21 times [2020-10-13 04:48:27,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:27,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93764031] [2020-10-13 04:48:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:28,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:32,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 04:48:32,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:32,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-13 04:48:32,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:32,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:48:32,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:48:32,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:48:32,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:32,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:32,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:32,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:32,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-13 04:48:32,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93764031] [2020-10-13 04:48:32,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:32,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:48:32,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361357976] [2020-10-13 04:48:32,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:48:32,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:48:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:48:32,921 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 15 states. [2020-10-13 04:48:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:33,499 INFO L93 Difference]: Finished difference Result 435 states and 459 transitions. [2020-10-13 04:48:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:48:33,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 227 [2020-10-13 04:48:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:33,500 INFO L225 Difference]: With dead ends: 435 [2020-10-13 04:48:33,500 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 04:48:33,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:48:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 04:48:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 248. [2020-10-13 04:48:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-13 04:48:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 257 transitions. [2020-10-13 04:48:33,511 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 257 transitions. Word has length 227 [2020-10-13 04:48:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:33,511 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 257 transitions. [2020-10-13 04:48:33,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:48:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 257 transitions. [2020-10-13 04:48:33,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 04:48:33,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:33,514 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:33,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:48:33,517 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash -340596964, now seen corresponding path program 22 times [2020-10-13 04:48:33,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:33,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211484832] [2020-10-13 04:48:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:33,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:33,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:33,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:36,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:48:38,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:38,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:38,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:38,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-13 04:48:38,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211484832] [2020-10-13 04:48:38,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:38,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:48:38,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993649474] [2020-10-13 04:48:38,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:48:38,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:48:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:48:38,773 INFO L87 Difference]: Start difference. First operand 248 states and 257 transitions. Second operand 15 states. [2020-10-13 04:48:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:38,944 INFO L93 Difference]: Finished difference Result 470 states and 488 transitions. [2020-10-13 04:48:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:48:38,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 243 [2020-10-13 04:48:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:38,946 INFO L225 Difference]: With dead ends: 470 [2020-10-13 04:48:38,946 INFO L226 Difference]: Without dead ends: 251 [2020-10-13 04:48:38,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:48:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-13 04:48:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2020-10-13 04:48:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 04:48:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 259 transitions. [2020-10-13 04:48:38,956 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 259 transitions. Word has length 243 [2020-10-13 04:48:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:38,956 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 259 transitions. [2020-10-13 04:48:38,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:48:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 259 transitions. [2020-10-13 04:48:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 04:48:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:38,958 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:38,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:48:38,958 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash -263887430, now seen corresponding path program 23 times [2020-10-13 04:48:38,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:38,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328725590] [2020-10-13 04:48:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:38,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:39,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:41,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:44,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 04:48:44,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:44,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-13 04:48:44,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:44,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:44,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-13 04:48:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:44,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:44,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:44,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:44,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:44,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:44,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:44,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:44,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:44,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-13 04:48:44,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328725590] [2020-10-13 04:48:44,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:44,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:44,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995084493] [2020-10-13 04:48:44,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:44,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:44,292 INFO L87 Difference]: Start difference. First operand 250 states and 259 transitions. Second operand 16 states. [2020-10-13 04:48:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:44,892 INFO L93 Difference]: Finished difference Result 467 states and 491 transitions. [2020-10-13 04:48:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:44,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 245 [2020-10-13 04:48:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:44,895 INFO L225 Difference]: With dead ends: 467 [2020-10-13 04:48:44,895 INFO L226 Difference]: Without dead ends: 274 [2020-10-13 04:48:44,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-13 04:48:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 266. [2020-10-13 04:48:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-13 04:48:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 275 transitions. [2020-10-13 04:48:44,905 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 275 transitions. Word has length 245 [2020-10-13 04:48:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:44,906 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 275 transitions. [2020-10-13 04:48:44,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 275 transitions. [2020-10-13 04:48:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-13 04:48:44,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:44,908 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:44,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:48:44,908 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:44,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1584454742, now seen corresponding path program 24 times [2020-10-13 04:48:44,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:44,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309729750] [2020-10-13 04:48:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:44,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:49,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:50,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-13 04:48:50,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:50,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-13 04:48:50,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:50,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:50,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:50,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:50,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:50,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-13 04:48:50,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309729750] [2020-10-13 04:48:50,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:50,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:50,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736707834] [2020-10-13 04:48:50,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:50,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:50,255 INFO L87 Difference]: Start difference. First operand 266 states and 275 transitions. Second operand 16 states. [2020-10-13 04:48:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:50,426 INFO L93 Difference]: Finished difference Result 504 states and 522 transitions. [2020-10-13 04:48:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:50,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 261 [2020-10-13 04:48:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:50,429 INFO L225 Difference]: With dead ends: 504 [2020-10-13 04:48:50,429 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 04:48:50,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 04:48:50,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2020-10-13 04:48:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 04:48:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2020-10-13 04:48:50,441 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 261 [2020-10-13 04:48:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:50,441 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2020-10-13 04:48:50,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2020-10-13 04:48:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 04:48:50,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:50,443 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:50,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:48:50,443 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash 820410056, now seen corresponding path program 25 times [2020-10-13 04:48:50,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:50,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485167166] [2020-10-13 04:48:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:50,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:55,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 04:48:55,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:55,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-13 04:48:55,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:48:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:48:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:48:55,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:55,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:55,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:55,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:55,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:55,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:55,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:55,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:55,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:55,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-13 04:48:55,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485167166] [2020-10-13 04:48:55,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:55,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:48:55,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944950710] [2020-10-13 04:48:55,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:48:55,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:48:55,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:55,816 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 17 states. [2020-10-13 04:48:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:56,447 INFO L93 Difference]: Finished difference Result 499 states and 523 transitions. [2020-10-13 04:48:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:48:56,448 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 263 [2020-10-13 04:48:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:56,449 INFO L225 Difference]: With dead ends: 499 [2020-10-13 04:48:56,449 INFO L226 Difference]: Without dead ends: 292 [2020-10-13 04:48:56,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-13 04:48:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2020-10-13 04:48:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 04:48:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 293 transitions. [2020-10-13 04:48:56,458 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 293 transitions. Word has length 263 [2020-10-13 04:48:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:56,458 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 293 transitions. [2020-10-13 04:48:56,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:48:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 293 transitions. [2020-10-13 04:48:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-13 04:48:56,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:56,460 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:56,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:48:56,461 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1861687480, now seen corresponding path program 26 times [2020-10-13 04:48:56,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:56,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986440721] [2020-10-13 04:48:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:56,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:01,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:49:01,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:01,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:01,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:01,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:01,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:01,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:01,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:01,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-13 04:49:01,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986440721] [2020-10-13 04:49:01,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:01,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:49:01,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856992743] [2020-10-13 04:49:01,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:49:01,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:49:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:49:01,865 INFO L87 Difference]: Start difference. First operand 284 states and 293 transitions. Second operand 17 states. [2020-10-13 04:49:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:02,096 INFO L93 Difference]: Finished difference Result 538 states and 556 transitions. [2020-10-13 04:49:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:49:02,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 279 [2020-10-13 04:49:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:02,099 INFO L225 Difference]: With dead ends: 538 [2020-10-13 04:49:02,099 INFO L226 Difference]: Without dead ends: 287 [2020-10-13 04:49:02,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:49:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-13 04:49:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-10-13 04:49:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 04:49:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 295 transitions. [2020-10-13 04:49:02,117 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 295 transitions. Word has length 279 [2020-10-13 04:49:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:02,118 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 295 transitions. [2020-10-13 04:49:02,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:49:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 295 transitions. [2020-10-13 04:49:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-13 04:49:02,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:02,122 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:02,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:49:02,123 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash -835248042, now seen corresponding path program 27 times [2020-10-13 04:49:02,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:02,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825027908] [2020-10-13 04:49:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:02,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:07,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-13 04:49:07,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:07,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5362 [2020-10-13 04:49:07,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:07,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:49:07,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:49:07,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:49:07,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:07,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:07,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:07,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:07,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:07,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-13 04:49:07,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825027908] [2020-10-13 04:49:07,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:07,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:49:07,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439313308] [2020-10-13 04:49:07,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:49:07,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:07,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:49:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:07,880 INFO L87 Difference]: Start difference. First operand 286 states and 295 transitions. Second operand 18 states. [2020-10-13 04:49:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:08,647 INFO L93 Difference]: Finished difference Result 531 states and 555 transitions. [2020-10-13 04:49:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:49:08,650 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 281 [2020-10-13 04:49:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:08,651 INFO L225 Difference]: With dead ends: 531 [2020-10-13 04:49:08,651 INFO L226 Difference]: Without dead ends: 310 [2020-10-13 04:49:08,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-13 04:49:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2020-10-13 04:49:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-13 04:49:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 311 transitions. [2020-10-13 04:49:08,660 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 311 transitions. Word has length 281 [2020-10-13 04:49:08,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:08,661 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 311 transitions. [2020-10-13 04:49:08,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:49:08,661 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 311 transitions. [2020-10-13 04:49:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-13 04:49:08,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:08,663 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:08,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:49:08,663 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash 453879366, now seen corresponding path program 28 times [2020-10-13 04:49:08,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:08,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227360919] [2020-10-13 04:49:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:13,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:13,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-13 04:49:13,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:13,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5259 [2020-10-13 04:49:13,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:13,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:49:13,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:13,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:49:13,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:14,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:14,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:14,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:14,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:14,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:14,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:14,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1996 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-13 04:49:14,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227360919] [2020-10-13 04:49:14,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:14,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:49:14,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650550683] [2020-10-13 04:49:14,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:49:14,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:49:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:14,237 INFO L87 Difference]: Start difference. First operand 302 states and 311 transitions. Second operand 18 states. [2020-10-13 04:49:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:14,416 INFO L93 Difference]: Finished difference Result 572 states and 590 transitions. [2020-10-13 04:49:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:49:14,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 297 [2020-10-13 04:49:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:14,420 INFO L225 Difference]: With dead ends: 572 [2020-10-13 04:49:14,420 INFO L226 Difference]: Without dead ends: 305 [2020-10-13 04:49:14,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-13 04:49:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2020-10-13 04:49:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-13 04:49:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 313 transitions. [2020-10-13 04:49:14,432 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 313 transitions. Word has length 297 [2020-10-13 04:49:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:14,433 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 313 transitions. [2020-10-13 04:49:14,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:49:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 313 transitions. [2020-10-13 04:49:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-13 04:49:14,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:14,436 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:14,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:49:14,437 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1037942172, now seen corresponding path program 29 times [2020-10-13 04:49:14,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:14,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573639534] [2020-10-13 04:49:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:19,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:19,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-13 04:49:19,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:19,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5318 [2020-10-13 04:49:19,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:19,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:49:19,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 04:49:19,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:49:19,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:20,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:20,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:20,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:20,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:20,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:20,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:20,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:20,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-13 04:49:20,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573639534] [2020-10-13 04:49:20,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:20,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:49:20,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436240578] [2020-10-13 04:49:20,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:49:20,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:49:20,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:20,045 INFO L87 Difference]: Start difference. First operand 304 states and 313 transitions. Second operand 19 states. [2020-10-13 04:49:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:20,915 INFO L93 Difference]: Finished difference Result 563 states and 587 transitions. [2020-10-13 04:49:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:49:20,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 299 [2020-10-13 04:49:20,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:20,919 INFO L225 Difference]: With dead ends: 563 [2020-10-13 04:49:20,919 INFO L226 Difference]: Without dead ends: 328 [2020-10-13 04:49:20,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-13 04:49:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 320. [2020-10-13 04:49:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-13 04:49:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 329 transitions. [2020-10-13 04:49:20,934 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 329 transitions. Word has length 299 [2020-10-13 04:49:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:20,934 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 329 transitions. [2020-10-13 04:49:20,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:49:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 329 transitions. [2020-10-13 04:49:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-13 04:49:20,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:20,937 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:20,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:49:20,937 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash 838708308, now seen corresponding path program 30 times [2020-10-13 04:49:20,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:20,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668697199] [2020-10-13 04:49:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:21,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:21,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:26,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-13 04:49:26,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5187 [2020-10-13 04:49:26,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:49:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:49:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:26,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:26,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:26,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:26,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:26,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:26,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:26,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:26,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-13 04:49:26,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668697199] [2020-10-13 04:49:26,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:26,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:49:26,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344739972] [2020-10-13 04:49:26,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:49:26,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:26,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:49:26,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:26,517 INFO L87 Difference]: Start difference. First operand 320 states and 329 transitions. Second operand 19 states. [2020-10-13 04:49:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:26,684 INFO L93 Difference]: Finished difference Result 606 states and 624 transitions. [2020-10-13 04:49:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:49:26,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 315 [2020-10-13 04:49:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:26,686 INFO L225 Difference]: With dead ends: 606 [2020-10-13 04:49:26,687 INFO L226 Difference]: Without dead ends: 323 [2020-10-13 04:49:26,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-13 04:49:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2020-10-13 04:49:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-13 04:49:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2020-10-13 04:49:26,701 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 315 [2020-10-13 04:49:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:26,702 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2020-10-13 04:49:26,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:49:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2020-10-13 04:49:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-13 04:49:26,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:26,704 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:26,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:49:26,705 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1449476878, now seen corresponding path program 31 times [2020-10-13 04:49:26,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:26,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333791353] [2020-10-13 04:49:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:26,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:27,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:31,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-13 04:49:31,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:31,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-13 04:49:31,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:49:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 04:49:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:49:31,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:32,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:32,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:32,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:32,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:32,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:32,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:32,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:32,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:32,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-13 04:49:32,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333791353] [2020-10-13 04:49:32,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:32,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:49:32,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684661034] [2020-10-13 04:49:32,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:49:32,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:49:32,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:49:32,118 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 20 states. [2020-10-13 04:49:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:32,876 INFO L93 Difference]: Finished difference Result 595 states and 619 transitions. [2020-10-13 04:49:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:49:32,877 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 317 [2020-10-13 04:49:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:32,879 INFO L225 Difference]: With dead ends: 595 [2020-10-13 04:49:32,879 INFO L226 Difference]: Without dead ends: 346 [2020-10-13 04:49:32,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:49:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-13 04:49:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 338. [2020-10-13 04:49:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-13 04:49:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 347 transitions. [2020-10-13 04:49:32,889 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 347 transitions. Word has length 317 [2020-10-13 04:49:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:32,890 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 347 transitions. [2020-10-13 04:49:32,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:49:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 347 transitions. [2020-10-13 04:49:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-13 04:49:32,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:32,892 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:32,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:49:32,893 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash -755365150, now seen corresponding path program 32 times [2020-10-13 04:49:32,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:32,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059575231] [2020-10-13 04:49:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:32,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:33,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:33,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:37,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:37,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-13 04:49:37,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:49:37,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:49:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:49:37,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:38,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:38,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:38,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:38,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-13 04:49:38,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059575231] [2020-10-13 04:49:38,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:38,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:49:38,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793684833] [2020-10-13 04:49:38,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:49:38,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:38,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:49:38,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:49:38,219 INFO L87 Difference]: Start difference. First operand 338 states and 347 transitions. Second operand 20 states. [2020-10-13 04:49:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:38,428 INFO L93 Difference]: Finished difference Result 640 states and 658 transitions. [2020-10-13 04:49:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:49:38,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 333 [2020-10-13 04:49:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:38,431 INFO L225 Difference]: With dead ends: 640 [2020-10-13 04:49:38,431 INFO L226 Difference]: Without dead ends: 341 [2020-10-13 04:49:38,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:49:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-13 04:49:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2020-10-13 04:49:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 04:49:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-10-13 04:49:38,440 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 333 [2020-10-13 04:49:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:38,441 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-10-13 04:49:38,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:49:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-10-13 04:49:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-13 04:49:38,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:38,443 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 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 04:49:38,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:49:38,443 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash 312176640, now seen corresponding path program 33 times [2020-10-13 04:49:38,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:38,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87944913] [2020-10-13 04:49:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:38,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:43,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:43,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-13 04:49:43,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5418 [2020-10-13 04:49:43,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:49:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 04:49:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:49:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:44,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:44,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:44,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:49:44,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:44,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-13 04:49:44,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87944913] [2020-10-13 04:49:44,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:44,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:49:44,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788323761] [2020-10-13 04:49:44,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:49:44,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:44,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:49:44,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:44,230 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 21 states. [2020-10-13 04:49:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:44,982 INFO L93 Difference]: Finished difference Result 627 states and 651 transitions. [2020-10-13 04:49:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:49:44,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 335 [2020-10-13 04:49:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:44,986 INFO L225 Difference]: With dead ends: 627 [2020-10-13 04:49:44,987 INFO L226 Difference]: Without dead ends: 364 [2020-10-13 04:49:44,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-13 04:49:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 356. [2020-10-13 04:49:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 04:49:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 365 transitions. [2020-10-13 04:49:44,997 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 365 transitions. Word has length 335 [2020-10-13 04:49:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:44,997 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 365 transitions. [2020-10-13 04:49:44,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:49:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 365 transitions. [2020-10-13 04:49:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-13 04:49:45,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:45,000 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 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 04:49:45,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:49:45,001 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:45,001 INFO L82 PathProgramCache]: Analyzing trace with hash -29515280, now seen corresponding path program 34 times [2020-10-13 04:49:45,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:45,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522880052] [2020-10-13 04:49:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:45,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:45,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:45,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:45,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:50,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:50,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-13 04:49:50,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5268 [2020-10-13 04:49:50,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:49:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:50,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:49:50,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:50,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:50,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:50,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:50,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:50,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:50,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:50,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2881 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-13 04:49:50,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522880052] [2020-10-13 04:49:50,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:50,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:49:50,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840329090] [2020-10-13 04:49:50,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:49:50,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:49:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:50,634 INFO L87 Difference]: Start difference. First operand 356 states and 365 transitions. Second operand 21 states. [2020-10-13 04:49:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:50,861 INFO L93 Difference]: Finished difference Result 674 states and 692 transitions. [2020-10-13 04:49:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:49:50,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-10-13 04:49:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:50,864 INFO L225 Difference]: With dead ends: 674 [2020-10-13 04:49:50,865 INFO L226 Difference]: Without dead ends: 359 [2020-10-13 04:49:50,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-13 04:49:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 358. [2020-10-13 04:49:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 04:49:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 367 transitions. [2020-10-13 04:49:50,877 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 367 transitions. Word has length 351 [2020-10-13 04:49:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:50,878 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 367 transitions. [2020-10-13 04:49:50,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:49:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 367 transitions. [2020-10-13 04:49:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-13 04:49:50,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:50,881 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 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 04:49:50,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:49:50,881 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:50,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1244085134, now seen corresponding path program 35 times [2020-10-13 04:49:50,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:50,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883201257] [2020-10-13 04:49:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:50,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:55,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:49:55,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:56,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:56,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:56,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:56,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:56,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:56,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:56,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:56,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:56,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:56,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:56,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-13 04:49:56,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883201257] [2020-10-13 04:49:56,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:56,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:49:56,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588866156] [2020-10-13 04:49:56,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:49:56,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:56,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:49:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:56,289 INFO L87 Difference]: Start difference. First operand 358 states and 367 transitions. Second operand 22 states. [2020-10-13 04:49:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:57,170 INFO L93 Difference]: Finished difference Result 659 states and 683 transitions. [2020-10-13 04:49:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:49:57,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 353 [2020-10-13 04:49:57,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:57,173 INFO L225 Difference]: With dead ends: 659 [2020-10-13 04:49:57,173 INFO L226 Difference]: Without dead ends: 382 [2020-10-13 04:49:57,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-13 04:49:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 374. [2020-10-13 04:49:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-13 04:49:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 383 transitions. [2020-10-13 04:49:57,182 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 383 transitions. Word has length 353 [2020-10-13 04:49:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:57,182 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 383 transitions. [2020-10-13 04:49:57,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:49:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 383 transitions. [2020-10-13 04:49:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-10-13 04:49:57,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:57,185 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 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 04:49:57,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:49:57,185 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:57,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1661686142, now seen corresponding path program 36 times [2020-10-13 04:49:57,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:57,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586644568] [2020-10-13 04:49:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:57,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5393 [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:50:02,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:02,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:02,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:02,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:02,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:02,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:02,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:02,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:02,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:02,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:02,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3212 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-13 04:50:02,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586644568] [2020-10-13 04:50:02,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:02,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:50:02,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146546065] [2020-10-13 04:50:02,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:50:02,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:50:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:02,947 INFO L87 Difference]: Start difference. First operand 374 states and 383 transitions. Second operand 22 states. [2020-10-13 04:50:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:03,176 INFO L93 Difference]: Finished difference Result 708 states and 726 transitions. [2020-10-13 04:50:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:50:03,177 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 369 [2020-10-13 04:50:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:03,179 INFO L225 Difference]: With dead ends: 708 [2020-10-13 04:50:03,179 INFO L226 Difference]: Without dead ends: 377 [2020-10-13 04:50:03,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-13 04:50:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2020-10-13 04:50:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-13 04:50:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 385 transitions. [2020-10-13 04:50:03,189 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 385 transitions. Word has length 369 [2020-10-13 04:50:03,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:03,189 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 385 transitions. [2020-10-13 04:50:03,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:50:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 385 transitions. [2020-10-13 04:50:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-13 04:50:03,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:03,192 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 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 04:50:03,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:50:03,192 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1438056548, now seen corresponding path program 37 times [2020-10-13 04:50:03,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:03,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382830286] [2020-10-13 04:50:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:03,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5247 [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:50:08,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:08,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:08,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:08,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:08,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:08,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:08,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:08,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:08,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-13 04:50:08,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382830286] [2020-10-13 04:50:08,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:08,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:50:08,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157546756] [2020-10-13 04:50:08,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:50:08,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:08,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:50:08,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:50:08,899 INFO L87 Difference]: Start difference. First operand 376 states and 385 transitions. Second operand 23 states. [2020-10-13 04:50:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:09,757 INFO L93 Difference]: Finished difference Result 691 states and 715 transitions. [2020-10-13 04:50:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:50:09,757 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 371 [2020-10-13 04:50:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:09,760 INFO L225 Difference]: With dead ends: 691 [2020-10-13 04:50:09,760 INFO L226 Difference]: Without dead ends: 400 [2020-10-13 04:50:09,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:50:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-13 04:50:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 392. [2020-10-13 04:50:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-13 04:50:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 401 transitions. [2020-10-13 04:50:09,770 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 401 transitions. Word has length 371 [2020-10-13 04:50:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:09,771 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 401 transitions. [2020-10-13 04:50:09,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:50:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 401 transitions. [2020-10-13 04:50:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-13 04:50:09,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:09,774 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 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 04:50:09,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:50:09,774 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:09,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1381107316, now seen corresponding path program 38 times [2020-10-13 04:50:09,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:09,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121813991] [2020-10-13 04:50:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:09,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking...