/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_copy4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:51:34,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:51:34,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:51:34,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:51:34,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:51:34,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:51:34,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:51:34,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:51:34,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:51:34,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:51:34,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:51:34,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:51:34,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:51:34,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:51:34,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:51:34,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:51:34,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:51:34,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:51:34,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:51:34,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:51:34,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:51:34,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:51:34,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:51:34,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:51:34,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:51:34,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:51:34,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:51:34,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:51:34,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:51:34,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:51:34,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:51:34,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:51:34,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:51:34,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:51:34,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:51:34,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:51:34,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:51:34,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:51:34,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:51:34,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:51:34,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:51:34,631 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 17:51:34,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:51:34,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:51:34,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:51:34,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:51:34,686 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:51:34,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:51:34,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:51:34,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:51:34,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:51:34,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:51:34,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:51:34,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:51:34,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:51:34,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:51:34,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:51:34,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:51:34,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:51:34,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:51:34,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:51:34,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:51:34,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:51:34,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:51:34,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:51:34,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:51:34,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:51:34,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:51:34,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:51:34,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:51:34,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:51:34,692 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 17:51:35,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:51:35,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:51:35,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:51:35,023 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:51:35,023 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:51:35,024 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2020-10-14 17:51:35,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b34d9465/bba4318904484022b623f283942698fd/FLAGba8cbdaa8 [2020-10-14 17:51:35,495 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:51:35,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2020-10-14 17:51:35,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b34d9465/bba4318904484022b623f283942698fd/FLAGba8cbdaa8 [2020-10-14 17:51:35,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b34d9465/bba4318904484022b623f283942698fd [2020-10-14 17:51:35,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:51:35,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:51:35,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:35,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:51:35,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:51:35,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:35" (1/1) ... [2020-10-14 17:51:35,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f931735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:35, skipping insertion in model container [2020-10-14 17:51:35,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:35" (1/1) ... [2020-10-14 17:51:35,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:51:35,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:51:36,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:36,119 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:51:36,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:36,162 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:51:36,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36 WrapperNode [2020-10-14 17:51:36,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:36,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:51:36,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:51:36,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:51:36,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (1/1) ... [2020-10-14 17:51:36,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (1/1) ... [2020-10-14 17:51:36,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (1/1) ... [2020-10-14 17:51:36,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (1/1) ... [2020-10-14 17:51:36,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (1/1) ... [2020-10-14 17:51:36,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (1/1) ... [2020-10-14 17:51:36,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (1/1) ... [2020-10-14 17:51:36,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:51:36,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:51:36,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:51:36,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:51:36,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (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 17:51:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:51:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:51:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:51:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:51:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:51:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:51:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:51:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:51:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:51:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:51:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:51:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:51:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:51:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:51:36,669 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:51:36,669 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 17:51:36,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:36 BoogieIcfgContainer [2020-10-14 17:51:36,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:51:36,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:51:36,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:51:36,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:51:36,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:51:35" (1/3) ... [2020-10-14 17:51:36,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b51812c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:36, skipping insertion in model container [2020-10-14 17:51:36,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:36" (2/3) ... [2020-10-14 17:51:36,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b51812c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:36, skipping insertion in model container [2020-10-14 17:51:36,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:36" (3/3) ... [2020-10-14 17:51:36,682 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2020-10-14 17:51:36,692 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:51:36,699 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:51:36,713 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:51:36,739 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:51:36,740 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:51:36,740 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:51:36,740 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:51:36,740 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:51:36,740 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:51:36,741 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:51:36,741 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:51:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-14 17:51:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:51:36,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:36,777 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 17:51:36,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2020-10-14 17:51:36,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:36,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304787882] [2020-10-14 17:51:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:36,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:36,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:37,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:37,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:37,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:37,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:51:37,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:51:37,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 994 [2020-10-14 17:51:37,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:37,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:51:37,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:51:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:51:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:51:37,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:38,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:38,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:38,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:38,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:38,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:51:38,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:38,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:38,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:38,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:38,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:38,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:51:38,028 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 17:51:38,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304787882] [2020-10-14 17:51:38,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:51:38,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:51:38,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681870385] [2020-10-14 17:51:38,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:51:38,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:38,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:51:38,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:38,068 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-14 17:51:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:38,300 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2020-10-14 17:51:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:51:38,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 17:51:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:38,316 INFO L225 Difference]: With dead ends: 72 [2020-10-14 17:51:38,317 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 17:51:38,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 17:51:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-14 17:51:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 17:51:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 17:51:38,378 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2020-10-14 17:51:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:38,378 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 17:51:38,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:51:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 17:51:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:51:38,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:38,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:38,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:51:38,382 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1377677638, now seen corresponding path program 1 times [2020-10-14 17:51:38,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:38,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073078164] [2020-10-14 17:51:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:38,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:38,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:38,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:38,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:43,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:43,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:51:43,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:43,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:51:43,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:43,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:43,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:51:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:51:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 17:51:43,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:51:44,210 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2020-10-14 17:51:44,377 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 10 [2020-10-14 17:51:44,552 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 17 [2020-10-14 17:51:44,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:44,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:44,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:44,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:44,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:44,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:44,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:44,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:44,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:44,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:44,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073078164] [2020-10-14 17:51:44,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:44,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:51:44,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464258003] [2020-10-14 17:51:44,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:51:44,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:44,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:51:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:51:44,829 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 15 states. [2020-10-14 17:51:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:45,436 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-14 17:51:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:51:45,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-14 17:51:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:45,441 INFO L225 Difference]: With dead ends: 67 [2020-10-14 17:51:45,441 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 17:51:45,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:51:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 17:51:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-10-14 17:51:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:51:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-14 17:51:45,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 29 [2020-10-14 17:51:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:45,460 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-14 17:51:45,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:51:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-14 17:51:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:51:45,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:45,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:45,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:51:45,462 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1068329768, now seen corresponding path program 2 times [2020-10-14 17:51:45,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:45,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336122761] [2020-10-14 17:51:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:45,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:50,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:51:50,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:50,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:51:50,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:50,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:51:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 17:51:50,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:50,804 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-10-14 17:51:50,929 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-14 17:51:51,089 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-14 17:51:51,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:51,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:51,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:51,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:51,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:51,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:51,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:51,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:51,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336122761] [2020-10-14 17:51:51,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:51,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:51:51,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516142948] [2020-10-14 17:51:51,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:51:51,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:51:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:51:51,818 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 17 states. [2020-10-14 17:51:52,473 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-14 17:51:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:52,957 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-14 17:51:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:51:52,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-14 17:51:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:52,963 INFO L225 Difference]: With dead ends: 69 [2020-10-14 17:51:52,963 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 17:51:52,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:51:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 17:51:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2020-10-14 17:51:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 17:51:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-14 17:51:53,006 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2020-10-14 17:51:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:53,007 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-14 17:51:53,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:51:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-14 17:51:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:51:53,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:53,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:53,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:51:53,011 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:53,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1321065201, now seen corresponding path program 1 times [2020-10-14 17:51:53,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:53,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807820273] [2020-10-14 17:51:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:53,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:56,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:51:56,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:51:56,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3757 [2020-10-14 17:51:56,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:56,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:51:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:51:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:51:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:56,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:56,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:56,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:56,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:56,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:56,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:56,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:56,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:56,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:56,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 17:51:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:56,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:56,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:51:56,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:56,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:56,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:56,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:51:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:56,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 17:51:56,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807820273] [2020-10-14 17:51:56,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:56,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:51:56,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486393048] [2020-10-14 17:51:56,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:51:56,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:51:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:51:56,884 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 5 states. [2020-10-14 17:51:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:57,015 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-14 17:51:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:51:57,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-14 17:51:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:57,017 INFO L225 Difference]: With dead ends: 82 [2020-10-14 17:51:57,017 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 17:51:57,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 17:51:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 17:51:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-14 17:51:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 17:51:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-14 17:51:57,034 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2020-10-14 17:51:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:57,035 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-14 17:51:57,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:51:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-14 17:51:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:51:57,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:57,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:57,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:51:57,040 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash -190611479, now seen corresponding path program 2 times [2020-10-14 17:51:57,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:57,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994039502] [2020-10-14 17:51:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:57,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:57,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:57,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:57,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:02,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:52:02,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:02,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:52:02,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:02,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:52:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:02,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:52:02,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:02,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:02,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:02,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:02,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:02,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:52:02,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:02,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:02,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:02,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:02,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:02,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:02,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 17:52:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:02,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:02,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:02,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:02,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:02,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:02,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:02,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:02,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:02,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:02,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 17:52:02,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994039502] [2020-10-14 17:52:02,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:02,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:52:02,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674231863] [2020-10-14 17:52:02,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:52:02,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:52:02,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:02,127 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 6 states. [2020-10-14 17:52:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:02,303 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-14 17:52:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:52:02,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-14 17:52:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:02,306 INFO L225 Difference]: With dead ends: 96 [2020-10-14 17:52:02,306 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 17:52:02,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 17:52:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-14 17:52:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:52:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-14 17:52:02,318 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 45 [2020-10-14 17:52:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:02,318 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-14 17:52:02,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:52:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-14 17:52:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:52:02,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:02,319 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:02,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:52:02,320 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1974602977, now seen corresponding path program 3 times [2020-10-14 17:52:02,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:02,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679944789] [2020-10-14 17:52:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:02,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:07,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 17:52:07,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:07,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 17:52:07,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:07,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:52:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:52:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:52:07,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:52:07,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:07,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:07,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:07,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:07,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:07,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:07,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:07,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:07,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:07,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 17:52:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:07,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:07,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:07,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:07,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:07,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:07,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:07,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:07,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:07,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:07,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-14 17:52:07,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679944789] [2020-10-14 17:52:07,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:07,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:52:07,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012161629] [2020-10-14 17:52:07,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:52:07,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:07,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:52:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:07,407 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 7 states. [2020-10-14 17:52:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:07,614 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-14 17:52:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:52:07,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-14 17:52:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:07,616 INFO L225 Difference]: With dead ends: 110 [2020-10-14 17:52:07,616 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 17:52:07,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 17:52:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-14 17:52:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 17:52:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-14 17:52:07,634 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 53 [2020-10-14 17:52:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:07,634 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-14 17:52:07,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:52:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-14 17:52:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 17:52:07,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:07,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:07,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:52:07,639 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:07,640 INFO L82 PathProgramCache]: Analyzing trace with hash 164725209, now seen corresponding path program 4 times [2020-10-14 17:52:07,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:07,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943987544] [2020-10-14 17:52:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:07,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 17:52:12,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:12,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:52:12,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:52:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 17:52:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:52:12,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:12,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:12,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:12,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:12,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:12,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 17:52:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:12,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:12,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:12,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:12,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-14 17:52:12,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943987544] [2020-10-14 17:52:12,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:12,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:52:12,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083411284] [2020-10-14 17:52:12,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:52:12,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:12,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:52:12,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:12,742 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 8 states. [2020-10-14 17:52:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:12,926 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2020-10-14 17:52:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:52:12,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-14 17:52:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:12,929 INFO L225 Difference]: With dead ends: 124 [2020-10-14 17:52:12,929 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 17:52:12,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 17:52:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-14 17:52:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 17:52:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-14 17:52:12,942 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 61 [2020-10-14 17:52:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:12,942 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-14 17:52:12,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:52:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-14 17:52:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 17:52:12,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:12,944 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:12,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:52:12,944 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash -219554095, now seen corresponding path program 5 times [2020-10-14 17:52:12,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:12,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047926876] [2020-10-14 17:52:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:13,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:17,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:17,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 17:52:17,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:17,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:52:17,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:17,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:17,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:52:17,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:17,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:52:17,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:18,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:18,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:18,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:18,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:18,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:18,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:18,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:18,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:18,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-14 17:52:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:18,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:18,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:18,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:18,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:52:18,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:18,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:18,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:18,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-14 17:52:18,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047926876] [2020-10-14 17:52:18,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:18,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:52:18,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834375285] [2020-10-14 17:52:18,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:52:18,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:18,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:52:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:18,055 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 9 states. [2020-10-14 17:52:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:18,286 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-10-14 17:52:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:52:18,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-14 17:52:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:18,288 INFO L225 Difference]: With dead ends: 138 [2020-10-14 17:52:18,288 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 17:52:18,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 17:52:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-14 17:52:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 17:52:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-14 17:52:18,305 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 69 [2020-10-14 17:52:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:18,305 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-14 17:52:18,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:52:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-14 17:52:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 17:52:18,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:18,307 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:18,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:52:18,307 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2095260617, now seen corresponding path program 6 times [2020-10-14 17:52:18,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:18,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181035828] [2020-10-14 17:52:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:18,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:23,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 17:52:23,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:23,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 17:52:23,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:23,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:52:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 17:52:23,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:52:23,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:23,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:23,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:23,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:23,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:23,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:23,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:23,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:23,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-14 17:52:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:23,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:23,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:23,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:23,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:52:23,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:23,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:23,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:23,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:23,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:23,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 17:52:23,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181035828] [2020-10-14 17:52:23,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:23,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:52:23,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127300946] [2020-10-14 17:52:23,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:52:23,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:52:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:23,439 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 10 states. [2020-10-14 17:52:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:23,688 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2020-10-14 17:52:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:52:23,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-14 17:52:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:23,691 INFO L225 Difference]: With dead ends: 152 [2020-10-14 17:52:23,692 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 17:52:23,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 17:52:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-14 17:52:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 17:52:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-14 17:52:23,707 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 77 [2020-10-14 17:52:23,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:23,707 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-14 17:52:23,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:52:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-14 17:52:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 17:52:23,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:23,709 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:23,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:52:23,710 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:23,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:23,710 INFO L82 PathProgramCache]: Analyzing trace with hash -39497535, now seen corresponding path program 7 times [2020-10-14 17:52:23,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:23,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476490801] [2020-10-14 17:52:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:23,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:28,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:28,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 17:52:28,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:28,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 17:52:28,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:28,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:28,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:52:28,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 17:52:28,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:52:28,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:28,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:28,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:28,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:28,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:28,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:28,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:28,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:28,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:28,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:28,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:28,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:28,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:28,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-14 17:52:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:28,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:28,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:28,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:28,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:28,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:28,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:28,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:28,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:28,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:28,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:28,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-10-14 17:52:28,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476490801] [2020-10-14 17:52:28,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:28,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:52:28,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683774533] [2020-10-14 17:52:28,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:52:28,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:52:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:28,841 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 11 states. [2020-10-14 17:52:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:29,061 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-10-14 17:52:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:52:29,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-14 17:52:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:29,063 INFO L225 Difference]: With dead ends: 166 [2020-10-14 17:52:29,063 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 17:52:29,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 17:52:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-14 17:52:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 17:52:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-10-14 17:52:29,078 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 85 [2020-10-14 17:52:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:29,079 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-10-14 17:52:29,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:52:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-10-14 17:52:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 17:52:29,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:29,080 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:29,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:52:29,081 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:29,081 INFO L82 PathProgramCache]: Analyzing trace with hash -719821383, now seen corresponding path program 8 times [2020-10-14 17:52:29,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:29,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825525886] [2020-10-14 17:52:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:29,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:34,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 17:52:34,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:34,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 17:52:34,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:34,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:52:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 17:52:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:52:34,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:34,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:34,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:34,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:34,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:34,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:34,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:34,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:34,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:34,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:34,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:34,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:34,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-14 17:52:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:34,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:34,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:34,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:34,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:34,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:34,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:34,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:34,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:34,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:34,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-14 17:52:34,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825525886] [2020-10-14 17:52:34,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:34,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:52:34,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67412936] [2020-10-14 17:52:34,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:52:34,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:52:34,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:34,238 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 12 states. [2020-10-14 17:52:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:34,503 INFO L93 Difference]: Finished difference Result 180 states and 192 transitions. [2020-10-14 17:52:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:52:34,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2020-10-14 17:52:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:34,505 INFO L225 Difference]: With dead ends: 180 [2020-10-14 17:52:34,505 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 17:52:34,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 17:52:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-10-14 17:52:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 17:52:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2020-10-14 17:52:34,538 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 93 [2020-10-14 17:52:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:34,538 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2020-10-14 17:52:34,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:52:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2020-10-14 17:52:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 17:52:34,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:34,539 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:34,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:52:34,540 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1831101105, now seen corresponding path program 9 times [2020-10-14 17:52:34,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:34,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345642235] [2020-10-14 17:52:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:34,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:39,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 17:52:39,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:39,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 17:52:39,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:39,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:39,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:52:39,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:39,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:52:39,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:39,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:39,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:39,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:39,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:39,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:39,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:39,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:39,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:39,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:39,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:39,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-14 17:52:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:39,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:39,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:39,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:52:39,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:39,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:39,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-14 17:52:39,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345642235] [2020-10-14 17:52:39,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:39,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:52:39,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708688926] [2020-10-14 17:52:39,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:52:39,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:39,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:52:39,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:39,696 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand 13 states. [2020-10-14 17:52:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:39,937 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2020-10-14 17:52:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:52:39,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-14 17:52:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:39,939 INFO L225 Difference]: With dead ends: 194 [2020-10-14 17:52:39,939 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 17:52:39,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 17:52:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-10-14 17:52:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 17:52:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-14 17:52:39,959 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 101 [2020-10-14 17:52:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:39,959 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-14 17:52:39,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:52:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-14 17:52:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 17:52:39,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:39,963 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:39,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:52:39,964 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:39,964 INFO L82 PathProgramCache]: Analyzing trace with hash 967919529, now seen corresponding path program 10 times [2020-10-14 17:52:39,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:39,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270451829] [2020-10-14 17:52:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:39,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:44,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:44,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:52:44,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:45,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:45,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:45,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:45,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:45,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:45,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:45,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:45,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-14 17:52:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:45,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:45,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:52:45,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:45,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:45,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-10-14 17:52:45,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270451829] [2020-10-14 17:52:45,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:45,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:52:45,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956044167] [2020-10-14 17:52:45,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:52:45,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:45,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:52:45,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:45,140 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 14 states. [2020-10-14 17:52:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:45,448 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2020-10-14 17:52:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:52:45,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 109 [2020-10-14 17:52:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:45,450 INFO L225 Difference]: With dead ends: 208 [2020-10-14 17:52:45,451 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 17:52:45,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 17:52:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-10-14 17:52:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 17:52:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-14 17:52:45,475 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 109 [2020-10-14 17:52:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:45,476 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-14 17:52:45,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:52:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-14 17:52:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 17:52:45,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:45,482 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:45,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:52:45,483 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:45,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1197009759, now seen corresponding path program 11 times [2020-10-14 17:52:45,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:45,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409815495] [2020-10-14 17:52:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:45,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:50,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:50,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-14 17:52:50,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:50,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 17:52:50,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:50,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:50,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:52:50,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 17:52:50,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:52:50,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:50,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:50,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:50,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:50,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:50,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:50,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:50,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:50,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:50,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:50,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:50,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:50,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-14 17:52:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:50,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:50,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:50,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:50,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:50,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:52:50,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:50,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:50,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:50,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2020-10-14 17:52:50,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409815495] [2020-10-14 17:52:50,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:50,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:52:50,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728322903] [2020-10-14 17:52:50,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:52:50,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:52:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:52:50,671 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 15 states. [2020-10-14 17:52:50,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:50,984 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2020-10-14 17:52:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:52:50,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-10-14 17:52:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:50,986 INFO L225 Difference]: With dead ends: 222 [2020-10-14 17:52:50,986 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 17:52:50,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:52:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 17:52:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2020-10-14 17:52:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 17:52:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2020-10-14 17:52:51,000 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 117 [2020-10-14 17:52:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:51,000 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2020-10-14 17:52:51,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:52:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2020-10-14 17:52:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 17:52:51,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:51,002 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:51,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:52:51,002 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:51,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1911409049, now seen corresponding path program 12 times [2020-10-14 17:52:51,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:51,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89066546] [2020-10-14 17:52:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:56,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-14 17:52:56,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:56,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 17:52:56,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:56,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:52:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:52:56,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:56,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:56,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:56,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:56,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:56,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:56,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:56,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:56,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:56,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-14 17:52:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:56,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:56,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:56,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:56,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:56,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:56,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:56,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:56,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:56,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-10-14 17:52:56,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89066546] [2020-10-14 17:52:56,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:56,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:52:56,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434063637] [2020-10-14 17:52:56,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:52:56,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:56,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:52:56,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:52:56,211 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand 16 states. [2020-10-14 17:52:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:56,536 INFO L93 Difference]: Finished difference Result 236 states and 248 transitions. [2020-10-14 17:52:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:52:56,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2020-10-14 17:52:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:56,537 INFO L225 Difference]: With dead ends: 236 [2020-10-14 17:52:56,537 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 17:52:56,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:52:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 17:52:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2020-10-14 17:52:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 17:52:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2020-10-14 17:52:56,557 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 125 [2020-10-14 17:52:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:56,558 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2020-10-14 17:52:56,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:52:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2020-10-14 17:52:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-14 17:52:56,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:56,559 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:56,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:52:56,559 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:56,560 INFO L82 PathProgramCache]: Analyzing trace with hash -143825263, now seen corresponding path program 13 times [2020-10-14 17:52:56,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:56,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464090739] [2020-10-14 17:52:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:56,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:01,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 17:53:01,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:01,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 17:53:01,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:01,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:01,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:53:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 17:53:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:53:01,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:01,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:01,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:01,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:01,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:01,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:01,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:01,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:01,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:01,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-14 17:53:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:01,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:01,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:01,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:01,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:01,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:01,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:01,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:01,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:01,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:01,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2020-10-14 17:53:01,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464090739] [2020-10-14 17:53:01,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:01,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:53:01,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563936070] [2020-10-14 17:53:01,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:53:01,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:53:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:01,808 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 17 states. [2020-10-14 17:53:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:02,155 INFO L93 Difference]: Finished difference Result 250 states and 262 transitions. [2020-10-14 17:53:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:53:02,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-10-14 17:53:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:02,157 INFO L225 Difference]: With dead ends: 250 [2020-10-14 17:53:02,158 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 17:53:02,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 17:53:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-14 17:53:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 17:53:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2020-10-14 17:53:02,177 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 133 [2020-10-14 17:53:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:02,178 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2020-10-14 17:53:02,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:53:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2020-10-14 17:53:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-14 17:53:02,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:02,179 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:02,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:53:02,180 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -452072567, now seen corresponding path program 14 times [2020-10-14 17:53:02,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:02,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382103584] [2020-10-14 17:53:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:02,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:02,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:07,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-14 17:53:07,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:07,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5140 [2020-10-14 17:53:07,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:07,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:07,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:53:07,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 17:53:07,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:53:07,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:07,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:07,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:07,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:07,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:07,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:07,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:07,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:07,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-14 17:53:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:07,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-14 17:53:07,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382103584] [2020-10-14 17:53:07,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:07,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:53:07,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314330740] [2020-10-14 17:53:07,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:53:07,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:07,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:53:07,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:07,551 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand 18 states. [2020-10-14 17:53:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:07,910 INFO L93 Difference]: Finished difference Result 264 states and 276 transitions. [2020-10-14 17:53:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:53:07,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-10-14 17:53:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:07,911 INFO L225 Difference]: With dead ends: 264 [2020-10-14 17:53:07,912 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 17:53:07,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 17:53:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2020-10-14 17:53:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 17:53:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2020-10-14 17:53:07,926 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 141 [2020-10-14 17:53:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:07,926 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2020-10-14 17:53:07,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:53:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2020-10-14 17:53:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-14 17:53:07,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:07,928 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:07,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:53:07,929 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash -524855167, now seen corresponding path program 15 times [2020-10-14 17:53:07,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:07,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585148133] [2020-10-14 17:53:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:07,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:13,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-14 17:53:13,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-14 17:53:13,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:13,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:53:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 17:53:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:53:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:13,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:13,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:13,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:13,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:13,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:13,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:13,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:13,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:13,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:13,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:13,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:13,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-14 17:53:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:13,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:13,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:13,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:13,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:13,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:13,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:13,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-10-14 17:53:13,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585148133] [2020-10-14 17:53:13,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:13,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:53:13,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768171619] [2020-10-14 17:53:13,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:53:13,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:13,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:53:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:13,303 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand 19 states. [2020-10-14 17:53:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:13,723 INFO L93 Difference]: Finished difference Result 278 states and 290 transitions. [2020-10-14 17:53:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:53:13,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 149 [2020-10-14 17:53:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:13,725 INFO L225 Difference]: With dead ends: 278 [2020-10-14 17:53:13,725 INFO L226 Difference]: Without dead ends: 165 [2020-10-14 17:53:13,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-14 17:53:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2020-10-14 17:53:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 17:53:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 166 transitions. [2020-10-14 17:53:13,742 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 166 transitions. Word has length 149 [2020-10-14 17:53:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:13,742 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 166 transitions. [2020-10-14 17:53:13,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:53:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 166 transitions. [2020-10-14 17:53:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-14 17:53:13,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:13,745 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:13,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:53:13,746 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1705923207, now seen corresponding path program 16 times [2020-10-14 17:53:13,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:13,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750583272] [2020-10-14 17:53:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:13,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:18,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:18,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-14 17:53:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5195 [2020-10-14 17:53:18,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:18,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:53:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 17:53:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:53:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:19,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:19,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:19,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:19,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:19,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:19,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:19,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:19,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-10-14 17:53:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:19,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:19,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:19,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:19,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:19,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:19,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:19,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-14 17:53:19,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750583272] [2020-10-14 17:53:19,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:19,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:53:19,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440058129] [2020-10-14 17:53:19,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:53:19,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:19,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:53:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:19,228 INFO L87 Difference]: Start difference. First operand 161 states and 166 transitions. Second operand 20 states. [2020-10-14 17:53:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:19,678 INFO L93 Difference]: Finished difference Result 292 states and 304 transitions. [2020-10-14 17:53:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:53:19,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 157 [2020-10-14 17:53:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:19,680 INFO L225 Difference]: With dead ends: 292 [2020-10-14 17:53:19,680 INFO L226 Difference]: Without dead ends: 173 [2020-10-14 17:53:19,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-14 17:53:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2020-10-14 17:53:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 17:53:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 174 transitions. [2020-10-14 17:53:19,695 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 174 transitions. Word has length 157 [2020-10-14 17:53:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:19,695 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 174 transitions. [2020-10-14 17:53:19,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:53:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 174 transitions. [2020-10-14 17:53:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 17:53:19,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:19,698 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:19,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:53:19,698 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash -876287375, now seen corresponding path program 17 times [2020-10-14 17:53:19,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:19,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634504502] [2020-10-14 17:53:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:19,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:24,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:24,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-14 17:53:24,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:24,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:53:24,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:24,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:53:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 17:53:24,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:53:24,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:24,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:24,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:24,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:24,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:24,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:24,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:53:24,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:24,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:24,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:24,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-14 17:53:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:24,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:24,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:24,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:24,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:24,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:24,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:24,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:24,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2020-10-14 17:53:25,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634504502] [2020-10-14 17:53:25,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:25,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:53:25,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404322983] [2020-10-14 17:53:25,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:53:25,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:25,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:53:25,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:25,003 INFO L87 Difference]: Start difference. First operand 169 states and 174 transitions. Second operand 21 states. [2020-10-14 17:53:25,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:25,483 INFO L93 Difference]: Finished difference Result 306 states and 318 transitions. [2020-10-14 17:53:25,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:53:25,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 165 [2020-10-14 17:53:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:25,485 INFO L225 Difference]: With dead ends: 306 [2020-10-14 17:53:25,486 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 17:53:25,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 17:53:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2020-10-14 17:53:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 17:53:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 182 transitions. [2020-10-14 17:53:25,504 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 182 transitions. Word has length 165 [2020-10-14 17:53:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:25,504 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 182 transitions. [2020-10-14 17:53:25,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:53:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 182 transitions. [2020-10-14 17:53:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-14 17:53:25,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:25,510 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:25,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:53:25,511 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:25,511 INFO L82 PathProgramCache]: Analyzing trace with hash 955846505, now seen corresponding path program 18 times [2020-10-14 17:53:25,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:25,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009390419] [2020-10-14 17:53:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:25,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:30,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:30,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-14 17:53:30,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:30,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5373 [2020-10-14 17:53:30,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:30,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:53:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 17:53:30,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:53:30,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:31,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:31,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:31,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:31,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:31,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:31,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:31,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:31,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:31,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-14 17:53:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:31,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:31,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:31,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:31,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:31,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:31,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:31,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:31,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:31,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:31,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:31,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2020-10-14 17:53:31,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009390419] [2020-10-14 17:53:31,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:31,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:53:31,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229912127] [2020-10-14 17:53:31,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:53:31,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:31,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:53:31,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:31,208 INFO L87 Difference]: Start difference. First operand 177 states and 182 transitions. Second operand 22 states. [2020-10-14 17:53:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:31,633 INFO L93 Difference]: Finished difference Result 320 states and 332 transitions. [2020-10-14 17:53:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:53:31,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 173 [2020-10-14 17:53:31,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:31,636 INFO L225 Difference]: With dead ends: 320 [2020-10-14 17:53:31,636 INFO L226 Difference]: Without dead ends: 189 [2020-10-14 17:53:31,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-14 17:53:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2020-10-14 17:53:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-14 17:53:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2020-10-14 17:53:31,653 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 173 [2020-10-14 17:53:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:31,653 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2020-10-14 17:53:31,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:53:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2020-10-14 17:53:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-14 17:53:31,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:31,655 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:31,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:53:31,656 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1344922527, now seen corresponding path program 19 times [2020-10-14 17:53:31,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:31,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497614371] [2020-10-14 17:53:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:31,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:31,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:31,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:36,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:36,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-14 17:53:36,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-14 17:53:36,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:36,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:53:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 17:53:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:53:36,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:37,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:37,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:37,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:37,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:37,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:37,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:37,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:37,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:37,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:37,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:37,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-10-14 17:53:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:37,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:37,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:37,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:37,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:37,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:37,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:37,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:37,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2020-10-14 17:53:37,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497614371] [2020-10-14 17:53:37,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:37,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:53:37,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276325573] [2020-10-14 17:53:37,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:53:37,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:37,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:53:37,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:37,091 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand 23 states. [2020-10-14 17:53:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:37,598 INFO L93 Difference]: Finished difference Result 334 states and 346 transitions. [2020-10-14 17:53:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:53:37,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 181 [2020-10-14 17:53:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:37,602 INFO L225 Difference]: With dead ends: 334 [2020-10-14 17:53:37,603 INFO L226 Difference]: Without dead ends: 197 [2020-10-14 17:53:37,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-14 17:53:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2020-10-14 17:53:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 17:53:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 198 transitions. [2020-10-14 17:53:37,625 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 198 transitions. Word has length 181 [2020-10-14 17:53:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:37,626 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 198 transitions. [2020-10-14 17:53:37,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:53:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 198 transitions. [2020-10-14 17:53:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-14 17:53:37,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:37,628 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:37,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:53:37,628 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash 138678617, now seen corresponding path program 20 times [2020-10-14 17:53:37,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:37,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526010375] [2020-10-14 17:53:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:37,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:37,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:37,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:42,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:42,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-14 17:53:42,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:42,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 17:53:42,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:42,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:53:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-14 17:53:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:53:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:43,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:43,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:43,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:43,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:43,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:43,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:43,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:43,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:43,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:43,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:43,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-10-14 17:53:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:43,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:43,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:43,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:43,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:53:43,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:43,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:43,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:43,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2020-10-14 17:53:43,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526010375] [2020-10-14 17:53:43,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:43,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:53:43,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126617312] [2020-10-14 17:53:43,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:53:43,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:53:43,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:43,052 INFO L87 Difference]: Start difference. First operand 193 states and 198 transitions. Second operand 24 states. [2020-10-14 17:53:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:43,626 INFO L93 Difference]: Finished difference Result 348 states and 360 transitions. [2020-10-14 17:53:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:53:43,626 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2020-10-14 17:53:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:43,628 INFO L225 Difference]: With dead ends: 348 [2020-10-14 17:53:43,628 INFO L226 Difference]: Without dead ends: 205 [2020-10-14 17:53:43,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-14 17:53:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2020-10-14 17:53:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-14 17:53:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 206 transitions. [2020-10-14 17:53:43,645 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 206 transitions. Word has length 189 [2020-10-14 17:53:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:43,645 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 206 transitions. [2020-10-14 17:53:43,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:53:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 206 transitions. [2020-10-14 17:53:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-14 17:53:43,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:43,647 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:43,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:53:43,647 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:43,647 INFO L82 PathProgramCache]: Analyzing trace with hash 606793297, now seen corresponding path program 21 times [2020-10-14 17:53:43,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:43,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380727618] [2020-10-14 17:53:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:43,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:48,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5243 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:53:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:49,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:49,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:49,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:49,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:49,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:49,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:53:49,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:49,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:49,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-14 17:53:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:49,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:49,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:49,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:49,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:49,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:49,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:49,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:49,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 1325 trivial. 0 not checked. [2020-10-14 17:53:49,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380727618] [2020-10-14 17:53:49,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:49,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:53:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355135508] [2020-10-14 17:53:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:53:49,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:53:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:49,436 INFO L87 Difference]: Start difference. First operand 201 states and 206 transitions. Second operand 25 states. [2020-10-14 17:53:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:50,129 INFO L93 Difference]: Finished difference Result 362 states and 374 transitions. [2020-10-14 17:53:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:53:50,130 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 197 [2020-10-14 17:53:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:50,132 INFO L225 Difference]: With dead ends: 362 [2020-10-14 17:53:50,132 INFO L226 Difference]: Without dead ends: 213 [2020-10-14 17:53:50,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-14 17:53:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2020-10-14 17:53:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-14 17:53:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 214 transitions. [2020-10-14 17:53:50,162 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 214 transitions. Word has length 197 [2020-10-14 17:53:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:50,162 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 214 transitions. [2020-10-14 17:53:50,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:53:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 214 transitions. [2020-10-14 17:53:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-14 17:53:50,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:50,165 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:50,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:53:50,170 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:50,171 INFO L82 PathProgramCache]: Analyzing trace with hash -277695671, now seen corresponding path program 22 times [2020-10-14 17:53:50,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:50,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290637191] [2020-10-14 17:53:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:55,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:55,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-14 17:53:55,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5336 [2020-10-14 17:53:55,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:55,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:53:55,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-14 17:53:55,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:53:55,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:56,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:56,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:56,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:56,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:56,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:53:56,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:56,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:56,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:56,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:56,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-14 17:53:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:56,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:56,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:53:56,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:56,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:56,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:56,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:53:56,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:56,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2020-10-14 17:53:56,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290637191] [2020-10-14 17:53:56,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:56,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:53:56,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745386039] [2020-10-14 17:53:56,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:53:56,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:53:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:53:56,128 INFO L87 Difference]: Start difference. First operand 209 states and 214 transitions. Second operand 26 states. [2020-10-14 17:53:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:56,857 INFO L93 Difference]: Finished difference Result 376 states and 388 transitions. [2020-10-14 17:53:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:53:56,857 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 205 [2020-10-14 17:53:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:56,859 INFO L225 Difference]: With dead ends: 376 [2020-10-14 17:53:56,859 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 17:53:56,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:53:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 17:53:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2020-10-14 17:53:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-14 17:53:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 222 transitions. [2020-10-14 17:53:56,878 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 222 transitions. Word has length 205 [2020-10-14 17:53:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:56,878 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 222 transitions. [2020-10-14 17:53:56,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:53:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 222 transitions. [2020-10-14 17:53:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-14 17:53:56,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:56,880 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:56,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:53:56,881 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1610833985, now seen corresponding path program 23 times [2020-10-14 17:53:56,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:56,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513384143] [2020-10-14 17:53:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:01,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:54:01,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:02,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:02,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:02,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:02,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:02,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:02,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:02,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:02,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:02,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:02,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:02,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:02,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:02,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-10-14 17:54:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:02,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:02,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:02,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:02,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:02,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:02,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:02,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:02,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2020-10-14 17:54:02,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513384143] [2020-10-14 17:54:02,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:02,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:54:02,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082453806] [2020-10-14 17:54:02,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:54:02,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:54:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:02,523 INFO L87 Difference]: Start difference. First operand 217 states and 222 transitions. Second operand 27 states. [2020-10-14 17:54:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:03,204 INFO L93 Difference]: Finished difference Result 390 states and 402 transitions. [2020-10-14 17:54:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:54:03,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 213 [2020-10-14 17:54:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:03,206 INFO L225 Difference]: With dead ends: 390 [2020-10-14 17:54:03,207 INFO L226 Difference]: Without dead ends: 229 [2020-10-14 17:54:03,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-14 17:54:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2020-10-14 17:54:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-14 17:54:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 230 transitions. [2020-10-14 17:54:03,232 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 230 transitions. Word has length 213 [2020-10-14 17:54:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:03,233 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 230 transitions. [2020-10-14 17:54:03,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:54:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 230 transitions. [2020-10-14 17:54:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-14 17:54:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:03,243 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:03,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:54:03,246 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1975842105, now seen corresponding path program 24 times [2020-10-14 17:54:03,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:03,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301536129] [2020-10-14 17:54:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:03,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:08,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:08,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-14 17:54:08,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:08,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5367 [2020-10-14 17:54:08,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:08,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:08,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:54:08,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-14 17:54:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:54:08,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:09,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:09,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:09,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:09,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:09,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:09,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:09,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:09,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:09,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:09,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:54:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-10-14 17:54:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:09,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:09,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:09,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:09,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:09,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:09,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 1730 trivial. 0 not checked. [2020-10-14 17:54:09,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301536129] [2020-10-14 17:54:09,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:09,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:54:09,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778812706] [2020-10-14 17:54:09,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:54:09,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:09,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:54:09,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:09,144 INFO L87 Difference]: Start difference. First operand 225 states and 230 transitions. Second operand 28 states. [2020-10-14 17:54:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:09,796 INFO L93 Difference]: Finished difference Result 404 states and 416 transitions. [2020-10-14 17:54:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:54:09,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 221 [2020-10-14 17:54:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:09,798 INFO L225 Difference]: With dead ends: 404 [2020-10-14 17:54:09,798 INFO L226 Difference]: Without dead ends: 237 [2020-10-14 17:54:09,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-14 17:54:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2020-10-14 17:54:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-14 17:54:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 238 transitions. [2020-10-14 17:54:09,819 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 238 transitions. Word has length 221 [2020-10-14 17:54:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:09,819 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 238 transitions. [2020-10-14 17:54:09,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:54:09,819 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 238 transitions. [2020-10-14 17:54:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-14 17:54:09,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:09,821 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:09,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:54:09,822 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 983527985, now seen corresponding path program 25 times [2020-10-14 17:54:09,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:09,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242162378] [2020-10-14 17:54:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:09,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:10,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:15,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:15,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-14 17:54:15,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:15,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5195 [2020-10-14 17:54:15,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:15,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:15,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:54:15,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-14 17:54:15,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:54:15,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:15,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:15,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:15,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:15,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:15,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:15,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:15,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:15,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-10-14 17:54:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:15,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:15,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:15,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:15,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:15,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:15,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:15,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 1877 trivial. 0 not checked. [2020-10-14 17:54:15,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242162378] [2020-10-14 17:54:15,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:15,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:54:15,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002313197] [2020-10-14 17:54:15,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:54:15,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:54:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:15,591 INFO L87 Difference]: Start difference. First operand 233 states and 238 transitions. Second operand 29 states. [2020-10-14 17:54:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:16,381 INFO L93 Difference]: Finished difference Result 418 states and 430 transitions. [2020-10-14 17:54:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:54:16,382 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 229 [2020-10-14 17:54:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:16,383 INFO L225 Difference]: With dead ends: 418 [2020-10-14 17:54:16,383 INFO L226 Difference]: Without dead ends: 245 [2020-10-14 17:54:16,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-14 17:54:16,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2020-10-14 17:54:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-14 17:54:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 246 transitions. [2020-10-14 17:54:16,405 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 246 transitions. Word has length 229 [2020-10-14 17:54:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:16,405 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 246 transitions. [2020-10-14 17:54:16,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:54:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 246 transitions. [2020-10-14 17:54:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-14 17:54:16,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:16,407 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:16,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:54:16,408 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:16,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1032136919, now seen corresponding path program 26 times [2020-10-14 17:54:16,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:16,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830250695] [2020-10-14 17:54:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:21,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5372 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:54:21,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:22,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:22,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:22,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:22,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:22,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:22,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:22,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:22,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:22,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:22,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:22,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:22,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-10-14 17:54:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:22,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:22,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:22,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:22,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:22,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2708 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-14 17:54:22,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830250695] [2020-10-14 17:54:22,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:22,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:54:22,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544460038] [2020-10-14 17:54:22,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:54:22,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:22,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:54:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:22,355 INFO L87 Difference]: Start difference. First operand 241 states and 246 transitions. Second operand 30 states. [2020-10-14 17:54:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:23,111 INFO L93 Difference]: Finished difference Result 432 states and 444 transitions. [2020-10-14 17:54:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:54:23,112 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 237 [2020-10-14 17:54:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:23,114 INFO L225 Difference]: With dead ends: 432 [2020-10-14 17:54:23,114 INFO L226 Difference]: Without dead ends: 253 [2020-10-14 17:54:23,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-14 17:54:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2020-10-14 17:54:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-14 17:54:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 254 transitions. [2020-10-14 17:54:23,142 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 254 transitions. Word has length 237 [2020-10-14 17:54:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:23,142 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 254 transitions. [2020-10-14 17:54:23,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:54:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 254 transitions. [2020-10-14 17:54:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-14 17:54:23,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:23,145 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:23,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:54:23,145 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash 725558305, now seen corresponding path program 27 times [2020-10-14 17:54:23,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:23,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161131798] [2020-10-14 17:54:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:23,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:28,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:28,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-14 17:54:28,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:28,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-14 17:54:28,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:28,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:28,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:54:28,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:28,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:54:28,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:28,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:28,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:28,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:28,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:28,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:28,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:28,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:28,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:28,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-10-14 17:54:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:28,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:28,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:28,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:28,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2920 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 2189 trivial. 0 not checked. [2020-10-14 17:54:29,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161131798] [2020-10-14 17:54:29,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:29,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:54:29,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921287419] [2020-10-14 17:54:29,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:54:29,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:29,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:54:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:29,011 INFO L87 Difference]: Start difference. First operand 249 states and 254 transitions. Second operand 31 states. [2020-10-14 17:54:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:29,748 INFO L93 Difference]: Finished difference Result 446 states and 458 transitions. [2020-10-14 17:54:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:54:29,749 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 245 [2020-10-14 17:54:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:29,751 INFO L225 Difference]: With dead ends: 446 [2020-10-14 17:54:29,751 INFO L226 Difference]: Without dead ends: 261 [2020-10-14 17:54:29,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-14 17:54:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2020-10-14 17:54:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-14 17:54:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 262 transitions. [2020-10-14 17:54:29,773 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 262 transitions. Word has length 245 [2020-10-14 17:54:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:29,774 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 262 transitions. [2020-10-14 17:54:29,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:54:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 262 transitions. [2020-10-14 17:54:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-14 17:54:29,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:29,776 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:29,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:54:29,776 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1663805159, now seen corresponding path program 28 times [2020-10-14 17:54:29,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:29,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558925015] [2020-10-14 17:54:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:29,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:34,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:34,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-14 17:54:34,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:34,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-14 17:54:34,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:34,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:54:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:34,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:54:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:35,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:35,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:35,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-10-14 17:54:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:35,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:35,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:35,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:35,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:35,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:35,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3140 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2020-10-14 17:54:35,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558925015] [2020-10-14 17:54:35,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:35,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:54:35,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548075678] [2020-10-14 17:54:35,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:54:35,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:54:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:35,565 INFO L87 Difference]: Start difference. First operand 257 states and 262 transitions. Second operand 32 states. [2020-10-14 17:54:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:36,271 INFO L93 Difference]: Finished difference Result 460 states and 472 transitions. [2020-10-14 17:54:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:54:36,272 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 253 [2020-10-14 17:54:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:36,274 INFO L225 Difference]: With dead ends: 460 [2020-10-14 17:54:36,274 INFO L226 Difference]: Without dead ends: 269 [2020-10-14 17:54:36,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-14 17:54:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2020-10-14 17:54:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-14 17:54:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 270 transitions. [2020-10-14 17:54:36,297 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 270 transitions. Word has length 253 [2020-10-14 17:54:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:36,297 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 270 transitions. [2020-10-14 17:54:36,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:54:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 270 transitions. [2020-10-14 17:54:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-14 17:54:36,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:36,299 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:36,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:54:36,300 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:36,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1226995217, now seen corresponding path program 29 times [2020-10-14 17:54:36,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:36,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710622958] [2020-10-14 17:54:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:41,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:41,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-14 17:54:41,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:41,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5288 [2020-10-14 17:54:41,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:41,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:54:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-14 17:54:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:54:41,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:42,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:42,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:42,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:42,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:42,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:42,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:42,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:42,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:42,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:42,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:42,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-10-14 17:54:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:42,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 2525 trivial. 0 not checked. [2020-10-14 17:54:42,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710622958] [2020-10-14 17:54:42,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:42,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:54:42,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171551708] [2020-10-14 17:54:42,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:54:42,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:42,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:54:42,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:42,281 INFO L87 Difference]: Start difference. First operand 265 states and 270 transitions. Second operand 33 states. [2020-10-14 17:54:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:43,060 INFO L93 Difference]: Finished difference Result 474 states and 486 transitions. [2020-10-14 17:54:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:54:43,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 261 [2020-10-14 17:54:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:43,064 INFO L225 Difference]: With dead ends: 474 [2020-10-14 17:54:43,064 INFO L226 Difference]: Without dead ends: 277 [2020-10-14 17:54:43,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-14 17:54:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2020-10-14 17:54:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-14 17:54:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 278 transitions. [2020-10-14 17:54:43,090 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 278 transitions. Word has length 261 [2020-10-14 17:54:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:43,091 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 278 transitions. [2020-10-14 17:54:43,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:54:43,091 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 278 transitions. [2020-10-14 17:54:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-14 17:54:43,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:43,093 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:43,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:54:43,093 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1813084937, now seen corresponding path program 30 times [2020-10-14 17:54:43,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:43,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245591687] [2020-10-14 17:54:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:43,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:43,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:43,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:48,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5223 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:54:48,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:49,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:49,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:49,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:49,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:49,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:49,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:49,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:49,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:49,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-10-14 17:54:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:49,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:49,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:49,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:49,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:49,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:49,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:49,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 2702 trivial. 0 not checked. [2020-10-14 17:54:49,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245591687] [2020-10-14 17:54:49,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:49,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:54:49,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726469822] [2020-10-14 17:54:49,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:54:49,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:49,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:54:49,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:49,062 INFO L87 Difference]: Start difference. First operand 273 states and 278 transitions. Second operand 34 states. [2020-10-14 17:54:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:49,897 INFO L93 Difference]: Finished difference Result 488 states and 500 transitions. [2020-10-14 17:54:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:54:49,898 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 269 [2020-10-14 17:54:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:49,900 INFO L225 Difference]: With dead ends: 488 [2020-10-14 17:54:49,900 INFO L226 Difference]: Without dead ends: 285 [2020-10-14 17:54:49,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-14 17:54:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2020-10-14 17:54:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-14 17:54:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 286 transitions. [2020-10-14 17:54:49,923 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 286 transitions. Word has length 269 [2020-10-14 17:54:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:49,923 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 286 transitions. [2020-10-14 17:54:49,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:54:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 286 transitions. [2020-10-14 17:54:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-14 17:54:49,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:49,925 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:49,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:54:49,926 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1267296257, now seen corresponding path program 31 times [2020-10-14 17:54:49,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:49,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964141198] [2020-10-14 17:54:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:49,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:55,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:55,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-14 17:54:55,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:55,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5356 [2020-10-14 17:54:55,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:55,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:55,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:54:55,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-14 17:54:55,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:54:55,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:56,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:56,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:56,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:56,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:56,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:56,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-10-14 17:54:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:56,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:56,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:54:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:54:56,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:56,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:54:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2885 trivial. 0 not checked. [2020-10-14 17:54:56,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964141198] [2020-10-14 17:54:56,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:56,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:54:56,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525227703] [2020-10-14 17:54:56,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:54:56,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:54:56,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:54:56,051 INFO L87 Difference]: Start difference. First operand 281 states and 286 transitions. Second operand 35 states. [2020-10-14 17:54:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:56,889 INFO L93 Difference]: Finished difference Result 502 states and 514 transitions. [2020-10-14 17:54:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:54:56,890 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 277 [2020-10-14 17:54:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:56,892 INFO L225 Difference]: With dead ends: 502 [2020-10-14 17:54:56,892 INFO L226 Difference]: Without dead ends: 293 [2020-10-14 17:54:56,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:54:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-14 17:54:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2020-10-14 17:54:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 17:54:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 294 transitions. [2020-10-14 17:54:56,916 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 294 transitions. Word has length 277 [2020-10-14 17:54:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:56,916 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 294 transitions. [2020-10-14 17:54:56,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:54:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 294 transitions. [2020-10-14 17:54:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-14 17:54:56,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:56,918 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:56,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:54:56,919 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash 930233593, now seen corresponding path program 32 times [2020-10-14 17:54:56,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:56,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806389932] [2020-10-14 17:54:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:56,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:57,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:57,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:02,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:02,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-14 17:55:02,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:02,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-14 17:55:02,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:02,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:02,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:55:02,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:02,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:55:02,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:02,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:02,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:02,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:02,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:02,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:02,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:02,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:02,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:02,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2020-10-14 17:55:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:02,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:02,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:02,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:55:02,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:02,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:55:02,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:02,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:02,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:02,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:55:02,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:02,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 3074 trivial. 0 not checked. [2020-10-14 17:55:02,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806389932] [2020-10-14 17:55:02,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:02,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:55:02,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291979653] [2020-10-14 17:55:02,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:55:02,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:02,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:55:02,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:02,838 INFO L87 Difference]: Start difference. First operand 289 states and 294 transitions. Second operand 36 states. [2020-10-14 17:55:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:03,720 INFO L93 Difference]: Finished difference Result 516 states and 528 transitions. [2020-10-14 17:55:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:55:03,720 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 285 [2020-10-14 17:55:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:03,723 INFO L225 Difference]: With dead ends: 516 [2020-10-14 17:55:03,723 INFO L226 Difference]: Without dead ends: 301 [2020-10-14 17:55:03,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-14 17:55:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2020-10-14 17:55:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-14 17:55:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 302 transitions. [2020-10-14 17:55:03,746 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 302 transitions. Word has length 285 [2020-10-14 17:55:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:03,746 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 302 transitions. [2020-10-14 17:55:03,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:55:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 302 transitions. [2020-10-14 17:55:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-14 17:55:03,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:03,749 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:03,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:55:03,749 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1984693775, now seen corresponding path program 33 times [2020-10-14 17:55:03,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:03,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171947941] [2020-10-14 17:55:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:03,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:09,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:09,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-14 17:55:09,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:09,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5378 [2020-10-14 17:55:09,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:09,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:55:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:55:09,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:09,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:09,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:09,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:09,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:09,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:09,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:09,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:09,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:09,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:09,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 281 [2020-10-14 17:55:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:09,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:09,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:55:09,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:09,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:55:09,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:09,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:09,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:55:09,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:09,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2020-10-14 17:55:09,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171947941] [2020-10-14 17:55:09,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:09,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:55:09,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139878808] [2020-10-14 17:55:09,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:55:09,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:55:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:09,991 INFO L87 Difference]: Start difference. First operand 297 states and 302 transitions. Second operand 37 states. [2020-10-14 17:55:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:10,759 INFO L93 Difference]: Finished difference Result 530 states and 542 transitions. [2020-10-14 17:55:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:55:10,759 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 293 [2020-10-14 17:55:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:10,761 INFO L225 Difference]: With dead ends: 530 [2020-10-14 17:55:10,761 INFO L226 Difference]: Without dead ends: 309 [2020-10-14 17:55:10,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-14 17:55:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 305. [2020-10-14 17:55:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-14 17:55:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 310 transitions. [2020-10-14 17:55:10,779 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 310 transitions. Word has length 293 [2020-10-14 17:55:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:10,780 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 310 transitions. [2020-10-14 17:55:10,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:55:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 310 transitions. [2020-10-14 17:55:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-14 17:55:10,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:10,781 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:10,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:55:10,781 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1506369815, now seen corresponding path program 34 times [2020-10-14 17:55:10,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:10,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259413358] [2020-10-14 17:55:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:10,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:16,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:16,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-14 17:55:16,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5263 [2020-10-14 17:55:16,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:16,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:55:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-14 17:55:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:55:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:16,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:16,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:16,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:16,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:16,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:16,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:16,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:16,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:16,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2020-10-14 17:55:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:16,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:16,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:16,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:55:16,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:16,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:16,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:16,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:16,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:16,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:55:16,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:16,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4628 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 3470 trivial. 0 not checked. [2020-10-14 17:55:16,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259413358] [2020-10-14 17:55:16,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:16,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:55:16,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338705028] [2020-10-14 17:55:16,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:55:16,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:55:16,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:55:16,959 INFO L87 Difference]: Start difference. First operand 305 states and 310 transitions. Second operand 38 states. [2020-10-14 17:55:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:17,813 INFO L93 Difference]: Finished difference Result 544 states and 556 transitions. [2020-10-14 17:55:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:55:17,813 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 301 [2020-10-14 17:55:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:17,816 INFO L225 Difference]: With dead ends: 544 [2020-10-14 17:55:17,816 INFO L226 Difference]: Without dead ends: 317 [2020-10-14 17:55:17,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:55:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-14 17:55:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 313. [2020-10-14 17:55:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-14 17:55:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 318 transitions. [2020-10-14 17:55:17,840 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 318 transitions. Word has length 301 [2020-10-14 17:55:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:17,840 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 318 transitions. [2020-10-14 17:55:17,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:55:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 318 transitions. [2020-10-14 17:55:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-14 17:55:17,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:17,843 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:17,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:55:17,843 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash -85840927, now seen corresponding path program 35 times [2020-10-14 17:55:17,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:17,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100442366] [2020-10-14 17:55:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:17,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:23,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:23,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-14 17:55:23,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:23,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5165 [2020-10-14 17:55:23,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:23,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:23,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 17:55:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:55:23,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:55:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:23,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:23,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:23,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:23,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:23,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:23,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:23,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:23,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:23,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 297 [2020-10-14 17:55:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:23,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:23,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:23,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:55:23,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:23,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:55:23,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:23,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:55:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:23,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4904 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 3677 trivial. 0 not checked. [2020-10-14 17:55:23,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100442366] [2020-10-14 17:55:23,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:23,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 17:55:23,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941440135] [2020-10-14 17:55:23,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 17:55:23,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:23,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 17:55:23,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:55:23,969 INFO L87 Difference]: Start difference. First operand 313 states and 318 transitions. Second operand 39 states. [2020-10-14 17:55:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:24,956 INFO L93 Difference]: Finished difference Result 558 states and 570 transitions. [2020-10-14 17:55:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 17:55:24,957 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 309 [2020-10-14 17:55:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:24,959 INFO L225 Difference]: With dead ends: 558 [2020-10-14 17:55:24,959 INFO L226 Difference]: Without dead ends: 325 [2020-10-14 17:55:24,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:55:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-14 17:55:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2020-10-14 17:55:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-14 17:55:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 326 transitions. [2020-10-14 17:55:24,983 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 326 transitions. Word has length 309 [2020-10-14 17:55:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:24,984 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 326 transitions. [2020-10-14 17:55:24,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 17:55:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 326 transitions. [2020-10-14 17:55:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-14 17:55:24,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:24,986 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:24,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:55:24,987 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:24,987 INFO L82 PathProgramCache]: Analyzing trace with hash -6381351, now seen corresponding path program 36 times [2020-10-14 17:55:24,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:24,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119223326] [2020-10-14 17:55:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking...