/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-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:47:43,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:47:43,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:47:43,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:47:43,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:47:43,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:47:43,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:47:43,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:47:43,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:47:43,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:47:43,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:47:43,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:47:43,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:47:43,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:47:43,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:47:43,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:47:43,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:47:43,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:47:43,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:47:43,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:47:43,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:47:43,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:47:43,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:47:43,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:47:43,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:47:43,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:47:43,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:47:43,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:47:43,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:47:43,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:47:43,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:47:43,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:47:43,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:47:43,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:47:43,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:47:43,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:47:43,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:47:43,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:47:43,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:47:43,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:47:43,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:47:43,696 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 17:47:43,753 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:47:43,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:47:43,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:47:43,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:47:43,758 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:47:43,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:47:43,759 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:47:43,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:47:43,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:47:43,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:47:43,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:47:43,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:47:43,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:47:43,762 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:47:43,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:47:43,764 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:47:43,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:47:43,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:47:43,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:47:43,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:47:43,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:47:43,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:47:43,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:47:43,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:47:43,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:47:43,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:47:43,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:47:43,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:47:43,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:47:43,766 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 17:47:44,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:47:44,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:47:44,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:47:44,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:47:44,225 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:47:44,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2020-10-14 17:47:44,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca88dec39/cf8a7ddac3a74830873b0276c48668fa/FLAGce10acdc1 [2020-10-14 17:47:44,851 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:47:44,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2020-10-14 17:47:44,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca88dec39/cf8a7ddac3a74830873b0276c48668fa/FLAGce10acdc1 [2020-10-14 17:47:45,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca88dec39/cf8a7ddac3a74830873b0276c48668fa [2020-10-14 17:47:45,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:47:45,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:47:45,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:47:45,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:47:45,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:47:45,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d4dad56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45, skipping insertion in model container [2020-10-14 17:47:45,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:47:45,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:47:45,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:47:45,494 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:47:45,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:47:45,533 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:47:45,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45 WrapperNode [2020-10-14 17:47:45,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:47:45,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:47:45,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:47:45,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:47:45,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (1/1) ... [2020-10-14 17:47:45,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:47:45,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:47:45,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:47:45,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:47:45,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (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 17:47:45,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:47:45,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:47:45,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:47:45,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:47:45,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:47:45,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:47:45,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:47:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:47:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:47:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:47:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:47:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:47:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:47:45,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:47:46,013 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:47:46,014 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 17:47:46,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:46 BoogieIcfgContainer [2020-10-14 17:47:46,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:47:46,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:47:46,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:47:46,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:47:46,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:47:45" (1/3) ... [2020-10-14 17:47:46,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb695d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:46, skipping insertion in model container [2020-10-14 17:47:46,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:45" (2/3) ... [2020-10-14 17:47:46,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb695d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:46, skipping insertion in model container [2020-10-14 17:47:46,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:46" (3/3) ... [2020-10-14 17:47:46,027 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2020-10-14 17:47:46,038 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:47:46,045 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:47:46,062 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:47:46,087 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:47:46,088 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:47:46,088 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:47:46,088 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:47:46,088 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:47:46,088 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:47:46,089 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:47:46,089 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:47:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-14 17:47:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:47:46,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:46,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:46,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2020-10-14 17:47:46,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:46,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172742988] [2020-10-14 17:47:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:46,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:46,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:47:46,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:46,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-14 17:47:46,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:46,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:46,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:46,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:47:46,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:46,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:47:46,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:46,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:46,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:46,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:46,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 17:47:46,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:46,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:46,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:46,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:46,479 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 17:47:46,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172742988] [2020-10-14 17:47:46,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:47:46,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 17:47:46,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390001141] [2020-10-14 17:47:46,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 17:47:46,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:46,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 17:47:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 17:47:46,510 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-14 17:47:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:46,625 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-10-14 17:47:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 17:47:46,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 17:47:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:46,636 INFO L225 Difference]: With dead ends: 56 [2020-10-14 17:47:46,636 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 17:47:46,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 17:47:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 17:47:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 17:47:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 17:47:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-14 17:47:46,682 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2020-10-14 17:47:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:46,682 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-14 17:47:46,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 17:47:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-14 17:47:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:47:46,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:46,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:46,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:47:46,685 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2020-10-14 17:47:46,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:46,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704986679] [2020-10-14 17:47:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:46,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:47:47,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:47:47,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-14 17:47:47,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:47:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:47:47,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:47,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:47,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:47,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:47,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:47,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:47,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:47,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:47,068 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 17:47:47,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704986679] [2020-10-14 17:47:47,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:47:47,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:47:47,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709596658] [2020-10-14 17:47:47,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:47:47,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:47,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:47:47,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:47:47,072 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-10-14 17:47:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:47,179 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-14 17:47:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:47:47,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 17:47:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:47,181 INFO L225 Difference]: With dead ends: 53 [2020-10-14 17:47:47,181 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 17:47:47,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:47:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 17:47:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-14 17:47:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 17:47:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-14 17:47:47,192 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-14 17:47:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:47,192 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-14 17:47:47,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:47:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-14 17:47:47,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:47:47,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:47,194 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] [2020-10-14 17:47:47,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:47:47,194 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2020-10-14 17:47:47,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:47,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892840614] [2020-10-14 17:47:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:47:47,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:47:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-14 17:47:47,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:47:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 17:47:47,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:47,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:47,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:47,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:47,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:47,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:47,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:47,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:47:47,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892840614] [2020-10-14 17:47:47,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:47,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:47:47,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791390789] [2020-10-14 17:47:47,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:47:47,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:47,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:47:47,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:47:47,886 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-14 17:47:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:47,998 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2020-10-14 17:47:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:47:47,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 17:47:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:48,000 INFO L225 Difference]: With dead ends: 61 [2020-10-14 17:47:48,000 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 17:47:48,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:47:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 17:47:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-14 17:47:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 17:47:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-14 17:47:48,009 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2020-10-14 17:47:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:48,009 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-14 17:47:48,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:47:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-14 17:47:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:47:48,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:48,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:48,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:47:48,011 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1156579290, now seen corresponding path program 2 times [2020-10-14 17:47:48,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:48,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734663232] [2020-10-14 17:47:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:48,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:50,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:47:50,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:47:50,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2397 [2020-10-14 17:47:50,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:50,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:50,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:47:50,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:50,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:47:50,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:50,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:50,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:50,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:50,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:50,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:50,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:50,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:47:50,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734663232] [2020-10-14 17:47:50,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:50,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:47:50,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21948931] [2020-10-14 17:47:50,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:47:50,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:47:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:47:50,492 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 7 states. [2020-10-14 17:47:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:50,632 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2020-10-14 17:47:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:47:50,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-14 17:47:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:50,634 INFO L225 Difference]: With dead ends: 73 [2020-10-14 17:47:50,634 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 17:47:50,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:47:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 17:47:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2020-10-14 17:47:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 17:47:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-14 17:47:50,645 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 26 [2020-10-14 17:47:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:50,645 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-14 17:47:50,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:47:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-14 17:47:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:47:50,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:50,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:50,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:47:50,648 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1490980844, now seen corresponding path program 3 times [2020-10-14 17:47:50,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:50,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046833424] [2020-10-14 17:47:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:50,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:52,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:53,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:55,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:47:55,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:47:55,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:47:55,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:55,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:55,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:47:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:47:55,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:55,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:55,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:55,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:55,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:55,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:55,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:55,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:55,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 17:47:55,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046833424] [2020-10-14 17:47:55,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:55,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:47:55,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717290246] [2020-10-14 17:47:55,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:47:55,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:47:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:47:55,813 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 8 states. [2020-10-14 17:47:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:56,057 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2020-10-14 17:47:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:47:56,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-14 17:47:56,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:56,059 INFO L225 Difference]: With dead ends: 66 [2020-10-14 17:47:56,059 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 17:47:56,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:47:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 17:47:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-14 17:47:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 17:47:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-14 17:47:56,080 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 31 [2020-10-14 17:47:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:56,081 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-14 17:47:56,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:47:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-14 17:47:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 17:47:56,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:56,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:56,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:47:56,085 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:56,085 INFO L82 PathProgramCache]: Analyzing trace with hash 917207368, now seen corresponding path program 4 times [2020-10-14 17:47:56,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:56,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263842699] [2020-10-14 17:47:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:56,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:01,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 17:48:01,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 17:48:01,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:48:01,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:01,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:01,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:48:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:48:01,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:01,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:01,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:01,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:01,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:01,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:48:01,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:01,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:01,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 17:48:01,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263842699] [2020-10-14 17:48:01,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:01,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:48:01,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476434122] [2020-10-14 17:48:01,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:48:01,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:48:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:48:01,250 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 9 states. [2020-10-14 17:48:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:01,471 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2020-10-14 17:48:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:48:01,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-14 17:48:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:01,473 INFO L225 Difference]: With dead ends: 97 [2020-10-14 17:48:01,473 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 17:48:01,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:48:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 17:48:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-14 17:48:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:48:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-10-14 17:48:01,506 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 34 [2020-10-14 17:48:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:01,507 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-10-14 17:48:01,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:48:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-10-14 17:48:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:48:01,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:01,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:01,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:48:01,510 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:01,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1632777944, now seen corresponding path program 5 times [2020-10-14 17:48:01,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:01,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254300336] [2020-10-14 17:48:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:01,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:02,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:02,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:02,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:06,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:48:06,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 17:48:06,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:48:06,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:06,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:48:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 17:48:06,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:06,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:06,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:06,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:06,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:48:06,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:06,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:06,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 17:48:06,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254300336] [2020-10-14 17:48:06,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:06,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:48:06,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006379530] [2020-10-14 17:48:06,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:48:06,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:06,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:48:06,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:48:06,660 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 10 states. [2020-10-14 17:48:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:06,832 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-10-14 17:48:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:48:06,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-14 17:48:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:06,834 INFO L225 Difference]: With dead ends: 80 [2020-10-14 17:48:06,834 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 17:48:06,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:48:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 17:48:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-14 17:48:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 17:48:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-10-14 17:48:06,851 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 41 [2020-10-14 17:48:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:06,851 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-10-14 17:48:06,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:48:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-10-14 17:48:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:48:06,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:06,856 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:06,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:48:06,856 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash 75556492, now seen corresponding path program 6 times [2020-10-14 17:48:06,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:06,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874712276] [2020-10-14 17:48:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:06,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:07,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:07,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:07,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:11,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:11,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:48:11,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:48:11,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:48:11,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:11,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:11,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:48:11,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 17:48:11,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:48:11,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:11,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:11,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:11,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:11,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:11,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:11,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:11,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:11,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:11,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 17:48:12,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874712276] [2020-10-14 17:48:12,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:12,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:48:12,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789361193] [2020-10-14 17:48:12,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:48:12,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:48:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:48:12,005 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 10 states. [2020-10-14 17:48:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:12,339 INFO L93 Difference]: Finished difference Result 249 states and 351 transitions. [2020-10-14 17:48:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:48:12,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-14 17:48:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:12,344 INFO L225 Difference]: With dead ends: 249 [2020-10-14 17:48:12,349 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 17:48:12,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:48:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 17:48:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 69. [2020-10-14 17:48:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 17:48:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2020-10-14 17:48:12,376 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 44 [2020-10-14 17:48:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:12,376 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2020-10-14 17:48:12,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:48:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2020-10-14 17:48:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 17:48:12,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:12,378 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:12,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:48:12,379 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1779748989, now seen corresponding path program 1 times [2020-10-14 17:48:12,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:12,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249733229] [2020-10-14 17:48:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:12,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:13,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:13,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:13,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:17,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 17:48:17,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 17:48:17,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:48:17,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:17,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:48:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 17:48:17,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:48:17,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:17,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:17,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:17,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:17,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:17,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:17,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:17,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:17,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:17,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:17,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 76 proven. 26 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 17:48:17,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249733229] [2020-10-14 17:48:17,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:17,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:48:17,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225058861] [2020-10-14 17:48:17,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:48:17,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:48:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:48:17,488 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand 10 states. [2020-10-14 17:48:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:17,746 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2020-10-14 17:48:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:48:17,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-14 17:48:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:17,748 INFO L225 Difference]: With dead ends: 149 [2020-10-14 17:48:17,748 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 17:48:17,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:48:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 17:48:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2020-10-14 17:48:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 17:48:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2020-10-14 17:48:17,760 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 61 [2020-10-14 17:48:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:17,761 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2020-10-14 17:48:17,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:48:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2020-10-14 17:48:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 17:48:17,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:17,762 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:17,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:48:17,763 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:17,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1063939297, now seen corresponding path program 2 times [2020-10-14 17:48:17,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:17,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475688975] [2020-10-14 17:48:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:17,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:19,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:19,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:22,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:22,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 17:48:22,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:48:22,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:48:22,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:22,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:48:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:48:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:48:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:22,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:22,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:22,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:22,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:22,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:22,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:22,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:22,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:22,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:22,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:22,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 147 proven. 44 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-14 17:48:22,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475688975] [2020-10-14 17:48:22,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:22,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:48:22,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114367821] [2020-10-14 17:48:22,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:48:22,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:22,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:48:22,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:48:22,889 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 11 states. [2020-10-14 17:48:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:23,202 INFO L93 Difference]: Finished difference Result 174 states and 226 transitions. [2020-10-14 17:48:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:48:23,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-10-14 17:48:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:23,204 INFO L225 Difference]: With dead ends: 174 [2020-10-14 17:48:23,204 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 17:48:23,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:48:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 17:48:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2020-10-14 17:48:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 17:48:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2020-10-14 17:48:23,233 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 73 [2020-10-14 17:48:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:23,234 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2020-10-14 17:48:23,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:48:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2020-10-14 17:48:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 17:48:23,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:23,238 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:23,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:48:23,239 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:23,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1504762147, now seen corresponding path program 1 times [2020-10-14 17:48:23,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:23,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533856970] [2020-10-14 17:48:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:23,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:23,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:23,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:23,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:23,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:26,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:26,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:26,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:28,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 17:48:28,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 17:48:28,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:48:28,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:28,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:28,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:48:28,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:48:28,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:48:28,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:28,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:28,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:28,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:28,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:28,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:28,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:28,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:28,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 147 proven. 44 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-14 17:48:28,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533856970] [2020-10-14 17:48:28,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:28,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:48:28,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523629810] [2020-10-14 17:48:28,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:48:28,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:28,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:48:28,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:48:28,350 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand 10 states. [2020-10-14 17:48:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:28,679 INFO L93 Difference]: Finished difference Result 203 states and 262 transitions. [2020-10-14 17:48:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:48:28,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-14 17:48:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:28,681 INFO L225 Difference]: With dead ends: 203 [2020-10-14 17:48:28,681 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 17:48:28,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:48:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 17:48:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2020-10-14 17:48:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 17:48:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2020-10-14 17:48:28,702 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 73 [2020-10-14 17:48:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:28,702 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2020-10-14 17:48:28,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:48:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2020-10-14 17:48:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 17:48:28,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:28,704 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:28,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:48:28,704 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:28,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1588848721, now seen corresponding path program 3 times [2020-10-14 17:48:28,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:28,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598480610] [2020-10-14 17:48:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:28,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:32,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:33,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:33,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:33,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:33,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 17:48:33,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 17:48:33,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:48:33,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:33,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:33,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:48:33,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:48:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:48:33,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:33,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:33,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:33,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:33,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:33,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:33,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:33,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:33,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:33,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:33,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:33,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:33,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 281 proven. 104 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-10-14 17:48:33,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598480610] [2020-10-14 17:48:33,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:33,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:48:33,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621524842] [2020-10-14 17:48:33,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:48:33,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:48:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:48:33,822 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand 12 states. [2020-10-14 17:48:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:34,113 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2020-10-14 17:48:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:48:34,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-10-14 17:48:34,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:34,115 INFO L225 Difference]: With dead ends: 150 [2020-10-14 17:48:34,115 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 17:48:34,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:48:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 17:48:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-14 17:48:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 17:48:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2020-10-14 17:48:34,130 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 91 [2020-10-14 17:48:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:34,131 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2020-10-14 17:48:34,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:48:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2020-10-14 17:48:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 17:48:34,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:34,134 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:34,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:48:34,135 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash 402761678, now seen corresponding path program 4 times [2020-10-14 17:48:34,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:34,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078747320] [2020-10-14 17:48:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:34,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:35,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:39,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:39,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 17:48:39,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:48:39,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 17:48:39,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:39,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:48:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:48:39,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:48:39,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:39,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:39,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:39,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:39,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:39,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:39,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:39,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:39,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:39,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:39,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:39,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:39,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 327 proven. 229 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-14 17:48:39,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078747320] [2020-10-14 17:48:39,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:39,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:48:39,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685648013] [2020-10-14 17:48:39,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:48:39,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:48:39,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:48:39,331 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand 15 states. [2020-10-14 17:48:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:40,064 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2020-10-14 17:48:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:48:40,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2020-10-14 17:48:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:40,066 INFO L225 Difference]: With dead ends: 170 [2020-10-14 17:48:40,066 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 17:48:40,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=1036, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:48:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 17:48:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 118. [2020-10-14 17:48:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 17:48:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2020-10-14 17:48:40,086 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 100 [2020-10-14 17:48:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:40,088 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2020-10-14 17:48:40,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:48:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2020-10-14 17:48:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 17:48:40,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:40,089 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:40,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:48:40,090 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2104587854, now seen corresponding path program 1 times [2020-10-14 17:48:40,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:40,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877216210] [2020-10-14 17:48:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:40,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:40,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:40,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:40,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:45,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:45,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 17:48:45,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:48:45,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:48:45,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:45,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:45,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:48:45,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:48:45,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 17:48:45,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:45,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:45,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:45,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:45,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:45,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:45,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:45,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:45,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:45,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:45,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:45,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 382 proven. 172 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:48:45,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877216210] [2020-10-14 17:48:45,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:45,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:48:45,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962432887] [2020-10-14 17:48:45,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:48:45,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:45,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:48:45,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:48:45,242 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 14 states. [2020-10-14 17:48:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:46,015 INFO L93 Difference]: Finished difference Result 199 states and 254 transitions. [2020-10-14 17:48:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:48:46,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 100 [2020-10-14 17:48:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:46,018 INFO L225 Difference]: With dead ends: 199 [2020-10-14 17:48:46,019 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 17:48:46,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:48:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 17:48:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2020-10-14 17:48:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 17:48:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2020-10-14 17:48:46,041 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 100 [2020-10-14 17:48:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:46,042 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2020-10-14 17:48:46,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:48:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2020-10-14 17:48:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 17:48:46,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:46,045 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:46,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:48:46,045 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash -711272498, now seen corresponding path program 2 times [2020-10-14 17:48:46,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:46,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689666025] [2020-10-14 17:48:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:46,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:47,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:47,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:48,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:48,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:49,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:49,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:51,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:51,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 17:48:51,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 17:48:51,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:48:51,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:51,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:48:51,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:48:51,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 17:48:51,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:51,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:51,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:51,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:51,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:51,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:51,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:51,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:51,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:51,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:51,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:51,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 382 proven. 172 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:48:51,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689666025] [2020-10-14 17:48:51,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:51,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:48:51,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840717433] [2020-10-14 17:48:51,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:48:51,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:48:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:48:51,194 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand 13 states. [2020-10-14 17:48:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:51,661 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2020-10-14 17:48:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:48:51,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 100 [2020-10-14 17:48:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:51,663 INFO L225 Difference]: With dead ends: 176 [2020-10-14 17:48:51,663 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 17:48:51,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:48:51,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 17:48:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2020-10-14 17:48:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 17:48:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 141 transitions. [2020-10-14 17:48:51,680 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 141 transitions. Word has length 100 [2020-10-14 17:48:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:51,680 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 141 transitions. [2020-10-14 17:48:51,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:48:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 141 transitions. [2020-10-14 17:48:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 17:48:51,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:51,685 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:51,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:48:51,685 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1096134080, now seen corresponding path program 5 times [2020-10-14 17:48:51,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:51,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854172805] [2020-10-14 17:48:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:51,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:51,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:51,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:52,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:53,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:53,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:56,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:56,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 17:48:56,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:48:56,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:48:56,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:56,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:56,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:48:56,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:48:56,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 17:48:56,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:56,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:56,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:56,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:56,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:56,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:56,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:56,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:56,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:56,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:56,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:56,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:56,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-14 17:48:56,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854172805] [2020-10-14 17:48:56,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:56,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:48:56,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936148058] [2020-10-14 17:48:56,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:48:56,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:56,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:48:56,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:48:56,861 INFO L87 Difference]: Start difference. First operand 112 states and 141 transitions. Second operand 16 states. [2020-10-14 17:48:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:57,702 INFO L93 Difference]: Finished difference Result 195 states and 249 transitions. [2020-10-14 17:48:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 17:48:57,703 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2020-10-14 17:48:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:57,705 INFO L225 Difference]: With dead ends: 195 [2020-10-14 17:48:57,705 INFO L226 Difference]: Without dead ends: 164 [2020-10-14 17:48:57,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1809, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:48:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-14 17:48:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 127. [2020-10-14 17:48:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 17:48:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 161 transitions. [2020-10-14 17:48:57,722 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 161 transitions. Word has length 106 [2020-10-14 17:48:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:57,722 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 161 transitions. [2020-10-14 17:48:57,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:48:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 161 transitions. [2020-10-14 17:48:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 17:48:57,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:57,724 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:57,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:48:57,724 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:57,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1631020546, now seen corresponding path program 3 times [2020-10-14 17:48:57,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:57,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623192283] [2020-10-14 17:48:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:57,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:57,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:58,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:58,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:02,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:02,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 17:49:02,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:49:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:49:02,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:02,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:49:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:49:02,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 17:49:02,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:02,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:02,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:02,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:02,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:02,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:02,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:02,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:02,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:02,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:02,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:02,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-14 17:49:02,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623192283] [2020-10-14 17:49:02,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:02,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:49:02,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146312431] [2020-10-14 17:49:02,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:49:02,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:49:02,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:49:02,900 INFO L87 Difference]: Start difference. First operand 127 states and 161 transitions. Second operand 15 states. [2020-10-14 17:49:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:03,480 INFO L93 Difference]: Finished difference Result 175 states and 223 transitions. [2020-10-14 17:49:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:49:03,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 106 [2020-10-14 17:49:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:03,482 INFO L225 Difference]: With dead ends: 175 [2020-10-14 17:49:03,483 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 17:49:03,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=421, Invalid=839, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:49:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 17:49:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2020-10-14 17:49:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 17:49:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2020-10-14 17:49:03,495 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 106 [2020-10-14 17:49:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:03,495 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2020-10-14 17:49:03,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:49:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2020-10-14 17:49:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 17:49:03,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:03,496 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:03,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:49:03,497 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash -851249587, now seen corresponding path program 6 times [2020-10-14 17:49:03,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:03,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138499459] [2020-10-14 17:49:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:03,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:03,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:03,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:03,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:03,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:04,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:05,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:08,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:08,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 17:49:08,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 17:49:08,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:49:08,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:08,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:08,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:49:08,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:49:08,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 17:49:08,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:08,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:08,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:08,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 11 proven. 681 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-14 17:49:08,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138499459] [2020-10-14 17:49:08,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:08,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:49:08,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526311476] [2020-10-14 17:49:08,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:49:08,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:49:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:49:08,600 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand 11 states. [2020-10-14 17:49:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:08,840 INFO L93 Difference]: Finished difference Result 334 states and 436 transitions. [2020-10-14 17:49:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:49:08,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-10-14 17:49:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:08,842 INFO L225 Difference]: With dead ends: 334 [2020-10-14 17:49:08,842 INFO L226 Difference]: Without dead ends: 238 [2020-10-14 17:49:08,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:49:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-14 17:49:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2020-10-14 17:49:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-14 17:49:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 280 transitions. [2020-10-14 17:49:08,865 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 280 transitions. Word has length 109 [2020-10-14 17:49:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:08,865 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 280 transitions. [2020-10-14 17:49:08,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:49:08,865 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 280 transitions. [2020-10-14 17:49:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 17:49:08,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:08,867 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:08,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:49:08,867 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:08,868 INFO L82 PathProgramCache]: Analyzing trace with hash -39193619, now seen corresponding path program 2 times [2020-10-14 17:49:08,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:08,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577413178] [2020-10-14 17:49:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:08,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:09,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:09,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:09,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:09,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:09,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:13,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-14 17:49:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:13,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:13,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:13,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:13,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:13,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:13,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:13,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:13,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:13,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:13,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:13,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 681 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-14 17:49:13,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577413178] [2020-10-14 17:49:13,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:13,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:49:13,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248578266] [2020-10-14 17:49:13,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:49:13,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:13,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:49:13,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:49:13,999 INFO L87 Difference]: Start difference. First operand 216 states and 280 transitions. Second operand 11 states. [2020-10-14 17:49:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:14,176 INFO L93 Difference]: Finished difference Result 252 states and 325 transitions. [2020-10-14 17:49:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:49:14,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 111 [2020-10-14 17:49:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:14,179 INFO L225 Difference]: With dead ends: 252 [2020-10-14 17:49:14,180 INFO L226 Difference]: Without dead ends: 239 [2020-10-14 17:49:14,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:49:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-14 17:49:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 138. [2020-10-14 17:49:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-14 17:49:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2020-10-14 17:49:14,194 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 111 [2020-10-14 17:49:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:14,194 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2020-10-14 17:49:14,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:49:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2020-10-14 17:49:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 17:49:14,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:14,196 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:14,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:49:14,196 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:14,197 INFO L82 PathProgramCache]: Analyzing trace with hash -208647223, now seen corresponding path program 7 times [2020-10-14 17:49:14,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:14,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063719289] [2020-10-14 17:49:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:14,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:14,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:18,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:18,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:18,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:19,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 17:49:19,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:49:19,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:49:19,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:19,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:19,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:49:19,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 17:49:19,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 17:49:19,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:19,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:19,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:19,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:19,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:19,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:19,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:19,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:19,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 11 proven. 1135 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2020-10-14 17:49:19,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063719289] [2020-10-14 17:49:19,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:19,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:49:19,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546027791] [2020-10-14 17:49:19,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:49:19,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:49:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:49:19,309 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand 12 states. [2020-10-14 17:49:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:19,598 INFO L93 Difference]: Finished difference Result 399 states and 522 transitions. [2020-10-14 17:49:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:49:19,599 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2020-10-14 17:49:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:19,601 INFO L225 Difference]: With dead ends: 399 [2020-10-14 17:49:19,601 INFO L226 Difference]: Without dead ends: 282 [2020-10-14 17:49:19,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:49:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-14 17:49:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 260. [2020-10-14 17:49:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-14 17:49:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 338 transitions. [2020-10-14 17:49:19,621 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 338 transitions. Word has length 132 [2020-10-14 17:49:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:19,621 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 338 transitions. [2020-10-14 17:49:19,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:49:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 338 transitions. [2020-10-14 17:49:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 17:49:19,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:19,624 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:19,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:49:19,624 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash -912703639, now seen corresponding path program 3 times [2020-10-14 17:49:19,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:19,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414435624] [2020-10-14 17:49:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:19,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:24,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:24,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 17:49:24,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:49:24,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:49:24,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:24,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:49:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 17:49:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:24,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:24,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:24,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:24,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:24,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:24,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:24,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:24,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:24,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-10-14 17:49:24,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414435624] [2020-10-14 17:49:24,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:24,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:49:24,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040916947] [2020-10-14 17:49:24,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:49:24,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:49:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:49:24,789 INFO L87 Difference]: Start difference. First operand 260 states and 338 transitions. Second operand 12 states. [2020-10-14 17:49:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:24,966 INFO L93 Difference]: Finished difference Result 296 states and 383 transitions. [2020-10-14 17:49:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:49:24,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 134 [2020-10-14 17:49:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:24,968 INFO L225 Difference]: With dead ends: 296 [2020-10-14 17:49:24,969 INFO L226 Difference]: Without dead ends: 283 [2020-10-14 17:49:24,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:49:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-14 17:49:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 161. [2020-10-14 17:49:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 17:49:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2020-10-14 17:49:24,983 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 134 [2020-10-14 17:49:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:24,983 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2020-10-14 17:49:24,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:49:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2020-10-14 17:49:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-14 17:49:24,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:24,985 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:24,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:49:24,986 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash 191382089, now seen corresponding path program 8 times [2020-10-14 17:49:24,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:24,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188132184] [2020-10-14 17:49:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:25,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:25,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:25,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:25,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:26,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:28,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:30,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:30,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-14 17:49:30,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:49:30,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:49:30,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:30,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:49:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 17:49:30,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 17:49:30,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:30,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:30,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:30,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:30,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:30,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:30,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:30,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:30,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1269 proven. 492 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-14 17:49:30,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188132184] [2020-10-14 17:49:30,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:30,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:49:30,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464222653] [2020-10-14 17:49:30,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:49:30,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:49:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:49:30,183 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 18 states. [2020-10-14 17:49:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:31,360 INFO L93 Difference]: Finished difference Result 289 states and 373 transitions. [2020-10-14 17:49:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 17:49:31,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2020-10-14 17:49:31,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:31,364 INFO L225 Difference]: With dead ends: 289 [2020-10-14 17:49:31,364 INFO L226 Difference]: Without dead ends: 253 [2020-10-14 17:49:31,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1230, Invalid=3060, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 17:49:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-14 17:49:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 197. [2020-10-14 17:49:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-14 17:49:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 253 transitions. [2020-10-14 17:49:31,383 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 253 transitions. Word has length 155 [2020-10-14 17:49:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:31,384 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 253 transitions. [2020-10-14 17:49:31,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:49:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 253 transitions. [2020-10-14 17:49:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-14 17:49:31,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:31,386 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 21, 12, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:31,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:49:31,387 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash 156129865, now seen corresponding path program 4 times [2020-10-14 17:49:31,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:31,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934969513] [2020-10-14 17:49:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:31,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:31,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:33,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:33,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:33,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:36,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:36,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-14 17:49:36,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 17:49:36,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 17:49:36,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:36,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:36,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:49:36,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 17:49:36,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 17:49:36,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:36,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:36,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:36,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:36,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:36,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:36,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:36,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:36,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1269 proven. 492 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-14 17:49:36,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934969513] [2020-10-14 17:49:36,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:36,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:49:36,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612359992] [2020-10-14 17:49:36,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:49:36,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:36,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:49:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:49:36,608 INFO L87 Difference]: Start difference. First operand 197 states and 253 transitions. Second operand 17 states. [2020-10-14 17:49:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:37,446 INFO L93 Difference]: Finished difference Result 255 states and 328 transitions. [2020-10-14 17:49:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:49:37,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 155 [2020-10-14 17:49:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:37,449 INFO L225 Difference]: With dead ends: 255 [2020-10-14 17:49:37,449 INFO L226 Difference]: Without dead ends: 201 [2020-10-14 17:49:37,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=661, Invalid=1319, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:49:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-14 17:49:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 167. [2020-10-14 17:49:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 17:49:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2020-10-14 17:49:37,464 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 155 [2020-10-14 17:49:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:37,464 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2020-10-14 17:49:37,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:49:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2020-10-14 17:49:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 17:49:37,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:37,466 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:37,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:49:37,466 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash 586009211, now seen corresponding path program 9 times [2020-10-14 17:49:37,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:37,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213501195] [2020-10-14 17:49:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:37,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:37,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:37,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:38,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:38,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:41,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:42,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:42,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:42,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:42,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:42,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:42,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 17:49:42,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:49:42,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 17:49:42,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:42,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:49:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 17:49:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-14 17:49:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:42,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:42,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:42,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:42,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:42,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:42,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:42,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:42,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:42,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:42,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 13 proven. 1891 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-10-14 17:49:42,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213501195] [2020-10-14 17:49:42,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:42,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:49:42,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626820349] [2020-10-14 17:49:42,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:49:42,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:42,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:49:42,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:49:42,632 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand 13 states. [2020-10-14 17:49:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:42,938 INFO L93 Difference]: Finished difference Result 488 states and 640 transitions. [2020-10-14 17:49:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:49:42,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 161 [2020-10-14 17:49:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:42,940 INFO L225 Difference]: With dead ends: 488 [2020-10-14 17:49:42,940 INFO L226 Difference]: Without dead ends: 344 [2020-10-14 17:49:42,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:49:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-14 17:49:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 319. [2020-10-14 17:49:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-14 17:49:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 416 transitions. [2020-10-14 17:49:42,964 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 416 transitions. Word has length 161 [2020-10-14 17:49:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:42,964 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 416 transitions. [2020-10-14 17:49:42,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:49:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 416 transitions. [2020-10-14 17:49:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-14 17:49:42,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:42,967 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:42,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:49:42,967 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1078036201, now seen corresponding path program 4 times [2020-10-14 17:49:42,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:42,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692184222] [2020-10-14 17:49:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:43,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:43,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:43,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:44,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:47,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:47,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-14 17:49:47,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:49:47,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 17:49:47,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:47,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:47,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:49:47,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-14 17:49:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:48,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:48,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:48,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:48,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:48,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:48,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:48,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:48,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2238 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-10-14 17:49:48,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692184222] [2020-10-14 17:49:48,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:48,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:49:48,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968292484] [2020-10-14 17:49:48,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:49:48,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:49:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:49:48,159 INFO L87 Difference]: Start difference. First operand 319 states and 416 transitions. Second operand 13 states. [2020-10-14 17:49:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:48,356 INFO L93 Difference]: Finished difference Result 358 states and 465 transitions. [2020-10-14 17:49:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:49:48,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-10-14 17:49:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:48,359 INFO L225 Difference]: With dead ends: 358 [2020-10-14 17:49:48,359 INFO L226 Difference]: Without dead ends: 345 [2020-10-14 17:49:48,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:49:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-14 17:49:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 193. [2020-10-14 17:49:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 17:49:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 247 transitions. [2020-10-14 17:49:48,374 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 247 transitions. Word has length 163 [2020-10-14 17:49:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:48,374 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 247 transitions. [2020-10-14 17:49:48,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:49:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 247 transitions. [2020-10-14 17:49:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-14 17:49:48,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:48,376 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:48,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:49:48,376 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1575901486, now seen corresponding path program 10 times [2020-10-14 17:49:48,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:48,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859992082] [2020-10-14 17:49:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:48,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:53,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:53,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-14 17:49:53,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:49:53,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 17:49:53,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:53,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:49:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 17:49:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-14 17:49:53,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:53,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:53,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:53,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:53,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 2068 proven. 742 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-10-14 17:49:53,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859992082] [2020-10-14 17:49:53,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:53,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:49:53,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758535077] [2020-10-14 17:49:53,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:49:53,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:49:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:49:53,601 INFO L87 Difference]: Start difference. First operand 193 states and 247 transitions. Second operand 20 states. [2020-10-14 17:49:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:55,107 INFO L93 Difference]: Finished difference Result 349 states and 452 transitions. [2020-10-14 17:49:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-14 17:49:55,108 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 187 [2020-10-14 17:49:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:55,110 INFO L225 Difference]: With dead ends: 349 [2020-10-14 17:49:55,111 INFO L226 Difference]: Without dead ends: 310 [2020-10-14 17:49:55,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1929, Invalid=4877, Unknown=0, NotChecked=0, Total=6806 [2020-10-14 17:49:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-14 17:49:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 235. [2020-10-14 17:49:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 17:49:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 303 transitions. [2020-10-14 17:49:55,132 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 303 transitions. Word has length 187 [2020-10-14 17:49:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:55,132 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 303 transitions. [2020-10-14 17:49:55,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:49:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 303 transitions. [2020-10-14 17:49:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-14 17:49:55,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:55,134 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 28, 14, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:55,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:49:55,135 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1626265294, now seen corresponding path program 5 times [2020-10-14 17:49:55,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:55,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86557163] [2020-10-14 17:49:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:55,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:55,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:55,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:55,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:00,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 17:50:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-14 17:50:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:00,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:00,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:00,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:00,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:00,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:00,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:00,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:00,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:00,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:00,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:00,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:00,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 2068 proven. 742 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-10-14 17:50:00,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86557163] [2020-10-14 17:50:00,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:00,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:50:00,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205424387] [2020-10-14 17:50:00,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:50:00,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:50:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:50:00,436 INFO L87 Difference]: Start difference. First operand 235 states and 303 transitions. Second operand 19 states. [2020-10-14 17:50:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:01,510 INFO L93 Difference]: Finished difference Result 299 states and 386 transitions. [2020-10-14 17:50:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 17:50:01,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 187 [2020-10-14 17:50:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:01,514 INFO L225 Difference]: With dead ends: 299 [2020-10-14 17:50:01,514 INFO L226 Difference]: Without dead ends: 239 [2020-10-14 17:50:01,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=991, Invalid=1979, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 17:50:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-14 17:50:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 199. [2020-10-14 17:50:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 17:50:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 255 transitions. [2020-10-14 17:50:01,529 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 255 transitions. Word has length 187 [2020-10-14 17:50:01,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:01,530 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 255 transitions. [2020-10-14 17:50:01,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:50:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 255 transitions. [2020-10-14 17:50:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-14 17:50:01,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:01,531 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:01,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:50:01,532 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash 494952160, now seen corresponding path program 11 times [2020-10-14 17:50:01,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:01,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585762373] [2020-10-14 17:50:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:01,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:02,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:02,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:06,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:06,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 17:50:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-14 17:50:06,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:06,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:06,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:06,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:06,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:06,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:06,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:06,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:06,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:06,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:06,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:06,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:06,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 15 proven. 2971 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-10-14 17:50:06,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585762373] [2020-10-14 17:50:06,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:06,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:50:06,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437634453] [2020-10-14 17:50:06,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:50:06,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:06,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:50:06,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:50:06,708 INFO L87 Difference]: Start difference. First operand 199 states and 255 transitions. Second operand 14 states. [2020-10-14 17:50:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:07,056 INFO L93 Difference]: Finished difference Result 586 states and 770 transitions. [2020-10-14 17:50:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:50:07,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 193 [2020-10-14 17:50:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:07,059 INFO L225 Difference]: With dead ends: 586 [2020-10-14 17:50:07,059 INFO L226 Difference]: Without dead ends: 412 [2020-10-14 17:50:07,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:50:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-14 17:50:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 384. [2020-10-14 17:50:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-14 17:50:07,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 502 transitions. [2020-10-14 17:50:07,090 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 502 transitions. Word has length 193 [2020-10-14 17:50:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:07,091 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 502 transitions. [2020-10-14 17:50:07,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:50:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 502 transitions. [2020-10-14 17:50:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-14 17:50:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:07,093 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:07,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:50:07,093 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:07,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1548513406, now seen corresponding path program 5 times [2020-10-14 17:50:07,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:07,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862031093] [2020-10-14 17:50:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:07,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:07,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:07,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:12,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:12,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-14 17:50:12,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:50:12,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:50:12,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:12,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:12,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:50:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-14 17:50:12,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:12,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:12,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:12,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:12,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:12,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:12,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:12,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:12,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:12,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3451 backedges. 0 proven. 2971 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-14 17:50:12,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862031093] [2020-10-14 17:50:12,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:12,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:50:12,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645250346] [2020-10-14 17:50:12,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:50:12,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:50:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:50:12,348 INFO L87 Difference]: Start difference. First operand 384 states and 502 transitions. Second operand 14 states. [2020-10-14 17:50:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:12,560 INFO L93 Difference]: Finished difference Result 426 states and 555 transitions. [2020-10-14 17:50:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:50:12,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 195 [2020-10-14 17:50:12,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:12,565 INFO L225 Difference]: With dead ends: 426 [2020-10-14 17:50:12,565 INFO L226 Difference]: Without dead ends: 413 [2020-10-14 17:50:12,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:50:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-14 17:50:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 228. [2020-10-14 17:50:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-14 17:50:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 293 transitions. [2020-10-14 17:50:12,585 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 293 transitions. Word has length 195 [2020-10-14 17:50:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:12,586 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 293 transitions. [2020-10-14 17:50:12,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:50:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 293 transitions. [2020-10-14 17:50:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-14 17:50:12,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:12,588 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:12,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:50:12,588 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1234937738, now seen corresponding path program 12 times [2020-10-14 17:50:12,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:12,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239773200] [2020-10-14 17:50:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:12,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:12,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:12,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:12,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:12,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:15,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:17,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:17,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-14 17:50:17,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:50:17,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:50:17,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:17,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:50:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 17:50:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-14 17:50:17,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:17,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:17,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:17,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:17,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:17,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:17,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:17,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:17,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:50:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 3197 proven. 1064 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-10-14 17:50:17,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239773200] [2020-10-14 17:50:17,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:17,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:50:17,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749255763] [2020-10-14 17:50:17,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:50:17,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:50:17,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:50:17,989 INFO L87 Difference]: Start difference. First operand 228 states and 293 transitions. Second operand 22 states. [2020-10-14 17:50:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:20,266 INFO L93 Difference]: Finished difference Result 415 states and 539 transitions. [2020-10-14 17:50:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-14 17:50:20,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 222 [2020-10-14 17:50:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:20,270 INFO L225 Difference]: With dead ends: 415 [2020-10-14 17:50:20,270 INFO L226 Difference]: Without dead ends: 373 [2020-10-14 17:50:20,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2957 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2891, Invalid=7411, Unknown=0, NotChecked=0, Total=10302 [2020-10-14 17:50:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-14 17:50:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 276. [2020-10-14 17:50:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-14 17:50:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 357 transitions. [2020-10-14 17:50:20,292 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 357 transitions. Word has length 222 [2020-10-14 17:50:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:20,293 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 357 transitions. [2020-10-14 17:50:20,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:50:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 357 transitions. [2020-10-14 17:50:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-14 17:50:20,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:20,294 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 36, 16, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:20,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:50:20,295 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash -543016842, now seen corresponding path program 6 times [2020-10-14 17:50:20,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:20,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316858087] [2020-10-14 17:50:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:20,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:20,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:20,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:20,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:23,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:25,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 17:50:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-14 17:50:25,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:25,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:25,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:25,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:25,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:25,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:25,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:25,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:25,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:25,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:50:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 3197 proven. 1064 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-10-14 17:50:25,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316858087] [2020-10-14 17:50:25,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:25,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:50:25,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3404637] [2020-10-14 17:50:25,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:50:25,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:50:25,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:50:25,692 INFO L87 Difference]: Start difference. First operand 276 states and 357 transitions. Second operand 21 states. [2020-10-14 17:50:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:27,032 INFO L93 Difference]: Finished difference Result 346 states and 448 transitions. [2020-10-14 17:50:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 17:50:27,033 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 222 [2020-10-14 17:50:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:27,035 INFO L225 Difference]: With dead ends: 346 [2020-10-14 17:50:27,035 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 17:50:27,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=2859, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 17:50:27,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 17:50:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 234. [2020-10-14 17:50:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-14 17:50:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 301 transitions. [2020-10-14 17:50:27,057 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 301 transitions. Word has length 222 [2020-10-14 17:50:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:27,057 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 301 transitions. [2020-10-14 17:50:27,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:50:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 301 transitions. [2020-10-14 17:50:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-14 17:50:27,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:27,059 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:27,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:50:27,060 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1668707688, now seen corresponding path program 13 times [2020-10-14 17:50:27,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:27,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9418224] [2020-10-14 17:50:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:27,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:27,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:27,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:27,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:27,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:27,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:28,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:28,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:32,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-14 17:50:32,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:32,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:32,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:32,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:32,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:32,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:32,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:32,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:32,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:32,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:32,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:32,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5078 backedges. 17 proven. 4456 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-10-14 17:50:32,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9418224] [2020-10-14 17:50:32,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:32,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:50:32,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136909792] [2020-10-14 17:50:32,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:50:32,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:32,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:50:32,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:50:32,277 INFO L87 Difference]: Start difference. First operand 234 states and 301 transitions. Second operand 15 states. [2020-10-14 17:50:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:32,659 INFO L93 Difference]: Finished difference Result 693 states and 912 transitions. [2020-10-14 17:50:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:50:32,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 228 [2020-10-14 17:50:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:32,662 INFO L225 Difference]: With dead ends: 693 [2020-10-14 17:50:32,662 INFO L226 Difference]: Without dead ends: 486 [2020-10-14 17:50:32,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:50:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-14 17:50:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 455. [2020-10-14 17:50:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-14 17:50:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 596 transitions. [2020-10-14 17:50:32,701 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 596 transitions. Word has length 228 [2020-10-14 17:50:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:32,702 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 596 transitions. [2020-10-14 17:50:32,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:50:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 596 transitions. [2020-10-14 17:50:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-14 17:50:32,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:32,704 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:32,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:50:32,705 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -391223546, now seen corresponding path program 6 times [2020-10-14 17:50:32,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:32,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332391650] [2020-10-14 17:50:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:32,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:33,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:33,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:34,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:35,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:35,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:37,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-10-14 17:50:37,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:37,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:37,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:37,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:37,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:37,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:37,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:37,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:37,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:37,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:37,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5099 backedges. 0 proven. 4456 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2020-10-14 17:50:37,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332391650] [2020-10-14 17:50:37,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:37,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:50:37,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920807198] [2020-10-14 17:50:37,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:50:37,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:50:37,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:50:37,977 INFO L87 Difference]: Start difference. First operand 455 states and 596 transitions. Second operand 15 states. [2020-10-14 17:50:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:38,220 INFO L93 Difference]: Finished difference Result 500 states and 653 transitions. [2020-10-14 17:50:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:50:38,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 230 [2020-10-14 17:50:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:38,223 INFO L225 Difference]: With dead ends: 500 [2020-10-14 17:50:38,223 INFO L226 Difference]: Without dead ends: 487 [2020-10-14 17:50:38,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:50:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-10-14 17:50:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 266. [2020-10-14 17:50:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-14 17:50:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 343 transitions. [2020-10-14 17:50:38,247 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 343 transitions. Word has length 230 [2020-10-14 17:50:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:38,248 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 343 transitions. [2020-10-14 17:50:38,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:50:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 343 transitions. [2020-10-14 17:50:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-14 17:50:38,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:38,250 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:38,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:50:38,250 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1874339741, now seen corresponding path program 14 times [2020-10-14 17:50:38,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:38,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721858830] [2020-10-14 17:50:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:38,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:38,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:39,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:39,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:43,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-14 17:50:43,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:43,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:43,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:43,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:43,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6849 backedges. 4737 proven. 1467 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-14 17:50:43,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721858830] [2020-10-14 17:50:43,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:43,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:50:43,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855628466] [2020-10-14 17:50:43,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:50:43,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:43,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:50:43,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:50:43,628 INFO L87 Difference]: Start difference. First operand 266 states and 343 transitions. Second operand 24 states. [2020-10-14 17:50:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:46,447 INFO L93 Difference]: Finished difference Result 487 states and 634 transitions. [2020-10-14 17:50:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-14 17:50:46,447 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 260 [2020-10-14 17:50:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:46,451 INFO L225 Difference]: With dead ends: 487 [2020-10-14 17:50:46,452 INFO L226 Difference]: Without dead ends: 442 [2020-10-14 17:50:46,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4546 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4175, Invalid=10831, Unknown=0, NotChecked=0, Total=15006 [2020-10-14 17:50:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-14 17:50:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 320. [2020-10-14 17:50:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-14 17:50:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 415 transitions. [2020-10-14 17:50:46,502 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 415 transitions. Word has length 260 [2020-10-14 17:50:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:46,503 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 415 transitions. [2020-10-14 17:50:46,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:50:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 415 transitions. [2020-10-14 17:50:46,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-14 17:50:46,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:46,509 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 45, 18, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:46,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:50:46,509 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash -880782497, now seen corresponding path program 7 times [2020-10-14 17:50:46,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:46,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223121766] [2020-10-14 17:50:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:46,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:46,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:46,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:47,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:51,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:51,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-14 17:50:51,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:50:51,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 17:50:51,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:51,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:50:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:50:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-14 17:50:51,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:51,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:51,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:51,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:51,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:51,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:51,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:51,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:51,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:51,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6849 backedges. 4737 proven. 1467 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-14 17:50:51,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223121766] [2020-10-14 17:50:51,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:51,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:50:51,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4664556] [2020-10-14 17:50:51,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:50:51,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:50:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:50:51,899 INFO L87 Difference]: Start difference. First operand 320 states and 415 transitions. Second operand 23 states. [2020-10-14 17:50:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:53,463 INFO L93 Difference]: Finished difference Result 396 states and 514 transitions. [2020-10-14 17:50:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 17:50:53,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 260 [2020-10-14 17:50:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:53,467 INFO L225 Difference]: With dead ends: 396 [2020-10-14 17:50:53,467 INFO L226 Difference]: Without dead ends: 324 [2020-10-14 17:50:53,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2003, Invalid=4003, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 17:50:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-14 17:50:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 272. [2020-10-14 17:50:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-14 17:50:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 351 transitions. [2020-10-14 17:50:53,493 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 351 transitions. Word has length 260 [2020-10-14 17:50:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:53,494 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 351 transitions. [2020-10-14 17:50:53,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:50:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 351 transitions. [2020-10-14 17:50:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-14 17:50:53,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:53,496 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:53,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:50:53,497 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1040538319, now seen corresponding path program 15 times [2020-10-14 17:50:53,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:53,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400282407] [2020-10-14 17:50:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:54,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:54,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:54,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:54,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:54,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:55,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:56,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:56,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:58,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:58,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:58,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-14 17:50:58,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:50:58,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 17:50:58,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:58,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:58,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:50:58,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:50:58,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 230 [2020-10-14 17:50:58,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:58,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:58,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:58,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:58,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:58,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:58,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:58,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:58,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:58,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:58,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:58,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7252 backedges. 19 proven. 6436 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2020-10-14 17:50:58,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400282407] [2020-10-14 17:50:58,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:58,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:50:58,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008008967] [2020-10-14 17:50:58,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:50:58,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:50:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:50:58,767 INFO L87 Difference]: Start difference. First operand 272 states and 351 transitions. Second operand 16 states. [2020-10-14 17:50:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:59,200 INFO L93 Difference]: Finished difference Result 809 states and 1066 transitions. [2020-10-14 17:50:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:50:59,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 266 [2020-10-14 17:50:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:59,205 INFO L225 Difference]: With dead ends: 809 [2020-10-14 17:50:59,205 INFO L226 Difference]: Without dead ends: 566 [2020-10-14 17:50:59,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:50:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-14 17:50:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 532. [2020-10-14 17:50:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2020-10-14 17:50:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 698 transitions. [2020-10-14 17:50:59,254 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 698 transitions. Word has length 266 [2020-10-14 17:50:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:59,254 INFO L479 AbstractCegarLoop]: Abstraction has 532 states and 698 transitions. [2020-10-14 17:50:59,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:50:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 698 transitions. [2020-10-14 17:50:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-14 17:50:59,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:59,257 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:59,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:50:59,257 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:59,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1445650577, now seen corresponding path program 7 times [2020-10-14 17:50:59,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:59,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825141347] [2020-10-14 17:50:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:59,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:59,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:59,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:59,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:00,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:02,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:04,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:04,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-14 17:51:04,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 17:51:04,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 17:51:04,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:04,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:04,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:51:04,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 17:51:04,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 228 [2020-10-14 17:51:04,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:04,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:04,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:04,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:04,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:04,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:04,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:04,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:04,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:04,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:04,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:04,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7275 backedges. 4621 proven. 1960 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2020-10-14 17:51:04,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825141347] [2020-10-14 17:51:04,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:04,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:51:04,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661620173] [2020-10-14 17:51:04,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:51:04,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:51:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:51:04,685 INFO L87 Difference]: Start difference. First operand 532 states and 698 transitions. Second operand 25 states. [2020-10-14 17:51:06,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:06,804 INFO L93 Difference]: Finished difference Result 589 states and 774 transitions. [2020-10-14 17:51:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-14 17:51:06,804 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 268 [2020-10-14 17:51:06,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:06,807 INFO L225 Difference]: With dead ends: 589 [2020-10-14 17:51:06,807 INFO L226 Difference]: Without dead ends: 541 [2020-10-14 17:51:06,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2731, Invalid=5459, Unknown=0, NotChecked=0, Total=8190 [2020-10-14 17:51:06,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-14 17:51:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2020-10-14 17:51:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-10-14 17:51:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 710 transitions. [2020-10-14 17:51:06,853 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 710 transitions. Word has length 268 [2020-10-14 17:51:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:06,854 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 710 transitions. [2020-10-14 17:51:06,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:51:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 710 transitions. [2020-10-14 17:51:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-14 17:51:06,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:06,857 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:06,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:51:06,857 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash 852152474, now seen corresponding path program 8 times [2020-10-14 17:51:06,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:06,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541653383] [2020-10-14 17:51:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:07,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:07,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:07,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:07,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:07,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:10,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:11,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:11,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-14 17:51:11,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:51:11,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 17:51:11,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:11,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:11,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:51:11,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:11,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 259 [2020-10-14 17:51:11,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:12,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:12,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:12,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:12,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:12,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:12,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:12,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 0 proven. 6611 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-14 17:51:12,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541653383] [2020-10-14 17:51:12,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:12,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:51:12,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805539799] [2020-10-14 17:51:12,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:51:12,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:51:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:51:12,248 INFO L87 Difference]: Start difference. First operand 541 states and 710 transitions. Second operand 16 states. [2020-10-14 17:51:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:12,526 INFO L93 Difference]: Finished difference Result 592 states and 775 transitions. [2020-10-14 17:51:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:51:12,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 271 [2020-10-14 17:51:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:12,529 INFO L225 Difference]: With dead ends: 592 [2020-10-14 17:51:12,530 INFO L226 Difference]: Without dead ends: 579 [2020-10-14 17:51:12,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:51:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-14 17:51:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 313. [2020-10-14 17:51:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-14 17:51:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 405 transitions. [2020-10-14 17:51:12,560 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 405 transitions. Word has length 271 [2020-10-14 17:51:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:12,560 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 405 transitions. [2020-10-14 17:51:12,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:51:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 405 transitions. [2020-10-14 17:51:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-14 17:51:12,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:12,563 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:12,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:51:12,563 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:12,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1870309075, now seen corresponding path program 16 times [2020-10-14 17:51:12,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:12,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109881984] [2020-10-14 17:51:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:12,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:13,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:13,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:13,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:15,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:16,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:17,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:17,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:17,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-14 17:51:17,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:51:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:51:17,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:17,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:51:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 17:51:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-14 17:51:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:17,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:17,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:17,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:17,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:17,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:17,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:17,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:17,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:17,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10056 backedges. 21 proven. 9010 refuted. 0 times theorem prover too weak. 1025 trivial. 0 not checked. [2020-10-14 17:51:17,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109881984] [2020-10-14 17:51:17,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:17,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:51:17,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617185832] [2020-10-14 17:51:17,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:51:17,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:51:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:51:17,841 INFO L87 Difference]: Start difference. First operand 313 states and 405 transitions. Second operand 17 states. [2020-10-14 17:51:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:18,319 INFO L93 Difference]: Finished difference Result 934 states and 1232 transitions. [2020-10-14 17:51:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:51:18,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 307 [2020-10-14 17:51:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:18,322 INFO L225 Difference]: With dead ends: 934 [2020-10-14 17:51:18,323 INFO L226 Difference]: Without dead ends: 652 [2020-10-14 17:51:18,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:51:18,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2020-10-14 17:51:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 615. [2020-10-14 17:51:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-10-14 17:51:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 808 transitions. [2020-10-14 17:51:18,378 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 808 transitions. Word has length 307 [2020-10-14 17:51:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:18,378 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 808 transitions. [2020-10-14 17:51:18,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:51:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 808 transitions. [2020-10-14 17:51:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-14 17:51:18,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:18,381 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:18,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 17:51:18,382 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1944896977, now seen corresponding path program 9 times [2020-10-14 17:51:18,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:18,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277532410] [2020-10-14 17:51:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:18,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:18,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:19,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:19,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:19,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:23,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:23,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-14 17:51:23,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:23,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:51:23,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:23,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:23,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:51:23,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:23,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 297 [2020-10-14 17:51:23,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:23,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:23,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:23,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:23,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:23,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:23,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:23,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:23,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10081 backedges. 0 proven. 9010 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-14 17:51:23,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277532410] [2020-10-14 17:51:23,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:23,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:51:23,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781177617] [2020-10-14 17:51:23,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:51:23,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:51:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:51:23,759 INFO L87 Difference]: Start difference. First operand 615 states and 808 transitions. Second operand 17 states. [2020-10-14 17:51:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:24,029 INFO L93 Difference]: Finished difference Result 666 states and 873 transitions. [2020-10-14 17:51:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:51:24,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 309 [2020-10-14 17:51:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:24,032 INFO L225 Difference]: With dead ends: 666 [2020-10-14 17:51:24,032 INFO L226 Difference]: Without dead ends: 653 [2020-10-14 17:51:24,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:51:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-10-14 17:51:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 351. [2020-10-14 17:51:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-14 17:51:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 455 transitions. [2020-10-14 17:51:24,063 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 455 transitions. Word has length 309 [2020-10-14 17:51:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:24,064 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 455 transitions. [2020-10-14 17:51:24,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:51:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 455 transitions. [2020-10-14 17:51:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-14 17:51:24,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:24,067 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 88, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:24,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 17:51:24,067 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1587743338, now seen corresponding path program 17 times [2020-10-14 17:51:24,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:24,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132168477] [2020-10-14 17:51:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:24,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:24,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking...