/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-lopstr16/flag_loopdep_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:20:55,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:20:55,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:20:55,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:20:55,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:20:55,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:20:55,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:20:55,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:20:55,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:20:55,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:20:55,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:20:55,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:20:55,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:20:55,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:20:55,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:20:55,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:20:55,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:20:55,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:20:55,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:20:55,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:20:55,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:20:55,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:20:55,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:20:55,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:20:55,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:20:55,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:20:55,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:20:55,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:20:55,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:20:55,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:20:55,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:20:55,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:20:55,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:20:55,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:20:55,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:20:55,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:20:55,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:20:55,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:20:55,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:20:55,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:20:55,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:20:55,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:20:55,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:20:55,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:20:55,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:20:55,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:20:55,259 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:20:55,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:20:55,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:20:55,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:20:55,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:20:55,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:20:55,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:20:55,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:20:55,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:20:55,262 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:20:55,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:20:55,262 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:20:55,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:20:55,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:20:55,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:20:55,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:20:55,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:20:55,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:20:55,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:20:55,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:20:55,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:20:55,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:20:55,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:20:55,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:20:55,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:20:55,265 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:20:55,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:20:55,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:20:55,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:20:55,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:20:55,577 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:20:55,578 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep_simple.i [2020-10-14 18:20:55,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/460888010/5428b1c816dd45cc885b4f631cfeabc4/FLAGadbb6b2a8 [2020-10-14 18:20:56,108 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:20:56,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep_simple.i [2020-10-14 18:20:56,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/460888010/5428b1c816dd45cc885b4f631cfeabc4/FLAGadbb6b2a8 [2020-10-14 18:20:56,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/460888010/5428b1c816dd45cc885b4f631cfeabc4 [2020-10-14 18:20:56,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:20:56,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:20:56,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:20:56,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:20:56,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:20:56,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67578ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56, skipping insertion in model container [2020-10-14 18:20:56,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:20:56,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:20:56,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:20:56,709 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:20:56,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:20:56,744 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:20:56,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56 WrapperNode [2020-10-14 18:20:56,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:20:56,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:20:56,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:20:56,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:20:56,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... [2020-10-14 18:20:56,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:20:56,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:20:56,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:20:56,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:20:56,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:20:56,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:20:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:20:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:20:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-14 18:20:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:20:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:20:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:20:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:20:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 18:20:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:20:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:20:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:20:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:20:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:20:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:20:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:20:57,203 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:20:57,203 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 18:20:57,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:20:57 BoogieIcfgContainer [2020-10-14 18:20:57,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:20:57,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:20:57,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:20:57,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:20:57,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:20:56" (1/3) ... [2020-10-14 18:20:57,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd8619b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:20:57, skipping insertion in model container [2020-10-14 18:20:57,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:56" (2/3) ... [2020-10-14 18:20:57,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd8619b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:20:57, skipping insertion in model container [2020-10-14 18:20:57,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:20:57" (3/3) ... [2020-10-14 18:20:57,217 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2020-10-14 18:20:57,229 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:20:57,237 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:20:57,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:20:57,279 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:20:57,280 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:20:57,280 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:20:57,280 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:20:57,280 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:20:57,280 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:20:57,281 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:20:57,281 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:20:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:20:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 18:20:57,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:57,309 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] [2020-10-14 18:20:57,309 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:57,317 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2020-10-14 18:20:57,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:57,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279614474] [2020-10-14 18:20:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:57,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:57,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:57,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:57,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 18:20:57,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:57,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-14 18:20:57,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:57,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:20:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 18:20:57,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:20:57,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:57,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:57,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:57,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:57,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:20:57,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:57,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:57,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:57,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:57,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:57,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:57,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:20:57,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:57,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-14 18:20:57,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:57,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:20:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:20:57,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:57,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279614474] [2020-10-14 18:20:57,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:20:57,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 18:20:57,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347694822] [2020-10-14 18:20:57,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:20:57,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:57,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:20:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:20:57,945 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-14 18:20:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:58,207 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-14 18:20:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:20:58,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 18:20:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:58,218 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:20:58,219 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 18:20:58,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:20:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 18:20:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 18:20:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:20:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 18:20:58,268 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-14 18:20:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:58,268 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 18:20:58,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:20:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 18:20:58,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 18:20:58,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:58,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:58,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:20:58,271 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash -169907062, now seen corresponding path program 1 times [2020-10-14 18:20:58,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:58,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413663022] [2020-10-14 18:20:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:58,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:58,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:58,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 18:20:58,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:58,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-14 18:20:58,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:58,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:58,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:20:58,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:58,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:20:58,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:58,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:58,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:58,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:58,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:58,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:58,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:20:58,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:58,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:58,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:58,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:58,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:58,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:58,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:58,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:58,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 18:20:58,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:58,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 18:20:58,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:58,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:58,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:20:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:58,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:20:58,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:58,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413663022] [2020-10-14 18:20:58,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:58,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:20:58,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639757926] [2020-10-14 18:20:58,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:20:58,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:58,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:20:58,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:20:58,694 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-10-14 18:20:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:58,884 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-14 18:20:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:20:58,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 18:20:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:58,886 INFO L225 Difference]: With dead ends: 50 [2020-10-14 18:20:58,887 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 18:20:58,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:20:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 18:20:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 18:20:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 18:20:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 18:20:58,896 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-14 18:20:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:58,897 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 18:20:58,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:20:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 18:20:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 18:20:58,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:58,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:58,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:20:58,899 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1071501364, now seen corresponding path program 2 times [2020-10-14 18:20:58,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:58,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250518623] [2020-10-14 18:20:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:58,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:59,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:59,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 18:20:59,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:59,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-14 18:20:59,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:59,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:20:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:20:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:59,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:59,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:59,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:59,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:59,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:59,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:20:59,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:59,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:59,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:59,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:59,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:59,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:59,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 18:20:59,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:59,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-14 18:20:59,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:59,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:59,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:20:59,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:59,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:20:59,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:59,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250518623] [2020-10-14 18:20:59,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:59,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:20:59,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426459818] [2020-10-14 18:20:59,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:20:59,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:20:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:20:59,269 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-10-14 18:20:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:59,473 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-14 18:20:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:20:59,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 18:20:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:59,475 INFO L225 Difference]: With dead ends: 52 [2020-10-14 18:20:59,475 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 18:20:59,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:20:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 18:20:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 18:20:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 18:20:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 18:20:59,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-14 18:20:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:59,483 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 18:20:59,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:20:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 18:20:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:20:59,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:59,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:59,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:20:59,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash 79768206, now seen corresponding path program 3 times [2020-10-14 18:20:59,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:59,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488798174] [2020-10-14 18:20:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:59,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:59,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:59,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:59,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:20:59,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:59,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-14 18:20:59,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:59,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:59,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:20:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:20:59,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:59,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:59,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:59,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:59,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:59,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:59,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:20:59,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:59,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:59,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:59,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:59,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:59,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:59,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 18:20:59,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:59,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-14 18:20:59,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:59,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:20:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:59,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:20:59,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:59,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488798174] [2020-10-14 18:20:59,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:59,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:20:59,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568447408] [2020-10-14 18:20:59,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:20:59,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:20:59,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:20:59,810 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-10-14 18:21:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:00,027 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-14 18:21:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:21:00,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 18:21:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:00,029 INFO L225 Difference]: With dead ends: 54 [2020-10-14 18:21:00,029 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 18:21:00,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:21:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 18:21:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 18:21:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:21:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-14 18:21:00,043 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-14 18:21:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:00,044 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-14 18:21:00,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:21:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-14 18:21:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:21:00,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:00,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:00,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:21:00,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:00,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1651737392, now seen corresponding path program 4 times [2020-10-14 18:21:00,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:00,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470968290] [2020-10-14 18:21:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:00,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:00,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:00,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:00,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:21:00,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:00,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-14 18:21:00,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:00,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:00,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:21:00,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:00,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:21:00,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:00,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:00,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:00,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:00,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:00,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:00,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:00,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:00,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:00,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:00,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:00,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:00,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 18:21:00,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:00,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-14 18:21:00,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:00,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:21:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:21:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:00,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470968290] [2020-10-14 18:21:00,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:00,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:21:00,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564847059] [2020-10-14 18:21:00,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:21:00,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:00,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:21:00,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:21:00,445 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-10-14 18:21:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:00,680 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-14 18:21:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:21:00,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 18:21:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:00,681 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:21:00,682 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 18:21:00,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:21:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 18:21:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 18:21:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:21:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-14 18:21:00,689 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-14 18:21:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:00,689 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-14 18:21:00,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:21:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-14 18:21:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:21:00,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:00,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:00,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:21:00,691 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash 818693778, now seen corresponding path program 5 times [2020-10-14 18:21:00,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:00,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058348219] [2020-10-14 18:21:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:00,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:00,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:00,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:21:00,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-14 18:21:00,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:00,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:21:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:21:00,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:01,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:01,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:01,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:01,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:01,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:01,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:01,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:01,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:01,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:01,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:01,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 18:21:01,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:01,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-14 18:21:01,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:01,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:01,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:21:01,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:01,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:21:01,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:01,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058348219] [2020-10-14 18:21:01,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:01,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:21:01,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527294267] [2020-10-14 18:21:01,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:21:01,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:21:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:21:01,166 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-14 18:21:01,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:01,398 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-14 18:21:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:21:01,399 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 18:21:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:01,400 INFO L225 Difference]: With dead ends: 58 [2020-10-14 18:21:01,400 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:21:01,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:21:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:21:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 18:21:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:21:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-14 18:21:01,407 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-10-14 18:21:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:01,407 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-14 18:21:01,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:21:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-14 18:21:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:21:01,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:01,409 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:01,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:21:01,409 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:01,410 INFO L82 PathProgramCache]: Analyzing trace with hash -213866540, now seen corresponding path program 6 times [2020-10-14 18:21:01,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:01,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850647742] [2020-10-14 18:21:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:01,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:01,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 18:21:01,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:01,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-14 18:21:01,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:01,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:01,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:21:01,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:21:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:01,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:01,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:01,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:01,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:01,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:01,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:01,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:01,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:01,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:01,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:01,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:01,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 18:21:01,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:01,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-14 18:21:01,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:01,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:01,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:21:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:21:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:01,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850647742] [2020-10-14 18:21:01,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:01,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:21:01,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072444877] [2020-10-14 18:21:01,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:21:01,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:01,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:21:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:21:01,900 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-10-14 18:21:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:02,185 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-14 18:21:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:21:02,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 18:21:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:02,187 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:21:02,187 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:21:02,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:21:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:21:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 18:21:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:21:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-14 18:21:02,194 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-14 18:21:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:02,194 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-14 18:21:02,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:21:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-14 18:21:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:21:02,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:02,196 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:02,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:21:02,196 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash -366886762, now seen corresponding path program 7 times [2020-10-14 18:21:02,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:02,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774321621] [2020-10-14 18:21:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:02,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:02,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:02,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:02,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:21:02,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 18:21:02,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:02,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:02,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:21:02,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:02,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:21:02,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:02,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:02,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:02,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:02,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:02,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:02,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:02,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:02,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:02,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:02,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:02,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:02,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:02,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:21:02,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:02,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-14 18:21:02,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:02,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:21:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:21:02,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:02,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774321621] [2020-10-14 18:21:02,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:02,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:21:02,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793224754] [2020-10-14 18:21:02,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:21:02,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:21:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:21:02,938 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-10-14 18:21:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:03,225 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 18:21:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:21:03,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 18:21:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:03,227 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:21:03,227 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:21:03,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:21:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:21:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 18:21:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 18:21:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-14 18:21:03,235 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-14 18:21:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:03,235 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-14 18:21:03,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:21:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-14 18:21:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:21:03,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:03,237 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:03,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:21:03,237 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1390432040, now seen corresponding path program 8 times [2020-10-14 18:21:03,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:03,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865952003] [2020-10-14 18:21:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:03,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:03,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:03,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:21:03,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:03,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-14 18:21:03,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:03,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:03,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:21:03,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:03,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:21:03,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:03,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:03,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:03,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:03,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:03,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:03,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:03,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:03,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:03,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:03,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:03,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:21:03,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:03,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-14 18:21:03,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:03,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:03,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:21:03,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:03,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:21:03,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:04,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865952003] [2020-10-14 18:21:04,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:04,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:21:04,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814176840] [2020-10-14 18:21:04,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:21:04,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:21:04,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:21:04,310 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-10-14 18:21:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:04,889 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-14 18:21:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:21:04,890 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 18:21:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:04,891 INFO L225 Difference]: With dead ends: 64 [2020-10-14 18:21:04,891 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 18:21:04,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:21:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 18:21:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 18:21:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:21:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-14 18:21:04,903 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-14 18:21:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:04,904 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-14 18:21:04,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:21:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-14 18:21:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:21:04,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:04,906 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:04,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:21:04,906 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:04,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1469933414, now seen corresponding path program 9 times [2020-10-14 18:21:04,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:04,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301690580] [2020-10-14 18:21:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:04,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:04,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:05,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:05,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:21:05,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:05,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-14 18:21:05,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:05,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:21:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:21:05,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:05,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:05,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:05,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:05,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:05,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:05,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:05,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:05,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:05,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:05,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:05,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:05,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 18:21:05,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:05,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-14 18:21:05,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:05,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:21:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:21:05,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:06,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301690580] [2020-10-14 18:21:06,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:06,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:21:06,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082962275] [2020-10-14 18:21:06,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:21:06,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:06,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:21:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:21:06,111 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2020-10-14 18:21:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:06,713 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-14 18:21:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:21:06,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 18:21:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:06,715 INFO L225 Difference]: With dead ends: 66 [2020-10-14 18:21:06,715 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 18:21:06,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:21:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 18:21:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 18:21:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:21:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-14 18:21:06,725 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-14 18:21:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:06,727 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-14 18:21:06,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:21:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-14 18:21:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:21:06,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:06,731 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:06,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:21:06,731 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash -561342500, now seen corresponding path program 10 times [2020-10-14 18:21:06,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:06,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694030661] [2020-10-14 18:21:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:06,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:07,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:07,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 18:21:07,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:07,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-14 18:21:07,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:07,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:21:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:21:07,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:07,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:07,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:07,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:07,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:07,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:21:07,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:07,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:07,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:07,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:07,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:07,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 18:21:07,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-14 18:21:07,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:07,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:21:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:21:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:08,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694030661] [2020-10-14 18:21:08,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:08,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:21:08,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647749969] [2020-10-14 18:21:08,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:21:08,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:21:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:21:08,027 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 16 states. [2020-10-14 18:21:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:08,556 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-14 18:21:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:21:08,556 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 18:21:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:08,557 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:21:08,558 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:21:08,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:21:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:21:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 18:21:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:21:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-14 18:21:08,570 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-14 18:21:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:08,570 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-14 18:21:08,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:21:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-14 18:21:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:21:08,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:08,573 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:08,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:21:08,574 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash 716164766, now seen corresponding path program 11 times [2020-10-14 18:21:08,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:08,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176716252] [2020-10-14 18:21:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:08,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:08,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:09,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:09,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:21:09,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:09,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-14 18:21:09,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:09,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:21:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:21:09,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:09,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:09,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:09,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:09,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:09,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:09,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:09,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:09,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:09,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:09,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:09,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:09,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:09,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:09,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:21:09,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:09,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 18:21:09,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:09,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:09,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:21:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:21:09,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:09,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176716252] [2020-10-14 18:21:09,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:09,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:21:09,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920596514] [2020-10-14 18:21:09,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:21:09,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:21:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:21:09,668 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 17 states. [2020-10-14 18:21:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:10,194 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-14 18:21:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:21:10,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-14 18:21:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:10,196 INFO L225 Difference]: With dead ends: 70 [2020-10-14 18:21:10,197 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:21:10,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:21:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:21:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 18:21:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 18:21:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-14 18:21:10,210 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-14 18:21:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:10,210 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-14 18:21:10,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:21:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-14 18:21:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:21:10,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:10,212 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:10,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:21:10,212 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash 40000736, now seen corresponding path program 12 times [2020-10-14 18:21:10,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:10,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075919799] [2020-10-14 18:21:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:10,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:10,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:10,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:10,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:21:10,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:10,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-14 18:21:10,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:10,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:10,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:21:10,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:10,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:21:10,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:10,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:10,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:10,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:10,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:10,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:10,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:10,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:10,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:10,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:10,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:10,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:10,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:11,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:11,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:21:11,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:11,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-14 18:21:11,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:11,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:11,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:21:11,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:11,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:21:11,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:11,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075919799] [2020-10-14 18:21:11,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:11,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:21:11,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280539288] [2020-10-14 18:21:11,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:21:11,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:21:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:21:11,641 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 18 states. [2020-10-14 18:21:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:12,277 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-14 18:21:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:21:12,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 18:21:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:12,278 INFO L225 Difference]: With dead ends: 72 [2020-10-14 18:21:12,278 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 18:21:12,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:21:12,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 18:21:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 18:21:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:21:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-14 18:21:12,295 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-14 18:21:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:12,295 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-14 18:21:12,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:21:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-14 18:21:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:21:12,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:12,299 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:12,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:21:12,299 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1213570398, now seen corresponding path program 13 times [2020-10-14 18:21:12,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:12,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466331872] [2020-10-14 18:21:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:12,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:13,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:13,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 18:21:13,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:13,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-14 18:21:13,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:13,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:21:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:21:13,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:13,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:13,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:13,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:13,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:13,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:13,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:13,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:13,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:13,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:13,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:13,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:13,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 18:21:13,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:13,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-14 18:21:13,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:13,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:21:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:21:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:13,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466331872] [2020-10-14 18:21:13,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:13,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:21:13,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968345257] [2020-10-14 18:21:13,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:21:13,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:21:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:21:13,836 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 19 states. [2020-10-14 18:21:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:14,588 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-14 18:21:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:21:14,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 18:21:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:14,590 INFO L225 Difference]: With dead ends: 74 [2020-10-14 18:21:14,591 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:21:14,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:21:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:21:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 18:21:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:21:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-14 18:21:14,601 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-14 18:21:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:14,602 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-14 18:21:14,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:21:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-14 18:21:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:21:14,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:14,603 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:14,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:21:14,603 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash 990380004, now seen corresponding path program 14 times [2020-10-14 18:21:14,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:14,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488712166] [2020-10-14 18:21:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:14,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:14,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:15,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:15,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:21:15,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:15,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-14 18:21:15,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:15,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:15,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:21:15,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:15,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:21:15,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:15,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:15,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:15,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:15,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:15,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:15,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:15,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:15,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:15,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:15,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:15,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:15,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:15,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:21:15,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:15,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-14 18:21:15,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:15,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:15,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:21:15,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:15,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:21:15,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:16,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488712166] [2020-10-14 18:21:16,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:16,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:21:16,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490079704] [2020-10-14 18:21:16,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:21:16,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:21:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:21:16,139 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 20 states. [2020-10-14 18:21:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:16,776 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-14 18:21:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:21:16,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-14 18:21:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:16,777 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:21:16,777 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:21:16,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:21:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:21:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 18:21:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 18:21:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-14 18:21:16,794 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-14 18:21:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:16,795 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-14 18:21:16,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:21:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-14 18:21:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:21:16,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:16,798 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:16,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:21:16,798 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1567839398, now seen corresponding path program 15 times [2020-10-14 18:21:16,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:16,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855778743] [2020-10-14 18:21:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:16,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:16,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:21:17,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:17,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-14 18:21:17,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:21:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:21:17,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:17,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:17,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:17,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:17,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:17,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:17,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:17,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:17,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:17,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:17,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:17,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:18,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:18,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:21:18,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:18,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-14 18:21:18,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:18,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:18,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:21:18,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:18,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:21:18,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:18,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855778743] [2020-10-14 18:21:18,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:18,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:21:18,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300499497] [2020-10-14 18:21:18,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:21:18,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:18,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:21:18,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:21:18,382 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 21 states. [2020-10-14 18:21:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:18,988 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-14 18:21:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:21:18,989 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-14 18:21:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:18,990 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:21:18,990 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 18:21:18,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1050, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:21:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 18:21:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 18:21:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:21:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-14 18:21:18,998 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-14 18:21:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:18,999 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-14 18:21:18,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:21:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-14 18:21:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:21:18,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:18,999 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:19,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:21:19,000 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1839431448, now seen corresponding path program 16 times [2020-10-14 18:21:19,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:19,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628525102] [2020-10-14 18:21:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:19,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:20,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:20,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:21:20,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-14 18:21:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:20,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:21:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:21:20,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:20,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:20,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:20,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:20,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:20,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:20,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:20,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:20,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:20,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:20,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:20,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:21:20,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-14 18:21:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:20,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:21:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:21:20,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:20,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628525102] [2020-10-14 18:21:20,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:20,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:21:20,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108731404] [2020-10-14 18:21:20,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:21:20,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:21:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:21:20,655 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 22 states. [2020-10-14 18:21:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:21,261 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-14 18:21:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:21:21,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 18:21:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:21,263 INFO L225 Difference]: With dead ends: 80 [2020-10-14 18:21:21,263 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:21:21,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=566, Invalid=1156, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:21:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:21:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 18:21:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:21:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-14 18:21:21,270 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-14 18:21:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:21,270 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-14 18:21:21,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:21:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-14 18:21:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:21:21,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:21,271 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:21,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:21:21,272 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:21,272 INFO L82 PathProgramCache]: Analyzing trace with hash 833332394, now seen corresponding path program 17 times [2020-10-14 18:21:21,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:21,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194014955] [2020-10-14 18:21:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:21,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:21,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:22,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:22,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:21:22,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:22,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-14 18:21:22,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:22,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:22,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:21:22,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:22,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:21:22,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:22,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:22,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:22,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:22,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:22,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:22,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:22,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:22,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:22,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:22,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:21:22,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:22,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-14 18:21:22,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:22,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:21:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:21:22,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:22,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194014955] [2020-10-14 18:21:22,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:22,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:21:22,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256118273] [2020-10-14 18:21:22,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:21:22,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:22,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:21:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:21:22,940 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 23 states. [2020-10-14 18:21:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:23,677 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-14 18:21:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:21:23,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-14 18:21:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:23,679 INFO L225 Difference]: With dead ends: 82 [2020-10-14 18:21:23,679 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:21:23,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=625, Invalid=1267, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:21:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:21:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 18:21:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 18:21:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-14 18:21:23,686 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2020-10-14 18:21:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:23,687 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-14 18:21:23,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:21:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-14 18:21:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:21:23,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:23,688 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:23,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:21:23,688 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash 968941548, now seen corresponding path program 18 times [2020-10-14 18:21:23,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:23,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652510994] [2020-10-14 18:21:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:23,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:24,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:24,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 18:21:24,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:24,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-14 18:21:24,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:24,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:21:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:21:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:24,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:24,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:24,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:24,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:24,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:24,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:24,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:24,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:24,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:24,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:24,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:21:24,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:24,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-14 18:21:24,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:24,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:24,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:21:24,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:24,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:21:24,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:25,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652510994] [2020-10-14 18:21:25,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:25,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:21:25,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012733520] [2020-10-14 18:21:25,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:21:25,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:25,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:21:25,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:21:25,275 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 24 states. [2020-10-14 18:21:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:26,061 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-14 18:21:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:21:26,062 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-14 18:21:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:26,062 INFO L225 Difference]: With dead ends: 84 [2020-10-14 18:21:26,063 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 18:21:26,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=687, Invalid=1383, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:21:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 18:21:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 18:21:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:21:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-14 18:21:26,069 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-14 18:21:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:26,070 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-14 18:21:26,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:21:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-14 18:21:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:21:26,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:26,070 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:26,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:21:26,071 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1854647634, now seen corresponding path program 19 times [2020-10-14 18:21:26,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:26,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942477481] [2020-10-14 18:21:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:26,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:26,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:21:26,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:26,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-14 18:21:26,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:26,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:21:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:21:26,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:26,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:26,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:26,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:26,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:26,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:26,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:26,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:27,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:27,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 18:21:27,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:27,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-14 18:21:27,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:27,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:21:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:21:27,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:27,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942477481] [2020-10-14 18:21:27,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:27,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:21:27,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245920112] [2020-10-14 18:21:27,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:21:27,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:21:27,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:21:27,517 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 25 states. [2020-10-14 18:21:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:28,349 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-14 18:21:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:21:28,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 18:21:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:28,350 INFO L225 Difference]: With dead ends: 86 [2020-10-14 18:21:28,350 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:21:28,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:21:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:21:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 18:21:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:21:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-14 18:21:28,357 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-14 18:21:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:28,357 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-14 18:21:28,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:21:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-14 18:21:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:21:28,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:28,358 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:28,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:21:28,359 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:28,359 INFO L82 PathProgramCache]: Analyzing trace with hash -904520464, now seen corresponding path program 20 times [2020-10-14 18:21:28,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:28,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708930897] [2020-10-14 18:21:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:28,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:29,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:29,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:21:29,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:29,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-14 18:21:29,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:29,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:21:29,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:29,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:21:29,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:29,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:29,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:29,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:29,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:29,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:29,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:29,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:29,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:29,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:29,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:29,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:29,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:21:29,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:29,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-10-14 18:21:29,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:29,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:21:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:21:29,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:30,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708930897] [2020-10-14 18:21:30,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:30,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:21:30,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874329150] [2020-10-14 18:21:30,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:21:30,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:21:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:21:30,253 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 26 states. [2020-10-14 18:21:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:31,143 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-14 18:21:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:21:31,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-14 18:21:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:31,145 INFO L225 Difference]: With dead ends: 88 [2020-10-14 18:21:31,145 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:21:31,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=1630, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:21:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:21:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 18:21:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 18:21:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-14 18:21:31,152 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-14 18:21:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:31,152 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-14 18:21:31,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:21:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-14 18:21:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:21:31,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:31,153 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:31,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:21:31,154 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1634623154, now seen corresponding path program 21 times [2020-10-14 18:21:31,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:31,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874235976] [2020-10-14 18:21:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:31,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:32,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:32,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:21:32,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:32,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-14 18:21:32,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:32,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:21:32,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:32,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:21:32,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:32,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:32,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:32,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:32,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:32,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:32,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:32,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:32,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:21:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:32,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:32,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:32,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:21:32,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-14 18:21:32,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:32,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:21:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:21:32,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:32,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874235976] [2020-10-14 18:21:32,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:32,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:21:32,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162807105] [2020-10-14 18:21:32,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:21:32,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:32,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:21:32,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:21:32,988 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 27 states. [2020-10-14 18:21:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:33,970 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-14 18:21:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:21:33,973 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 18:21:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:33,974 INFO L225 Difference]: With dead ends: 90 [2020-10-14 18:21:33,974 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:21:33,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=891, Invalid=1761, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:21:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:21:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-14 18:21:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 18:21:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-14 18:21:33,991 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-14 18:21:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:33,991 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-14 18:21:33,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:21:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-14 18:21:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 18:21:33,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:33,993 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:33,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:21:33,993 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:33,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2084751372, now seen corresponding path program 22 times [2020-10-14 18:21:33,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:34,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971677335] [2020-10-14 18:21:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:34,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:34,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:35,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:35,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 18:21:35,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-14 18:21:35,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:35,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:21:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:21:35,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:35,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:35,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:35,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:35,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:35,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:35,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:35,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:35,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:35,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:35,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:35,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:35,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:35,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:35,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:21:35,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:35,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-14 18:21:35,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:35,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:35,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:21:35,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:35,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:21:35,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:36,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971677335] [2020-10-14 18:21:36,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:36,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:21:36,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724293395] [2020-10-14 18:21:36,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:21:36,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:36,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:21:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:21:36,248 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 28 states. [2020-10-14 18:21:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:37,281 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-14 18:21:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:21:37,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 18:21:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:37,283 INFO L225 Difference]: With dead ends: 92 [2020-10-14 18:21:37,283 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:21:37,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=965, Invalid=1897, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 18:21:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:21:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 18:21:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:21:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-14 18:21:37,290 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-14 18:21:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:37,291 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-14 18:21:37,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:21:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-14 18:21:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:21:37,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:37,291 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:37,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:21:37,292 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:37,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1304086710, now seen corresponding path program 23 times [2020-10-14 18:21:37,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:37,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637043877] [2020-10-14 18:21:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:37,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:38,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:38,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:21:38,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:38,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1450 [2020-10-14 18:21:38,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:38,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:38,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:21:38,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:38,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:21:38,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:38,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:38,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:38,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:38,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:38,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:38,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:38,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:38,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:38,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:38,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:21:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:21:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:39,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637043877] [2020-10-14 18:21:39,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:39,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:21:39,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104457447] [2020-10-14 18:21:39,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:21:39,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:21:39,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:21:39,845 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 29 states. [2020-10-14 18:21:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:40,809 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-14 18:21:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:21:40,810 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-14 18:21:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:40,811 INFO L225 Difference]: With dead ends: 94 [2020-10-14 18:21:40,811 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 18:21:40,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1042, Invalid=2038, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 18:21:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 18:21:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-14 18:21:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 18:21:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-14 18:21:40,818 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-14 18:21:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:40,819 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-14 18:21:40,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:21:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-14 18:21:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:21:40,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:40,820 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:40,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:21:40,820 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:40,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1902694152, now seen corresponding path program 24 times [2020-10-14 18:21:40,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:40,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5226437] [2020-10-14 18:21:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:42,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:42,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:21:42,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:42,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1548 [2020-10-14 18:21:42,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:42,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:42,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:21:42,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:42,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:21:42,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:42,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:42,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:42,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:42,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:42,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:42,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:42,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:42,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:42,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:21:42,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:42,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-14 18:21:42,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:42,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:42,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:21:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:21:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:43,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5226437] [2020-10-14 18:21:43,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:43,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:21:43,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051450094] [2020-10-14 18:21:43,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:21:43,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:43,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:21:43,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:21:43,350 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 30 states. [2020-10-14 18:21:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:44,345 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-14 18:21:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:21:44,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-14 18:21:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:44,347 INFO L225 Difference]: With dead ends: 96 [2020-10-14 18:21:44,347 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 18:21:44,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1122, Invalid=2184, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 18:21:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 18:21:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 18:21:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:21:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-14 18:21:44,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-14 18:21:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:44,354 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-14 18:21:44,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:21:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-14 18:21:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 18:21:44,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:44,355 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:44,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:21:44,356 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash 167415994, now seen corresponding path program 25 times [2020-10-14 18:21:44,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:44,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891274295] [2020-10-14 18:21:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:44,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:44,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:45,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:45,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 18:21:45,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:45,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-14 18:21:45,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:45,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:45,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:21:45,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:45,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:21:45,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:45,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:45,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:45,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:45,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:45,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:21:45,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:45,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:45,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:46,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:21:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-14 18:21:46,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:46,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:21:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:21:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:46,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891274295] [2020-10-14 18:21:46,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:46,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:21:46,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676572629] [2020-10-14 18:21:46,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:21:46,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:21:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:21:46,635 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 31 states. [2020-10-14 18:21:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:47,798 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-14 18:21:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:21:47,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 18:21:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:47,800 INFO L225 Difference]: With dead ends: 98 [2020-10-14 18:21:47,800 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:21:47,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1205, Invalid=2335, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 18:21:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:21:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 18:21:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:21:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-14 18:21:47,810 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 70 [2020-10-14 18:21:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:47,811 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-14 18:21:47,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:21:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-14 18:21:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:21:47,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:47,812 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:47,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:21:47,814 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:47,815 INFO L82 PathProgramCache]: Analyzing trace with hash 973408252, now seen corresponding path program 26 times [2020-10-14 18:21:47,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:47,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278936924] [2020-10-14 18:21:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:47,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:49,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:49,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:21:49,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:49,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1418 [2020-10-14 18:21:49,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:49,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:21:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:21:49,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:49,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:49,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:49,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:49,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:49,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:49,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:21:49,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:49,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:49,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:49,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:49,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:21:49,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:50,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278936924] [2020-10-14 18:21:50,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:50,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:21:50,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096134410] [2020-10-14 18:21:50,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:21:50,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:21:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:21:50,406 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 32 states. [2020-10-14 18:21:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:51,676 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-14 18:21:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:21:51,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-14 18:21:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:51,678 INFO L225 Difference]: With dead ends: 100 [2020-10-14 18:21:51,678 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 18:21:51,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1291, Invalid=2491, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 18:21:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 18:21:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-14 18:21:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 18:21:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-14 18:21:51,686 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-14 18:21:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:51,686 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-14 18:21:51,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:21:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-14 18:21:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:21:51,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:51,687 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:51,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:21:51,687 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1857112386, now seen corresponding path program 27 times [2020-10-14 18:21:51,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:51,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403897736] [2020-10-14 18:21:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:51,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:51,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:53,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:53,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 18:21:53,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:53,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1549 [2020-10-14 18:21:53,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:53,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:53,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:21:53,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:53,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:21:53,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:53,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:53,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:53,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:53,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:53,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:53,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:53,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:53,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:53,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:53,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 18:21:53,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-14 18:21:53,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:53,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:21:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:21:53,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:55,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403897736] [2020-10-14 18:21:55,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:55,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:21:55,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256332355] [2020-10-14 18:21:55,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:21:55,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:21:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:21:55,372 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 33 states. [2020-10-14 18:21:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:57,005 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-14 18:21:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:21:57,005 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 18:21:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:57,006 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:21:57,007 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 18:21:57,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1434, Invalid=2598, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 18:21:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 18:21:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 18:21:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 18:21:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-14 18:21:57,014 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-14 18:21:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:57,015 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-14 18:21:57,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:21:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-14 18:21:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:21:57,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:57,016 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:57,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:21:57,016 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:57,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1021820160, now seen corresponding path program 28 times [2020-10-14 18:21:57,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:57,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120202131] [2020-10-14 18:21:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:57,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:57,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:58,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:58,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 18:21:58,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:58,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1761 [2020-10-14 18:21:58,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:58,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:21:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:21:58,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:58,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:58,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:58,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:58,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:58,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:58,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:58,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:58,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:58,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:58,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:58,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:58,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:59,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:59,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:21:59,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:59,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-14 18:21:59,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:59,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:21:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:21:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:00,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120202131] [2020-10-14 18:22:00,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:00,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:22:00,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503236936] [2020-10-14 18:22:00,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:22:00,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:00,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:22:00,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:22:00,090 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 34 states. [2020-10-14 18:22:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:01,502 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-14 18:22:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:22:01,504 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-14 18:22:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:01,505 INFO L225 Difference]: With dead ends: 104 [2020-10-14 18:22:01,505 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 18:22:01,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1472, Invalid=2818, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 18:22:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 18:22:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 18:22:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 18:22:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-14 18:22:01,513 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-14 18:22:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:01,513 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-14 18:22:01,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:22:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-14 18:22:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:22:01,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:01,514 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:01,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:22:01,515 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1717058242, now seen corresponding path program 29 times [2020-10-14 18:22:01,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:01,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244539295] [2020-10-14 18:22:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:01,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:01,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:03,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:03,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:22:03,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:03,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1871 [2020-10-14 18:22:03,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:03,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:22:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:03,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:22:03,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:03,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:03,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:03,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:03,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:03,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:03,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:03,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:03,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:03,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:03,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:03,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:03,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:04,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:04,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:22:04,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:04,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-14 18:22:04,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:04,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:04,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:22:04,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:04,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:22:04,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:06,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244539295] [2020-10-14 18:22:06,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:06,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:22:06,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862054834] [2020-10-14 18:22:06,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:22:06,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:22:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:22:06,012 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 35 states. [2020-10-14 18:22:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:07,996 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-14 18:22:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:22:07,997 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-14 18:22:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:07,998 INFO L225 Difference]: With dead ends: 106 [2020-10-14 18:22:07,998 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:22:08,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1625, Invalid=2931, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 18:22:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:22:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 18:22:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 18:22:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-14 18:22:08,005 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2020-10-14 18:22:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:08,006 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-14 18:22:08,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:22:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-14 18:22:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 18:22:08,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:08,007 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:08,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:22:08,007 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash -174043132, now seen corresponding path program 30 times [2020-10-14 18:22:08,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:08,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774175635] [2020-10-14 18:22:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:08,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:10,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:10,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 18:22:10,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:10,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2123 [2020-10-14 18:22:10,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:10,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:10,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:22:10,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:10,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:22:10,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:10,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:10,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:10,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:10,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:10,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:10,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:10,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:22:10,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:10,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:10,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:10,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:22:10,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:11,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774175635] [2020-10-14 18:22:11,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:11,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:22:11,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078034779] [2020-10-14 18:22:11,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:22:11,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:11,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:22:11,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:22:11,715 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 36 states. [2020-10-14 18:22:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:13,286 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-14 18:22:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:22:13,287 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-14 18:22:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:13,288 INFO L225 Difference]: With dead ends: 108 [2020-10-14 18:22:13,289 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:22:13,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1665, Invalid=3165, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 18:22:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:22:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 18:22:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 18:22:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-14 18:22:13,295 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-14 18:22:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:13,296 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-14 18:22:13,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:22:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-14 18:22:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 18:22:13,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:13,297 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:13,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:22:13,297 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash -751297338, now seen corresponding path program 31 times [2020-10-14 18:22:13,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:13,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545065772] [2020-10-14 18:22:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:13,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:13,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:15,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:15,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 18:22:15,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:15,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2198 [2020-10-14 18:22:15,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:15,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:22:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:22:15,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:15,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:15,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:15,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:15,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:15,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:15,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:15,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:15,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:15,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:15,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:16,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:22:16,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:16,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-14 18:22:16,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:16,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:22:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:22:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:17,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545065772] [2020-10-14 18:22:17,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:17,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:22:17,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943817288] [2020-10-14 18:22:17,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:22:17,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:17,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:22:17,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:22:17,155 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 37 states. [2020-10-14 18:22:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:18,800 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-14 18:22:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:22:18,801 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-14 18:22:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:18,802 INFO L225 Difference]: With dead ends: 110 [2020-10-14 18:22:18,802 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 18:22:18,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1766, Invalid=3346, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 18:22:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 18:22:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 18:22:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 18:22:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-14 18:22:18,810 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-14 18:22:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:18,810 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-14 18:22:18,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:22:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-14 18:22:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 18:22:18,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:18,811 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:18,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:22:18,812 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1441808120, now seen corresponding path program 32 times [2020-10-14 18:22:18,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:18,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476145537] [2020-10-14 18:22:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:18,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:21,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:21,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2474 [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:22:21,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:21,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:21,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:21,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:21,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:21,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:22,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:22,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:22:22,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:22,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 18:22:22,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:22,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:22:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:22:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:23,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476145537] [2020-10-14 18:22:23,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:23,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:22:23,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395749525] [2020-10-14 18:22:23,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:22:23,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:22:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:22:23,140 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 38 states. [2020-10-14 18:22:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:24,727 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-14 18:22:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:22:24,727 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-14 18:22:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:24,729 INFO L225 Difference]: With dead ends: 112 [2020-10-14 18:22:24,729 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:22:24,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1870, Invalid=3532, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 18:22:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:22:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 18:22:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 18:22:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-14 18:22:24,735 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-14 18:22:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:24,736 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-14 18:22:24,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:22:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-14 18:22:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 18:22:24,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:24,737 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:24,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:22:24,737 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash 697261258, now seen corresponding path program 33 times [2020-10-14 18:22:24,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:24,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405303931] [2020-10-14 18:22:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:24,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:27,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:27,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 18:22:27,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:27,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2647 [2020-10-14 18:22:27,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:27,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:22:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:22:27,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:27,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:27,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:27,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:27,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:27,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:27,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:27,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:27,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:27,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:27,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:22:27,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:27,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:28,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:28,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:22:28,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:28,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-14 18:22:28,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:28,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:28,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:22:28,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:28,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:22:28,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:29,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405303931] [2020-10-14 18:22:29,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:29,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:22:29,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057536643] [2020-10-14 18:22:29,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:22:29,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:22:29,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:22:29,388 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 39 states. [2020-10-14 18:22:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:31,228 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-14 18:22:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:22:31,229 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-14 18:22:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:31,230 INFO L225 Difference]: With dead ends: 114 [2020-10-14 18:22:31,231 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 18:22:31,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1977, Invalid=3723, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 18:22:31,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 18:22:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 18:22:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 18:22:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-14 18:22:31,238 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2020-10-14 18:22:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:31,238 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-14 18:22:31,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:22:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-14 18:22:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 18:22:31,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:31,239 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:31,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:22:31,241 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash -946401268, now seen corresponding path program 34 times [2020-10-14 18:22:31,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:31,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576926095] [2020-10-14 18:22:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:31,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:31,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:34,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2800 [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:22:34,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:34,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:34,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:34,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:34,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:34,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:34,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:34,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:34,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:34,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:34,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:34,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:34,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:34,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:35,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:35,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:22:35,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:35,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-10-14 18:22:35,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:35,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:22:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:22:35,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:36,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576926095] [2020-10-14 18:22:36,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:36,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:22:36,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343083761] [2020-10-14 18:22:36,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:22:36,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:36,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:22:36,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:22:36,193 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 40 states. [2020-10-14 18:22:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:38,093 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-14 18:22:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:22:38,096 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-14 18:22:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:38,097 INFO L225 Difference]: With dead ends: 116 [2020-10-14 18:22:38,097 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 18:22:38,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2087, Invalid=3919, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 18:22:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 18:22:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 18:22:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 18:22:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-14 18:22:38,103 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-14 18:22:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:38,104 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-14 18:22:38,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:22:38,104 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-14 18:22:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 18:22:38,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:38,105 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:38,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:22:38,105 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash 41876174, now seen corresponding path program 35 times [2020-10-14 18:22:38,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:38,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835079584] [2020-10-14 18:22:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:38,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:38,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:41,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3096 [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:22:41,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:41,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:41,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:41,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:41,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:41,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:41,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:41,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:41,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:41,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:41,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:42,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:42,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:22:42,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-14 18:22:42,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:42,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:22:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:22:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:44,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835079584] [2020-10-14 18:22:44,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:44,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:22:44,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92713649] [2020-10-14 18:22:44,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:22:44,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:22:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:22:44,855 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 41 states. [2020-10-14 18:22:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:47,358 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-14 18:22:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:22:47,360 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-14 18:22:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:47,361 INFO L225 Difference]: With dead ends: 118 [2020-10-14 18:22:47,361 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:22:47,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2270, Invalid=4050, Unknown=0, NotChecked=0, Total=6320 [2020-10-14 18:22:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:22:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 18:22:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 18:22:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-14 18:22:47,372 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-14 18:22:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:47,373 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-14 18:22:47,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:22:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-14 18:22:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 18:22:47,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:47,374 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:47,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:22:47,375 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash 588725520, now seen corresponding path program 36 times [2020-10-14 18:22:47,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:47,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550938500] [2020-10-14 18:22:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:47,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:47,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:50,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:50,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 18:22:50,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:50,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3265 [2020-10-14 18:22:50,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:50,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:50,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:22:50,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:50,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:22:50,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:50,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:50,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:50,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:50,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:50,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:50,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:50,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:50,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:50,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:50,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:50,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:50,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:51,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:51,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:22:51,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-14 18:22:51,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:51,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:22:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:22:51,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:22:53,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550938500] [2020-10-14 18:22:53,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:53,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:22:53,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532327371] [2020-10-14 18:22:53,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:22:53,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:22:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:22:53,012 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 42 states. [2020-10-14 18:22:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:55,038 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-14 18:22:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:22:55,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-14 18:22:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:55,040 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:22:55,040 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:22:55,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2316, Invalid=4326, Unknown=0, NotChecked=0, Total=6642 [2020-10-14 18:22:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:22:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-14 18:22:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 18:22:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-14 18:22:55,048 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-14 18:22:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:55,048 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-14 18:22:55,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:22:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-14 18:22:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 18:22:55,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:55,049 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:55,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:22:55,050 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2124936914, now seen corresponding path program 37 times [2020-10-14 18:22:55,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:55,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475376097] [2020-10-14 18:22:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:55,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:55,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:58,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:58,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 18:22:58,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:58,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3602 [2020-10-14 18:22:58,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:58,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:58,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:22:58,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:22:58,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:22:58,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:58,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:58,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:58,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:58,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:58,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:58,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:58,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:58,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:58,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:22:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:58,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:59,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:59,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 18:22:59,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:23:01,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475376097] [2020-10-14 18:23:01,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:01,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:23:01,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482073978] [2020-10-14 18:23:01,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:23:01,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:01,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:23:01,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:23:01,185 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 43 states. [2020-10-14 18:23:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:03,409 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-14 18:23:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:23:03,410 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-14 18:23:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:03,411 INFO L225 Difference]: With dead ends: 122 [2020-10-14 18:23:03,411 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 18:23:03,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2435, Invalid=4537, Unknown=0, NotChecked=0, Total=6972 [2020-10-14 18:23:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 18:23:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 18:23:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 18:23:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-14 18:23:03,418 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-10-14 18:23:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:03,419 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-14 18:23:03,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:23:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-14 18:23:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 18:23:03,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:03,420 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:03,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:23:03,420 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:03,420 INFO L82 PathProgramCache]: Analyzing trace with hash 955336724, now seen corresponding path program 38 times [2020-10-14 18:23:03,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:03,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918562219] [2020-10-14 18:23:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:03,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:03,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:07,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:07,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 18:23:07,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:07,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3904 [2020-10-14 18:23:07,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:07,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:07,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:23:07,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:07,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 18:23:07,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:07,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:07,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:07,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:07,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:07,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:07,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:07,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:07,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:07,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:08,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:08,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:23:08,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:08,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-14 18:23:08,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:08,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:08,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:23:08,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:08,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:23:08,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:23:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:23:10,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918562219] [2020-10-14 18:23:10,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:10,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:23:10,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324545796] [2020-10-14 18:23:10,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:23:10,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:10,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:23:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:23:10,126 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 44 states. [2020-10-14 18:23:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:12,487 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-14 18:23:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:23:12,488 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-14 18:23:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:12,490 INFO L225 Difference]: With dead ends: 124 [2020-10-14 18:23:12,490 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 18:23:12,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2557, Invalid=4753, Unknown=0, NotChecked=0, Total=7310 [2020-10-14 18:23:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 18:23:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-14 18:23:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 18:23:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-14 18:23:12,496 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2020-10-14 18:23:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:12,497 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-14 18:23:12,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:23:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-14 18:23:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 18:23:12,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:12,498 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:12,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:23:12,498 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:12,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2043981610, now seen corresponding path program 39 times [2020-10-14 18:23:12,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:12,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413384111] [2020-10-14 18:23:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:12,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:16,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:16,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 18:23:16,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:16,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4202 [2020-10-14 18:23:16,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:16,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:23:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:23:16,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:16,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:16,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:16,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:16,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:16,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:16,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:16,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:16,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:16,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:16,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:16,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:16,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:18,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:18,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:23:18,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:18,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-14 18:23:18,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:18,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:18,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:23:18,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:18,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 18:23:18,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:23:19,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413384111] [2020-10-14 18:23:19,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:19,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:23:19,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054211262] [2020-10-14 18:23:19,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:23:19,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:19,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:23:19,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:23:19,588 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 45 states. [2020-10-14 18:23:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:22,012 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-14 18:23:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:23:22,013 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-14 18:23:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:22,014 INFO L225 Difference]: With dead ends: 126 [2020-10-14 18:23:22,014 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 18:23:22,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2682, Invalid=4974, Unknown=0, NotChecked=0, Total=7656 [2020-10-14 18:23:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 18:23:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 18:23:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 18:23:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-14 18:23:22,021 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 98 [2020-10-14 18:23:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:22,022 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-14 18:23:22,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 18:23:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-14 18:23:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 18:23:22,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:22,023 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:22,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:23:22,023 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1829122328, now seen corresponding path program 40 times [2020-10-14 18:23:22,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:22,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75831664] [2020-10-14 18:23:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:22,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:26,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:26,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4492 [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 18:23:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:26,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:26,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:26,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:26,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:26,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:26,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:26,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:26,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:26,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:28,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:28,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:23:28,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:28,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1588 [2020-10-14 18:23:28,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:28,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:28,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:23:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:28,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 18:23:28,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:23:29,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75831664] [2020-10-14 18:23:29,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:29,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 18:23:29,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307370031] [2020-10-14 18:23:29,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 18:23:29,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 18:23:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:23:29,638 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 46 states. [2020-10-14 18:23:32,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:32,111 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-14 18:23:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 18:23:32,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-14 18:23:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:32,114 INFO L225 Difference]: With dead ends: 128 [2020-10-14 18:23:32,114 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 18:23:32,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2810, Invalid=5200, Unknown=0, NotChecked=0, Total=8010 [2020-10-14 18:23:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 18:23:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-14 18:23:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 18:23:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-14 18:23:32,122 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 100 [2020-10-14 18:23:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:32,122 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-14 18:23:32,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 18:23:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-14 18:23:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 18:23:32,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:32,123 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:32,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:23:32,124 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:32,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:32,124 INFO L82 PathProgramCache]: Analyzing trace with hash 145361114, now seen corresponding path program 41 times [2020-10-14 18:23:32,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:32,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341451058] [2020-10-14 18:23:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:32,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:32,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:36,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:36,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 18:23:36,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:36,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4784 [2020-10-14 18:23:36,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:36,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:36,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:23:36,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:36,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 18:23:36,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:36,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:36,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:36,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:36,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:36,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:36,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:36,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:36,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:36,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:38,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:38,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:23:38,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:38,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-10-14 18:23:38,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:38,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:38,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:23:38,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:38,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 18:23:38,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:23:42,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341451058] [2020-10-14 18:23:42,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:42,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 18:23:42,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838760824] [2020-10-14 18:23:42,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 18:23:42,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 18:23:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:23:42,027 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 47 states. [2020-10-14 18:23:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:45,278 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-14 18:23:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 18:23:45,279 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-14 18:23:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:45,280 INFO L225 Difference]: With dead ends: 130 [2020-10-14 18:23:45,280 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 18:23:45,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3023, Invalid=5349, Unknown=0, NotChecked=0, Total=8372 [2020-10-14 18:23:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 18:23:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 18:23:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 18:23:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-14 18:23:45,288 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2020-10-14 18:23:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:45,288 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-14 18:23:45,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 18:23:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-14 18:23:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 18:23:45,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:45,289 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:45,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:23:45,289 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1253505052, now seen corresponding path program 42 times [2020-10-14 18:23:45,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:45,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699504689] [2020-10-14 18:23:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:45,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:45,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:50,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:23:50,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 18:23:50,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:50,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:50,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:50,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:50,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:50,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:50,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:23:50,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:50,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:50,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:50,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:50,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:50,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:50,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:23:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:50,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:52,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 18:23:52,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:23:53,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699504689] [2020-10-14 18:23:53,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:53,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 18:23:53,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176155600] [2020-10-14 18:23:53,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 18:23:53,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:53,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 18:23:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:23:53,876 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 48 states. [2020-10-14 18:23:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:56,507 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-14 18:23:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 18:23:56,508 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-14 18:23:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:56,509 INFO L225 Difference]: With dead ends: 132 [2020-10-14 18:23:56,509 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 18:23:56,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3075, Invalid=5667, Unknown=0, NotChecked=0, Total=8742 [2020-10-14 18:23:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 18:23:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 18:23:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 18:23:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-14 18:23:56,518 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 104 [2020-10-14 18:23:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:56,518 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-14 18:23:56,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 18:23:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-14 18:23:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 18:23:56,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:56,519 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:56,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:23:56,520 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1027940062, now seen corresponding path program 43 times [2020-10-14 18:23:56,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:56,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321208534] [2020-10-14 18:23:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:56,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:56,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:01,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:01,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 18:24:01,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 18:24:01,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:01,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:24:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 18:24:01,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:01,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:01,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:01,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:01,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:01,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:01,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:01,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:01,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:01,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:01,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:01,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:01,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:01,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:03,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:03,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 18:24:03,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:03,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1951 [2020-10-14 18:24:03,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:03,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:24:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 18:24:03,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:24:07,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321208534] [2020-10-14 18:24:07,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:07,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 18:24:07,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901887746] [2020-10-14 18:24:07,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 18:24:07,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 18:24:07,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:24:07,400 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 49 states. [2020-10-14 18:24:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:11,282 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-14 18:24:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 18:24:11,283 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-14 18:24:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:11,284 INFO L225 Difference]: With dead ends: 134 [2020-10-14 18:24:11,284 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 18:24:11,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3298, Invalid=5822, Unknown=0, NotChecked=0, Total=9120 [2020-10-14 18:24:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 18:24:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-14 18:24:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 18:24:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-14 18:24:11,292 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 106 [2020-10-14 18:24:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:11,292 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-14 18:24:11,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 18:24:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-14 18:24:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 18:24:11,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:11,293 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:24:11,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:24:11,294 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -991650528, now seen corresponding path program 44 times [2020-10-14 18:24:11,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:11,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571872203] [2020-10-14 18:24:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:11,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:11,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:16,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:16,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 18:24:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:24:16,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:16,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:24:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 18:24:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:16,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:16,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:16,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:16,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:16,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:16,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:16,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:16,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:16,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:16,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:16,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:18,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:18,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:24:18,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2194 [2020-10-14 18:24:18,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:18,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:24:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 18:24:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:24:20,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571872203] [2020-10-14 18:24:20,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:20,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 18:24:20,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34024006] [2020-10-14 18:24:20,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 18:24:20,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 18:24:20,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:24:20,640 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 50 states. [2020-10-14 18:24:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:24,061 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2020-10-14 18:24:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 18:24:24,062 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-14 18:24:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:24,063 INFO L225 Difference]: With dead ends: 136 [2020-10-14 18:24:24,064 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 18:24:24,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3352, Invalid=6154, Unknown=0, NotChecked=0, Total=9506 [2020-10-14 18:24:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 18:24:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 18:24:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 18:24:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-14 18:24:24,070 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 108 [2020-10-14 18:24:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:24,071 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-14 18:24:24,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 18:24:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-14 18:24:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 18:24:24,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:24,072 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:24:24,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:24:24,073 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash -492989726, now seen corresponding path program 45 times [2020-10-14 18:24:24,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:24,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761453761] [2020-10-14 18:24:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:24,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:28,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:28,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 18:24:28,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:28,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4810 [2020-10-14 18:24:28,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:28,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:24:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 18:24:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:28,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:28,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:28,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:28,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:28,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:31,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 18:24:31,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:24:35,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761453761] [2020-10-14 18:24:35,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:35,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 18:24:35,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248662731] [2020-10-14 18:24:35,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 18:24:35,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:35,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 18:24:35,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:24:35,914 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 51 states. [2020-10-14 18:24:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:40,627 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-14 18:24:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 18:24:40,629 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-14 18:24:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:40,630 INFO L225 Difference]: With dead ends: 138 [2020-10-14 18:24:40,630 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 18:24:40,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3585, Invalid=6315, Unknown=0, NotChecked=0, Total=9900 [2020-10-14 18:24:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 18:24:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-14 18:24:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 18:24:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-14 18:24:40,640 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 110 [2020-10-14 18:24:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:40,640 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-14 18:24:40,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 18:24:40,640 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-14 18:24:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 18:24:40,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:40,641 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:24:40,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 18:24:40,641 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1978671140, now seen corresponding path program 46 times [2020-10-14 18:24:40,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:40,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833878302] [2020-10-14 18:24:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:40,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:40,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:45,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:45,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 18:24:45,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:45,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4836 [2020-10-14 18:24:45,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:45,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 18:24:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:24:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 18:24:45,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:45,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:45,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:45,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:45,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:45,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:45,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:45,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:45,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:24:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:45,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:48,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:48,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 18:24:48,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:48,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2519 [2020-10-14 18:24:48,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:48,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 18:24:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:24:48,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 18:24:48,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:24:50,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833878302] [2020-10-14 18:24:50,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:50,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 18:24:50,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220741402] [2020-10-14 18:24:50,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 18:24:50,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:50,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 18:24:50,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:24:50,507 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 52 states. [2020-10-14 18:24:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:54,132 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-14 18:24:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 18:24:54,134 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-14 18:24:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:54,135 INFO L225 Difference]: With dead ends: 140 [2020-10-14 18:24:54,135 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 18:24:54,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3641, Invalid=6661, Unknown=0, NotChecked=0, Total=10302 [2020-10-14 18:24:54,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 18:24:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 18:24:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:24:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-10-14 18:24:54,145 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 112 [2020-10-14 18:24:54,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:54,145 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-10-14 18:24:54,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 18:24:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-10-14 18:24:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 18:24:54,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:54,146 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:24:54,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 18:24:54,146 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2127848678, now seen corresponding path program 47 times [2020-10-14 18:24:54,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:54,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548456957] [2020-10-14 18:24:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:54,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:54,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking...