/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/loops-crafted-1/in-de42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:24:34,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:24:34,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:24:34,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:24:34,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:24:34,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:24:34,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:24:34,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:24:34,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:24:34,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:24:34,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:24:34,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:24:34,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:24:34,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:24:34,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:24:34,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:24:34,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:24:34,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:24:34,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:24:34,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:24:34,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:24:34,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:24:34,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:24:34,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:24:34,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:24:34,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:24:34,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:24:34,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:24:34,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:24:34,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:24:34,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:24:34,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:24:34,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:24:34,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:24:34,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:24:34,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:24:34,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:24:34,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:24:34,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:24:34,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:24:34,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:24:34,685 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 05:24:34,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:24:34,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:24:34,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:24:34,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:24:34,738 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:24:34,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:24:34,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:24:34,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:24:34,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:24:34,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:24:34,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:24:34,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:24:34,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:24:34,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:24:34,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:24:34,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:24:34,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:24:34,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:24:34,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:24:34,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:24:34,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:24:34,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:24:34,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:24:34,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:24:34,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:24:34,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:24:34,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:24:34,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:24:34,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:24:34,746 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:24:35,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:24:35,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:24:35,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:24:35,096 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:24:35,096 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:24:35,097 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-14 05:24:35,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ff4532d7/cbf8f5b003e84f938fa9711453f83c2e/FLAGdbebae3e7 [2020-10-14 05:24:35,603 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:24:35,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-14 05:24:35,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ff4532d7/cbf8f5b003e84f938fa9711453f83c2e/FLAGdbebae3e7 [2020-10-14 05:24:35,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ff4532d7/cbf8f5b003e84f938fa9711453f83c2e [2020-10-14 05:24:36,000 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:24:36,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:24:36,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:36,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:24:36,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:24:36,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:35" (1/1) ... [2020-10-14 05:24:36,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fa4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36, skipping insertion in model container [2020-10-14 05:24:36,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:35" (1/1) ... [2020-10-14 05:24:36,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:24:36,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:24:36,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:36,259 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:24:36,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:36,291 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:24:36,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36 WrapperNode [2020-10-14 05:24:36,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:36,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:24:36,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:24:36,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:24:36,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (1/1) ... [2020-10-14 05:24:36,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (1/1) ... [2020-10-14 05:24:36,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (1/1) ... [2020-10-14 05:24:36,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (1/1) ... [2020-10-14 05:24:36,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (1/1) ... [2020-10-14 05:24:36,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (1/1) ... [2020-10-14 05:24:36,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (1/1) ... [2020-10-14 05:24:36,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:24:36,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:24:36,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:24:36,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:24:36,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (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 05:24:36,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:24:36,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:24:36,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:24:36,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:24:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:24:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:24:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:24:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:24:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:24:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:24:36,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:24:36,688 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 05:24:36,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:36 BoogieIcfgContainer [2020-10-14 05:24:36,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:24:36,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:24:36,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:24:36,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:24:36,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:24:35" (1/3) ... [2020-10-14 05:24:36,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6275e7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:36, skipping insertion in model container [2020-10-14 05:24:36,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:36" (2/3) ... [2020-10-14 05:24:36,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6275e7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:36, skipping insertion in model container [2020-10-14 05:24:36,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:36" (3/3) ... [2020-10-14 05:24:36,700 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de42.c [2020-10-14 05:24:36,710 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:24:36,718 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:24:36,733 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:24:36,761 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:24:36,761 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:24:36,761 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:24:36,762 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:24:36,762 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:24:36,762 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:24:36,762 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:24:36,762 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:24:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-14 05:24:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:24:36,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:36,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:36,797 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1870796656, now seen corresponding path program 1 times [2020-10-14 05:24:36,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:36,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822227770] [2020-10-14 05:24:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:36,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:37,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:24:37,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:37,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-14 05:24:37,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:37,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:37,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:37,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:24:37,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:37,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:24:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:37,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:37,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:37,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:37,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:24:37,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:37,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 05:24:37,444 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 05:24:37,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822227770] [2020-10-14 05:24:37,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:37,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:24:37,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957769589] [2020-10-14 05:24:37,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:24:37,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:37,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:24:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:24:37,472 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-10-14 05:24:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:37,497 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2020-10-14 05:24:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:24:37,498 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-14 05:24:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:37,507 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:24:37,508 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 05:24:37,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:24:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 05:24:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 05:24:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:24:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-14 05:24:37,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 14 [2020-10-14 05:24:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:37,553 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-14 05:24:37,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:24:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-10-14 05:24:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:24:37,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:37,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:37,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:24:37,555 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1867102572, now seen corresponding path program 1 times [2020-10-14 05:24:37,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:37,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158473325] [2020-10-14 05:24:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:37,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:37,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:37,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:24:37,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:37,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-14 05:24:37,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:37,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:37,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:24:37,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:37,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:37,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:38,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:38,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:38,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:38,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:38,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,091 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 05:24:38,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158473325] [2020-10-14 05:24:38,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:38,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:24:38,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934830881] [2020-10-14 05:24:38,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:38,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:38,095 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-10-14 05:24:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:38,202 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-10-14 05:24:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:38,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-14 05:24:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:38,206 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:24:38,206 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:24:38,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:24:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-14 05:24:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:24:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-14 05:24:38,215 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-10-14 05:24:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:38,215 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-14 05:24:38,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-10-14 05:24:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:38,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:38,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:38,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:24:38,217 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2081142662, now seen corresponding path program 1 times [2020-10-14 05:24:38,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:38,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675440114] [2020-10-14 05:24:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:38,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 05:24:38,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:24:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:38,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:38,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:38,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:38,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675440114] [2020-10-14 05:24:38,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:38,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:24:38,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226810428] [2020-10-14 05:24:38,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:24:38,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:38,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:24:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:38,269 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 3 states. [2020-10-14 05:24:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:38,286 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-10-14 05:24:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:24:38,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-14 05:24:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:38,288 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:24:38,288 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:24:38,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:24:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:24:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:24:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-10-14 05:24:38,295 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2020-10-14 05:24:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:38,295 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-10-14 05:24:38,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:24:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-10-14 05:24:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:38,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:38,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:38,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:24:38,297 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash -810996235, now seen corresponding path program 1 times [2020-10-14 05:24:38,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:38,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642031548] [2020-10-14 05:24:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:38,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-14 05:24:38,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:24:38,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:38,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:38,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:38,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:38,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:38,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:38,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:38,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:38,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642031548] [2020-10-14 05:24:38,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:38,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:24:38,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106303612] [2020-10-14 05:24:38,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:24:38,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:38,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:24:38,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:38,388 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 3 states. [2020-10-14 05:24:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:38,408 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-10-14 05:24:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:24:38,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-14 05:24:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:38,411 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:24:38,411 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:24:38,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:24:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-14 05:24:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:24:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-10-14 05:24:38,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 15 [2020-10-14 05:24:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:38,424 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-10-14 05:24:38,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:24:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-10-14 05:24:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:38,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:38,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:38,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:24:38,428 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash -272988826, now seen corresponding path program 1 times [2020-10-14 05:24:38,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:38,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818621843] [2020-10-14 05:24:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:38,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:38,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-14 05:24:38,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:38,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:38,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:24:38,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:38,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:38,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:38,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:38,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818621843] [2020-10-14 05:24:38,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:38,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:38,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190488479] [2020-10-14 05:24:38,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:38,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:38,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:38,677 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 4 states. [2020-10-14 05:24:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:38,711 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-10-14 05:24:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:38,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 05:24:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:38,713 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:24:38,713 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:24:38,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 05:24:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:24:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:24:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:24:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-14 05:24:38,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-10-14 05:24:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:38,720 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-14 05:24:38,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-14 05:24:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:38,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:38,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:38,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:24:38,722 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:38,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1211614777, now seen corresponding path program 1 times [2020-10-14 05:24:38,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:38,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818772798] [2020-10-14 05:24:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:38,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:38,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:24:38,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:38,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:38,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:24:38,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:38,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:38,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:38,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:38,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:38,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:38,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818772798] [2020-10-14 05:24:38,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:38,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:38,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904092184] [2020-10-14 05:24:38,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:38,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:38,832 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-14 05:24:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:38,863 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2020-10-14 05:24:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:38,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 05:24:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:38,865 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:24:38,866 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:24:38,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 05:24:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:24:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-14 05:24:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:24:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2020-10-14 05:24:38,875 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2020-10-14 05:24:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:38,875 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2020-10-14 05:24:38,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-10-14 05:24:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:38,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:38,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:38,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:24:38,877 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:38,878 INFO L82 PathProgramCache]: Analyzing trace with hash 162818764, now seen corresponding path program 1 times [2020-10-14 05:24:38,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:38,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691311808] [2020-10-14 05:24:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:38,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:38,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-14 05:24:38,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:38,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:38,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:24:38,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:38,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:38,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:38,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:38,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691311808] [2020-10-14 05:24:38,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:38,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:24:38,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973000862] [2020-10-14 05:24:38,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:38,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:38,968 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand 4 states. [2020-10-14 05:24:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:38,997 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-10-14 05:24:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:38,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 05:24:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:38,999 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:24:38,999 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 05:24:39,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 05:24:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 05:24:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:24:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2020-10-14 05:24:39,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 16 [2020-10-14 05:24:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:39,006 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2020-10-14 05:24:39,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2020-10-14 05:24:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:39,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:39,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:39,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:24:39,008 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1761953542, now seen corresponding path program 1 times [2020-10-14 05:24:39,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:39,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314216838] [2020-10-14 05:24:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:39,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-14 05:24:39,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:39,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:39,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:39,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:39,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:39,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:39,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:39,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:39,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:39,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:39,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314216838] [2020-10-14 05:24:39,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:39,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:39,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155493123] [2020-10-14 05:24:39,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:39,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:39,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:39,265 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand 5 states. [2020-10-14 05:24:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:39,316 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-10-14 05:24:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:39,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:24:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:39,318 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:24:39,318 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:24:39,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:24:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-14 05:24:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:24:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-14 05:24:39,324 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 16 [2020-10-14 05:24:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:39,325 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-14 05:24:39,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-14 05:24:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:39,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:39,326 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:39,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:24:39,326 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2132395212, now seen corresponding path program 2 times [2020-10-14 05:24:39,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:39,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263571926] [2020-10-14 05:24:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:39,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:39,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-14 05:24:39,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:39,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:39,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:39,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:39,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:39,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:39,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:39,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:39,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263571926] [2020-10-14 05:24:39,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:39,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:39,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194256457] [2020-10-14 05:24:39,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:39,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:39,448 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 5 states. [2020-10-14 05:24:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:39,489 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2020-10-14 05:24:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:39,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:24:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:39,490 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:24:39,490 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:24:39,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:24:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-14 05:24:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:24:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-10-14 05:24:39,497 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 16 [2020-10-14 05:24:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:39,498 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-10-14 05:24:39,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-10-14 05:24:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:24:39,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:39,499 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:39,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:24:39,500 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:39,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1176858987, now seen corresponding path program 2 times [2020-10-14 05:24:39,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:39,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658253158] [2020-10-14 05:24:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:24:39,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:39,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-14 05:24:39,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:39,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:24:39,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:24:39,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:39,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:39,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:39,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:39,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:39,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658253158] [2020-10-14 05:24:39,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:39,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:24:39,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964240961] [2020-10-14 05:24:39,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:39,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:39,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:39,679 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 4 states. [2020-10-14 05:24:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:39,713 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-10-14 05:24:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:39,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 05:24:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:39,715 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:24:39,715 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:24:39,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:24:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-14 05:24:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:24:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-10-14 05:24:39,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2020-10-14 05:24:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:39,722 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-10-14 05:24:39,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-10-14 05:24:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:24:39,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:39,723 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:39,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:24:39,724 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:39,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1577477529, now seen corresponding path program 3 times [2020-10-14 05:24:39,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:39,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721281718] [2020-10-14 05:24:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:24:39,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:39,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-14 05:24:39,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:39,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:39,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:39,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:39,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:39,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:39,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:39,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:39,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:39,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:39,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721281718] [2020-10-14 05:24:39,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:39,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:39,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517303661] [2020-10-14 05:24:39,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:39,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:39,877 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 6 states. [2020-10-14 05:24:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:39,935 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2020-10-14 05:24:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:39,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 05:24:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:39,937 INFO L225 Difference]: With dead ends: 63 [2020-10-14 05:24:39,937 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:24:39,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:24:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-14 05:24:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:24:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2020-10-14 05:24:39,944 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 17 [2020-10-14 05:24:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:39,945 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2020-10-14 05:24:39,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2020-10-14 05:24:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:24:39,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:39,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:39,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:24:39,946 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:39,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2010945700, now seen corresponding path program 1 times [2020-10-14 05:24:39,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:39,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215788090] [2020-10-14 05:24:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:40,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:40,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:40,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:40,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:24:40,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:40,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-14 05:24:40,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:40,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:40,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:24:40,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:40,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:24:40,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:40,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:40,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:40,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:40,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:40,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:40,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:40,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:40,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:40,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:40,697 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 05:24:40,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215788090] [2020-10-14 05:24:40,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:40,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:24:40,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716834535] [2020-10-14 05:24:40,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:24:40,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:24:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:40,700 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 10 states. [2020-10-14 05:24:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:40,924 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-10-14 05:24:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:24:40,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 05:24:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:40,926 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:24:40,926 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:24:40,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:24:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:24:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 05:24:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:24:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-10-14 05:24:40,933 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 18 [2020-10-14 05:24:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:40,933 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-10-14 05:24:40,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:24:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-10-14 05:24:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:24:40,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:40,935 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:40,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:24:40,935 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash -619415508, now seen corresponding path program 4 times [2020-10-14 05:24:40,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:40,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820399244] [2020-10-14 05:24:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:40,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:40,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:24:41,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:41,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-14 05:24:41,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:24:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:24:41,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:41,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:41,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:41,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:41,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:41,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:41,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:41,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820399244] [2020-10-14 05:24:41,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:41,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:24:41,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804081111] [2020-10-14 05:24:41,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:41,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:41,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:41,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:41,184 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2020-10-14 05:24:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:41,258 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2020-10-14 05:24:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:41,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:24:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:41,259 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:24:41,260 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:24:41,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:24:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-10-14 05:24:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:24:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-10-14 05:24:41,267 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2020-10-14 05:24:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:41,267 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-10-14 05:24:41,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-10-14 05:24:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:41,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:41,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:41,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:24:41,269 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2120730518, now seen corresponding path program 2 times [2020-10-14 05:24:41,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:41,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382153079] [2020-10-14 05:24:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:41,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:41,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:41,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 05:24:41,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:41,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:24:41,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:41,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:41,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:41,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:41,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:41,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:41,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:24:41,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382153079] [2020-10-14 05:24:41,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:41,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:41,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384244850] [2020-10-14 05:24:41,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:41,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:41,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:41,363 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 4 states. [2020-10-14 05:24:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:41,394 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2020-10-14 05:24:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:41,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 05:24:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:41,396 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:24:41,396 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:24:41,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 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 05:24:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:24:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-14 05:24:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:24:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2020-10-14 05:24:41,402 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 19 [2020-10-14 05:24:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:41,402 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2020-10-14 05:24:41,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2020-10-14 05:24:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:41,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:41,404 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:41,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:24:41,404 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash -984263929, now seen corresponding path program 5 times [2020-10-14 05:24:41,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:41,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339472586] [2020-10-14 05:24:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:41,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:41,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:41,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-14 05:24:41,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:41,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:41,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:24:41,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:41,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:41,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:41,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:41,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:41,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339472586] [2020-10-14 05:24:41,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:41,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:41,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090943838] [2020-10-14 05:24:41,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:41,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:41,665 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 8 states. [2020-10-14 05:24:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:41,773 INFO L93 Difference]: Finished difference Result 78 states and 110 transitions. [2020-10-14 05:24:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:41,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-14 05:24:41,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:41,774 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:24:41,774 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:24:41,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:24:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-14 05:24:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:24:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-14 05:24:41,780 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 19 [2020-10-14 05:24:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:41,781 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-14 05:24:41,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-14 05:24:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:41,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:41,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:41,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:24:41,782 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:41,783 INFO L82 PathProgramCache]: Analyzing trace with hash -61628532, now seen corresponding path program 3 times [2020-10-14 05:24:41,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:41,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179905326] [2020-10-14 05:24:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:41,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:42,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:42,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:42,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-14 05:24:42,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:42,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:42,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:24:42,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:42,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:42,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:42,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:42,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:42,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:42,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:42,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:42,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:42,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:42,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:24:42,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179905326] [2020-10-14 05:24:42,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:42,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:24:42,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678222814] [2020-10-14 05:24:42,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:42,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:42,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:42,244 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 7 states. [2020-10-14 05:24:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:42,319 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-10-14 05:24:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:42,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 05:24:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:42,320 INFO L225 Difference]: With dead ends: 70 [2020-10-14 05:24:42,321 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:24:42,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:24:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-10-14 05:24:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:24:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2020-10-14 05:24:42,326 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 20 [2020-10-14 05:24:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:42,327 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2020-10-14 05:24:42,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2020-10-14 05:24:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:42,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:42,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:42,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:24:42,328 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1324722900, now seen corresponding path program 1 times [2020-10-14 05:24:42,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:42,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267354566] [2020-10-14 05:24:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:42,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:42,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:42,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:42,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-14 05:24:42,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:42,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:42,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:42,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:42,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:42,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:42,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:42,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:42,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:42,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:42,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267354566] [2020-10-14 05:24:42,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:42,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:42,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940775320] [2020-10-14 05:24:42,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:42,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:42,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:42,495 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand 5 states. [2020-10-14 05:24:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:42,614 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2020-10-14 05:24:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:42,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 05:24:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:42,616 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:24:42,616 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:24:42,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:24:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-14 05:24:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 05:24:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2020-10-14 05:24:42,623 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 20 [2020-10-14 05:24:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:42,623 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2020-10-14 05:24:42,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2020-10-14 05:24:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:42,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:42,624 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:42,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:24:42,624 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash 590336908, now seen corresponding path program 6 times [2020-10-14 05:24:42,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:42,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888020250] [2020-10-14 05:24:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:42,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:42,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:42,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:42,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-14 05:24:42,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:42,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:24:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:42,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:42,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:42,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:42,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:42,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:42,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:42,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:42,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:42,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:42,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:42,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:42,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:42,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888020250] [2020-10-14 05:24:42,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:42,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:24:42,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588791182] [2020-10-14 05:24:42,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:24:42,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:42,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:24:42,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:42,890 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand 9 states. [2020-10-14 05:24:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:43,014 INFO L93 Difference]: Finished difference Result 110 states and 160 transitions. [2020-10-14 05:24:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:24:43,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-14 05:24:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:43,015 INFO L225 Difference]: With dead ends: 110 [2020-10-14 05:24:43,015 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:24:43,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:24:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-10-14 05:24:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:24:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2020-10-14 05:24:43,023 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 20 [2020-10-14 05:24:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:43,023 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2020-10-14 05:24:43,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:24:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2020-10-14 05:24:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:24:43,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:43,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:43,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:24:43,025 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1918800838, now seen corresponding path program 4 times [2020-10-14 05:24:43,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:43,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491091437] [2020-10-14 05:24:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:43,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:43,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:24:43,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-14 05:24:43,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:43,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:24:43,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:43,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:43,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:43,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:43,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:43,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:43,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:43,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:43,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:43,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:43,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:43,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:24:43,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491091437] [2020-10-14 05:24:43,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:43,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:43,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180510690] [2020-10-14 05:24:43,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:43,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:43,238 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand 5 states. [2020-10-14 05:24:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:43,400 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2020-10-14 05:24:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:43,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 05:24:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:43,402 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:24:43,402 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:24:43,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:24:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-14 05:24:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 05:24:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 105 transitions. [2020-10-14 05:24:43,411 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 105 transitions. Word has length 21 [2020-10-14 05:24:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:43,411 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 105 transitions. [2020-10-14 05:24:43,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 105 transitions. [2020-10-14 05:24:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:24:43,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:43,412 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:43,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:24:43,412 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash 655706470, now seen corresponding path program 2 times [2020-10-14 05:24:43,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:43,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404137627] [2020-10-14 05:24:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:43,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:43,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:44,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:24:44,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:44,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-14 05:24:44,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:44,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:24:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:24:44,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:44,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:44,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:44,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:44,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:44,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:44,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:44,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:44,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:44,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:44,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:44,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:44,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404137627] [2020-10-14 05:24:44,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:44,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:44,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81678009] [2020-10-14 05:24:44,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:44,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:44,264 INFO L87 Difference]: Start difference. First operand 78 states and 105 transitions. Second operand 6 states. [2020-10-14 05:24:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:44,335 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2020-10-14 05:24:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:44,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 05:24:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:44,336 INFO L225 Difference]: With dead ends: 100 [2020-10-14 05:24:44,337 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 05:24:44,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 05:24:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-14 05:24:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 05:24:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2020-10-14 05:24:44,347 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 21 [2020-10-14 05:24:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:44,347 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2020-10-14 05:24:44,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2020-10-14 05:24:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:24:44,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:44,349 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:44,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:24:44,349 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2136644697, now seen corresponding path program 7 times [2020-10-14 05:24:44,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:44,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041308915] [2020-10-14 05:24:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:44,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:44,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:24:44,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-14 05:24:44,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:44,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:24:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:44,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:44,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:44,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:44,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:44,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:44,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:44,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:44,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:44,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:44,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:44,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:44,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:44,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:44,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041308915] [2020-10-14 05:24:44,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:44,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:24:44,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898528735] [2020-10-14 05:24:44,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:24:44,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:44,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:24:44,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:44,794 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand 10 states. [2020-10-14 05:24:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:44,980 INFO L93 Difference]: Finished difference Result 148 states and 221 transitions. [2020-10-14 05:24:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:24:44,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 05:24:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:44,982 INFO L225 Difference]: With dead ends: 148 [2020-10-14 05:24:44,982 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 05:24:44,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 05:24:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-10-14 05:24:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:24:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 142 transitions. [2020-10-14 05:24:45,001 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 142 transitions. Word has length 21 [2020-10-14 05:24:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:45,001 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 142 transitions. [2020-10-14 05:24:45,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:24:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 142 transitions. [2020-10-14 05:24:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:24:45,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:45,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:45,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:24:45,005 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash -611178388, now seen corresponding path program 5 times [2020-10-14 05:24:45,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:45,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694102037] [2020-10-14 05:24:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:45,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:45,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:45,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:45,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:45,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:45,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:24:45,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:45,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-14 05:24:45,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:45,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:45,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:24:45,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:45,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:24:45,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:46,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:46,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:46,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:46,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:46,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:46,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:46,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:46,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:46,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:46,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:46,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:46,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694102037] [2020-10-14 05:24:46,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:46,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:24:46,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182005823] [2020-10-14 05:24:46,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:24:46,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:24:46,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:24:46,140 INFO L87 Difference]: Start difference. First operand 103 states and 142 transitions. Second operand 13 states. [2020-10-14 05:24:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:53,120 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2020-10-14 05:24:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:24:53,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-14 05:24:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:53,123 INFO L225 Difference]: With dead ends: 129 [2020-10-14 05:24:53,124 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 05:24:53,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=78, Invalid=426, Unknown=2, NotChecked=0, Total=506 [2020-10-14 05:24:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 05:24:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-10-14 05:24:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 05:24:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 152 transitions. [2020-10-14 05:24:53,139 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 152 transitions. Word has length 22 [2020-10-14 05:24:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:53,140 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 152 transitions. [2020-10-14 05:24:53,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:24:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 152 transitions. [2020-10-14 05:24:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:24:53,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:53,140 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:53,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:24:53,141 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1112398132, now seen corresponding path program 6 times [2020-10-14 05:24:53,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:53,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025263324] [2020-10-14 05:24:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:53,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:53,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:54,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:24:54,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:54,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-14 05:24:54,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:54,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:54,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:54,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:24:54,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:54,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:54,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:54,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:54,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:54,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:54,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025263324] [2020-10-14 05:24:54,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:54,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:54,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246630576] [2020-10-14 05:24:54,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:54,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:54,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:54,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:54,284 INFO L87 Difference]: Start difference. First operand 112 states and 152 transitions. Second operand 6 states. [2020-10-14 05:24:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:54,509 INFO L93 Difference]: Finished difference Result 123 states and 166 transitions. [2020-10-14 05:24:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:54,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 05:24:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:54,511 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:24:54,511 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:24:54,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:24:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-10-14 05:24:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 05:24:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2020-10-14 05:24:54,527 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 22 [2020-10-14 05:24:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:54,527 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2020-10-14 05:24:54,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2020-10-14 05:24:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:24:54,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:54,528 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:54,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:24:54,529 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1919474796, now seen corresponding path program 3 times [2020-10-14 05:24:54,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:54,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254172602] [2020-10-14 05:24:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:24:55,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:55,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-14 05:24:55,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:24:55,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:24:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:55,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:55,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:55,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:55,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:55,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:55,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:55,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:55,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254172602] [2020-10-14 05:24:55,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:55,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:24:55,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962278697] [2020-10-14 05:24:55,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:55,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:55,427 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand 7 states. [2020-10-14 05:24:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:55,563 INFO L93 Difference]: Finished difference Result 145 states and 197 transitions. [2020-10-14 05:24:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:55,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 05:24:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:55,565 INFO L225 Difference]: With dead ends: 145 [2020-10-14 05:24:55,565 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 05:24:55,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 05:24:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2020-10-14 05:24:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 05:24:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 177 transitions. [2020-10-14 05:24:55,580 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 177 transitions. Word has length 22 [2020-10-14 05:24:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:55,581 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 177 transitions. [2020-10-14 05:24:55,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 177 transitions. [2020-10-14 05:24:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:24:55,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:55,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:55,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:24:55,582 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash 25976860, now seen corresponding path program 7 times [2020-10-14 05:24:55,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:55,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885832698] [2020-10-14 05:24:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:24:56,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:56,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-14 05:24:56,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:56,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:56,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:56,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:56,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:56,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:56,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:56,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:56,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:56,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:24:56,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885832698] [2020-10-14 05:24:56,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:56,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:56,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705528665] [2020-10-14 05:24:56,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:56,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:56,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:56,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:56,263 INFO L87 Difference]: Start difference. First operand 129 states and 177 transitions. Second operand 8 states. [2020-10-14 05:24:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:56,438 INFO L93 Difference]: Finished difference Result 163 states and 211 transitions. [2020-10-14 05:24:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:24:56,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 05:24:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:56,440 INFO L225 Difference]: With dead ends: 163 [2020-10-14 05:24:56,440 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 05:24:56,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 05:24:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 129. [2020-10-14 05:24:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 05:24:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 176 transitions. [2020-10-14 05:24:56,460 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 176 transitions. Word has length 22 [2020-10-14 05:24:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:56,461 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 176 transitions. [2020-10-14 05:24:56,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 176 transitions. [2020-10-14 05:24:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:24:56,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:56,463 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:56,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:24:56,463 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:56,464 INFO L82 PathProgramCache]: Analyzing trace with hash -773728532, now seen corresponding path program 8 times [2020-10-14 05:24:56,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:56,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868442304] [2020-10-14 05:24:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:24:56,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:56,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-14 05:24:56,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:24:56,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:56,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:24:56,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:56,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:56,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:56,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:56,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:56,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:56,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868442304] [2020-10-14 05:24:56,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:56,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:24:56,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633084801] [2020-10-14 05:24:56,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:24:56,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:56,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:24:56,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:56,881 INFO L87 Difference]: Start difference. First operand 129 states and 176 transitions. Second operand 11 states. [2020-10-14 05:24:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:57,188 INFO L93 Difference]: Finished difference Result 201 states and 301 transitions. [2020-10-14 05:24:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:24:57,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 05:24:57,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:57,190 INFO L225 Difference]: With dead ends: 201 [2020-10-14 05:24:57,190 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 05:24:57,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 05:24:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2020-10-14 05:24:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 05:24:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2020-10-14 05:24:57,212 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 22 [2020-10-14 05:24:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:57,212 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2020-10-14 05:24:57,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:24:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2020-10-14 05:24:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:24:57,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:57,214 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:57,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:24:57,215 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash -590285690, now seen corresponding path program 8 times [2020-10-14 05:24:57,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:57,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375711307] [2020-10-14 05:24:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:24:59,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:59,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1866 [2020-10-14 05:24:59,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:24:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:59,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:59,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:59,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:59,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375711307] [2020-10-14 05:24:59,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:59,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:59,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72731157] [2020-10-14 05:24:59,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:59,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:59,274 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand 8 states. [2020-10-14 05:24:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:59,466 INFO L93 Difference]: Finished difference Result 178 states and 247 transitions. [2020-10-14 05:24:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:59,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 05:24:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:59,470 INFO L225 Difference]: With dead ends: 178 [2020-10-14 05:24:59,470 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 05:24:59,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 05:24:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2020-10-14 05:24:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 05:24:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 223 transitions. [2020-10-14 05:24:59,499 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 223 transitions. Word has length 23 [2020-10-14 05:24:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:59,499 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 223 transitions. [2020-10-14 05:24:59,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 223 transitions. [2020-10-14 05:24:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:24:59,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:59,501 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:59,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:24:59,502 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1473000377, now seen corresponding path program 9 times [2020-10-14 05:24:59,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:59,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653853416] [2020-10-14 05:24:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:24:59,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:59,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-14 05:24:59,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:24:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:24:59,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:59,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:59,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:59,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:59,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653853416] [2020-10-14 05:24:59,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:59,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:24:59,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346495043] [2020-10-14 05:24:59,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:24:59,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:59,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:24:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:59,953 INFO L87 Difference]: Start difference. First operand 161 states and 223 transitions. Second operand 12 states. [2020-10-14 05:25:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:00,235 INFO L93 Difference]: Finished difference Result 251 states and 382 transitions. [2020-10-14 05:25:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:25:00,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-14 05:25:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:00,237 INFO L225 Difference]: With dead ends: 251 [2020-10-14 05:25:00,237 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 05:25:00,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 05:25:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 176. [2020-10-14 05:25:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-14 05:25:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 245 transitions. [2020-10-14 05:25:00,257 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 245 transitions. Word has length 23 [2020-10-14 05:25:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:00,258 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 245 transitions. [2020-10-14 05:25:00,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:25:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 245 transitions. [2020-10-14 05:25:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:00,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:00,259 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:00,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:25:00,259 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1569460748, now seen corresponding path program 9 times [2020-10-14 05:25:00,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:00,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489497727] [2020-10-14 05:25:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:00,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:00,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-14 05:25:00,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:00,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:00,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:00,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:00,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:00,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:00,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:00,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:00,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:00,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:00,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489497727] [2020-10-14 05:25:00,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:00,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:00,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6401582] [2020-10-14 05:25:00,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:00,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:00,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:00,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:00,945 INFO L87 Difference]: Start difference. First operand 176 states and 245 transitions. Second operand 8 states. [2020-10-14 05:25:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:01,253 INFO L93 Difference]: Finished difference Result 285 states and 369 transitions. [2020-10-14 05:25:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:01,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 05:25:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:01,255 INFO L225 Difference]: With dead ends: 285 [2020-10-14 05:25:01,255 INFO L226 Difference]: Without dead ends: 250 [2020-10-14 05:25:01,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-14 05:25:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 162. [2020-10-14 05:25:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-14 05:25:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 218 transitions. [2020-10-14 05:25:01,277 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 218 transitions. Word has length 24 [2020-10-14 05:25:01,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:01,277 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 218 transitions. [2020-10-14 05:25:01,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 218 transitions. [2020-10-14 05:25:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:01,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:01,278 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:01,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:25:01,279 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:01,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1859614010, now seen corresponding path program 10 times [2020-10-14 05:25:01,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:01,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548901714] [2020-10-14 05:25:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:02,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-14 05:25:02,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:02,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:02,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:02,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:02,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:02,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:02,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:02,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548901714] [2020-10-14 05:25:02,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:02,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:02,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986130665] [2020-10-14 05:25:02,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:02,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:02,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:02,508 INFO L87 Difference]: Start difference. First operand 162 states and 218 transitions. Second operand 9 states. [2020-10-14 05:25:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:02,657 INFO L93 Difference]: Finished difference Result 198 states and 254 transitions. [2020-10-14 05:25:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:02,658 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 05:25:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:02,659 INFO L225 Difference]: With dead ends: 198 [2020-10-14 05:25:02,659 INFO L226 Difference]: Without dead ends: 186 [2020-10-14 05:25:02,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-14 05:25:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2020-10-14 05:25:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-14 05:25:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 217 transitions. [2020-10-14 05:25:02,680 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 217 transitions. Word has length 24 [2020-10-14 05:25:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:02,681 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 217 transitions. [2020-10-14 05:25:02,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 217 transitions. [2020-10-14 05:25:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:02,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:02,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:02,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:25:02,682 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1176237132, now seen corresponding path program 11 times [2020-10-14 05:25:02,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:02,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175492531] [2020-10-14 05:25:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:03,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:03,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:03,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-14 05:25:03,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:03,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:25:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:25:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:03,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:03,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:03,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:03,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:03,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:03,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 05:25:03,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175492531] [2020-10-14 05:25:03,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:03,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:03,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53566994] [2020-10-14 05:25:03,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:03,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:03,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:03,774 INFO L87 Difference]: Start difference. First operand 162 states and 217 transitions. Second operand 6 states. [2020-10-14 05:25:03,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:03,894 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2020-10-14 05:25:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:03,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 05:25:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:03,896 INFO L225 Difference]: With dead ends: 180 [2020-10-14 05:25:03,896 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 05:25:03,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 05:25:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-14 05:25:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 05:25:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 202 transitions. [2020-10-14 05:25:03,914 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 202 transitions. Word has length 24 [2020-10-14 05:25:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:03,915 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 202 transitions. [2020-10-14 05:25:03,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 202 transitions. [2020-10-14 05:25:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:03,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:03,916 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:03,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:25:03,917 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1675591092, now seen corresponding path program 10 times [2020-10-14 05:25:03,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:03,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800456656] [2020-10-14 05:25:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:04,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:04,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:04,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-14 05:25:04,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:04,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:04,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:04,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:04,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:25:04,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:04,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:04,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:04,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:04,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:25:04,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:04,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:04,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:04,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:04,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:04,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:04,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800456656] [2020-10-14 05:25:04,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:04,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:25:04,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001989601] [2020-10-14 05:25:04,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:25:04,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:25:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:04,478 INFO L87 Difference]: Start difference. First operand 153 states and 202 transitions. Second operand 13 states. [2020-10-14 05:25:04,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:04,780 INFO L93 Difference]: Finished difference Result 252 states and 357 transitions. [2020-10-14 05:25:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:25:04,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-14 05:25:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:04,784 INFO L225 Difference]: With dead ends: 252 [2020-10-14 05:25:04,784 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 05:25:04,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 05:25:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 167. [2020-10-14 05:25:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 05:25:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 222 transitions. [2020-10-14 05:25:04,805 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 222 transitions. Word has length 24 [2020-10-14 05:25:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:04,806 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 222 transitions. [2020-10-14 05:25:04,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:25:04,806 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 222 transitions. [2020-10-14 05:25:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:04,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:04,807 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:04,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:25:04,807 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash 634031335, now seen corresponding path program 11 times [2020-10-14 05:25:04,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:04,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885239166] [2020-10-14 05:25:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:05,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:05,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-14 05:25:05,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:25:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:25:05,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:05,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:05,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:05,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:05,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:05,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:05,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:05,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:05,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:05,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885239166] [2020-10-14 05:25:05,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:05,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:25:05,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245978840] [2020-10-14 05:25:05,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:25:05,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:05,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:25:05,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:05,639 INFO L87 Difference]: Start difference. First operand 167 states and 222 transitions. Second operand 14 states. [2020-10-14 05:25:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:06,007 INFO L93 Difference]: Finished difference Result 271 states and 387 transitions. [2020-10-14 05:25:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:25:06,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-14 05:25:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:06,009 INFO L225 Difference]: With dead ends: 271 [2020-10-14 05:25:06,009 INFO L226 Difference]: Without dead ends: 251 [2020-10-14 05:25:06,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-14 05:25:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 181. [2020-10-14 05:25:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 05:25:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 242 transitions. [2020-10-14 05:25:06,033 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 242 transitions. Word has length 25 [2020-10-14 05:25:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:06,034 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 242 transitions. [2020-10-14 05:25:06,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:25:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 242 transitions. [2020-10-14 05:25:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:06,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:06,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:06,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:25:06,035 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:06,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1657076444, now seen corresponding path program 12 times [2020-10-14 05:25:06,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:06,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684916788] [2020-10-14 05:25:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:06,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:06,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:06,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:06,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-14 05:25:06,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:06,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:25:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:25:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:07,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:07,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:07,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:07,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:07,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:07,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:07,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:25:07,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684916788] [2020-10-14 05:25:07,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:07,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:25:07,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253321] [2020-10-14 05:25:07,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:25:07,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:25:07,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:25:07,352 INFO L87 Difference]: Start difference. First operand 181 states and 242 transitions. Second operand 16 states. [2020-10-14 05:25:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:07,867 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2020-10-14 05:25:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:25:07,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-14 05:25:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:07,868 INFO L225 Difference]: With dead ends: 221 [2020-10-14 05:25:07,869 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 05:25:07,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 05:25:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 193. [2020-10-14 05:25:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 05:25:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 256 transitions. [2020-10-14 05:25:07,890 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 256 transitions. Word has length 26 [2020-10-14 05:25:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:07,891 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 256 transitions. [2020-10-14 05:25:07,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:25:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 256 transitions. [2020-10-14 05:25:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:07,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:07,893 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:07,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:25:07,893 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1572259612, now seen corresponding path program 13 times [2020-10-14 05:25:07,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:07,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230159242] [2020-10-14 05:25:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:10,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:10,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:10,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3078 [2020-10-14 05:25:10,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:10,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:10,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:10,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:10,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:25:10,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:11,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:11,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:11,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:11,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:11,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:11,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:11,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:25:11,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230159242] [2020-10-14 05:25:11,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:11,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:11,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691947014] [2020-10-14 05:25:11,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:11,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:11,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:11,108 INFO L87 Difference]: Start difference. First operand 193 states and 256 transitions. Second operand 9 states. [2020-10-14 05:25:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:11,316 INFO L93 Difference]: Finished difference Result 238 states and 320 transitions. [2020-10-14 05:25:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:11,317 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 05:25:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:11,318 INFO L225 Difference]: With dead ends: 238 [2020-10-14 05:25:11,318 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 05:25:11,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 05:25:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 218. [2020-10-14 05:25:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-14 05:25:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 291 transitions. [2020-10-14 05:25:11,339 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 291 transitions. Word has length 26 [2020-10-14 05:25:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:11,339 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 291 transitions. [2020-10-14 05:25:11,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 291 transitions. [2020-10-14 05:25:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:11,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:11,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:11,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:25:11,340 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash -68791060, now seen corresponding path program 14 times [2020-10-14 05:25:11,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:11,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085658097] [2020-10-14 05:25:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:12,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:12,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-14 05:25:12,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:12,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:12,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:12,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:12,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:12,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:12,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:12,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:12,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 05:25:12,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085658097] [2020-10-14 05:25:12,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:12,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:12,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216911002] [2020-10-14 05:25:12,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:12,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:12,562 INFO L87 Difference]: Start difference. First operand 218 states and 291 transitions. Second operand 10 states. [2020-10-14 05:25:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:12,796 INFO L93 Difference]: Finished difference Result 265 states and 338 transitions. [2020-10-14 05:25:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:25:12,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 05:25:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:12,803 INFO L225 Difference]: With dead ends: 265 [2020-10-14 05:25:12,803 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 05:25:12,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 05:25:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 218. [2020-10-14 05:25:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-14 05:25:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 290 transitions. [2020-10-14 05:25:12,829 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 290 transitions. Word has length 26 [2020-10-14 05:25:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:12,830 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 290 transitions. [2020-10-14 05:25:12,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 290 transitions. [2020-10-14 05:25:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:12,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:12,831 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:12,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:25:12,831 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash -782117460, now seen corresponding path program 12 times [2020-10-14 05:25:12,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:12,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763218063] [2020-10-14 05:25:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:13,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:13,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-14 05:25:13,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:25:13,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:13,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:13,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:13,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:13,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:13,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:13,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:13,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:13,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763218063] [2020-10-14 05:25:13,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:13,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:25:13,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836606983] [2020-10-14 05:25:13,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:25:13,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:13,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:25:13,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:13,390 INFO L87 Difference]: Start difference. First operand 218 states and 290 transitions. Second operand 15 states. [2020-10-14 05:25:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:13,812 INFO L93 Difference]: Finished difference Result 345 states and 495 transitions. [2020-10-14 05:25:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:25:13,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-14 05:25:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:13,815 INFO L225 Difference]: With dead ends: 345 [2020-10-14 05:25:13,815 INFO L226 Difference]: Without dead ends: 323 [2020-10-14 05:25:13,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-14 05:25:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 234. [2020-10-14 05:25:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-14 05:25:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 313 transitions. [2020-10-14 05:25:13,839 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 313 transitions. Word has length 26 [2020-10-14 05:25:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:13,839 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 313 transitions. [2020-10-14 05:25:13,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:25:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 313 transitions. [2020-10-14 05:25:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:13,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:13,841 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:13,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:25:13,841 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash -82317768, now seen corresponding path program 15 times [2020-10-14 05:25:13,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:13,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825154634] [2020-10-14 05:25:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:16,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:16,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:16,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2463 [2020-10-14 05:25:16,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:16,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:25:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:16,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:16,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:16,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:16,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:16,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:16,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:25:16,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825154634] [2020-10-14 05:25:16,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:16,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:16,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486262310] [2020-10-14 05:25:16,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:16,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:16,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:16,466 INFO L87 Difference]: Start difference. First operand 234 states and 313 transitions. Second operand 10 states. [2020-10-14 05:25:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:16,667 INFO L93 Difference]: Finished difference Result 282 states and 382 transitions. [2020-10-14 05:25:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:16,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 05:25:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:16,670 INFO L225 Difference]: With dead ends: 282 [2020-10-14 05:25:16,670 INFO L226 Difference]: Without dead ends: 276 [2020-10-14 05:25:16,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-14 05:25:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 261. [2020-10-14 05:25:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-14 05:25:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 351 transitions. [2020-10-14 05:25:16,693 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 351 transitions. Word has length 27 [2020-10-14 05:25:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:16,693 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 351 transitions. [2020-10-14 05:25:16,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 351 transitions. [2020-10-14 05:25:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:16,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:16,695 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:16,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:25:16,695 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1733057145, now seen corresponding path program 13 times [2020-10-14 05:25:16,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:16,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362959367] [2020-10-14 05:25:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:16,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:17,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:17,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:17,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-14 05:25:17,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:17,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:17,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:25:17,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:17,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:25:17,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:17,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:17,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:17,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:17,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:17,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362959367] [2020-10-14 05:25:17,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:17,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:25:17,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882138907] [2020-10-14 05:25:17,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:25:17,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:17,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:25:17,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:25:17,523 INFO L87 Difference]: Start difference. First operand 261 states and 351 transitions. Second operand 16 states. [2020-10-14 05:25:17,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:17,987 INFO L93 Difference]: Finished difference Result 413 states and 600 transitions. [2020-10-14 05:25:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:25:17,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-14 05:25:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:17,991 INFO L225 Difference]: With dead ends: 413 [2020-10-14 05:25:17,991 INFO L226 Difference]: Without dead ends: 389 [2020-10-14 05:25:17,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:25:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-14 05:25:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 279. [2020-10-14 05:25:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 05:25:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 377 transitions. [2020-10-14 05:25:18,019 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 377 transitions. Word has length 27 [2020-10-14 05:25:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:18,019 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 377 transitions. [2020-10-14 05:25:18,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:25:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 377 transitions. [2020-10-14 05:25:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:18,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:18,021 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:18,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:25:18,021 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash 113008762, now seen corresponding path program 16 times [2020-10-14 05:25:18,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:18,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119220529] [2020-10-14 05:25:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:18,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:18,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-14 05:25:18,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:18,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:18,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:18,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:18,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:18,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:18,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:25:18,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119220529] [2020-10-14 05:25:18,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:18,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:18,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838918450] [2020-10-14 05:25:18,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:18,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:18,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:18,620 INFO L87 Difference]: Start difference. First operand 279 states and 377 transitions. Second operand 10 states. [2020-10-14 05:25:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:18,775 INFO L93 Difference]: Finished difference Result 305 states and 403 transitions. [2020-10-14 05:25:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:18,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:25:18,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:18,777 INFO L225 Difference]: With dead ends: 305 [2020-10-14 05:25:18,777 INFO L226 Difference]: Without dead ends: 257 [2020-10-14 05:25:18,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-14 05:25:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-10-14 05:25:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-14 05:25:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 346 transitions. [2020-10-14 05:25:18,806 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 346 transitions. Word has length 28 [2020-10-14 05:25:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:18,806 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 346 transitions. [2020-10-14 05:25:18,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 346 transitions. [2020-10-14 05:25:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:18,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:18,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:18,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:25:18,809 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2079985356, now seen corresponding path program 17 times [2020-10-14 05:25:18,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:18,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135115140] [2020-10-14 05:25:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:19,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:19,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:19,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-14 05:25:19,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:19,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:25:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:19,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:20,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:20,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:25:20,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135115140] [2020-10-14 05:25:20,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:20,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:25:20,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412411474] [2020-10-14 05:25:20,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:25:20,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:25:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:20,035 INFO L87 Difference]: Start difference. First operand 257 states and 346 transitions. Second operand 11 states. [2020-10-14 05:25:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:20,253 INFO L93 Difference]: Finished difference Result 306 states and 395 transitions. [2020-10-14 05:25:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:25:20,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:25:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:20,256 INFO L225 Difference]: With dead ends: 306 [2020-10-14 05:25:20,257 INFO L226 Difference]: Without dead ends: 292 [2020-10-14 05:25:20,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-14 05:25:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 257. [2020-10-14 05:25:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-14 05:25:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2020-10-14 05:25:20,285 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 28 [2020-10-14 05:25:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:20,285 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2020-10-14 05:25:20,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:25:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2020-10-14 05:25:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:20,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:20,287 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:20,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:25:20,287 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2012983750, now seen corresponding path program 18 times [2020-10-14 05:25:20,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:20,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95286280] [2020-10-14 05:25:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:21,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:21,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:25:21,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95286280] [2020-10-14 05:25:21,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:21,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:21,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104904241] [2020-10-14 05:25:21,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:21,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:21,509 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand 8 states. [2020-10-14 05:25:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:21,680 INFO L93 Difference]: Finished difference Result 290 states and 378 transitions. [2020-10-14 05:25:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:25:21,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 05:25:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:21,686 INFO L225 Difference]: With dead ends: 290 [2020-10-14 05:25:21,686 INFO L226 Difference]: Without dead ends: 247 [2020-10-14 05:25:21,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-14 05:25:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2020-10-14 05:25:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-14 05:25:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 323 transitions. [2020-10-14 05:25:21,706 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 323 transitions. Word has length 28 [2020-10-14 05:25:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:21,706 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 323 transitions. [2020-10-14 05:25:21,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 323 transitions. [2020-10-14 05:25:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:21,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:21,707 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:21,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:25:21,707 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1147416308, now seen corresponding path program 14 times [2020-10-14 05:25:21,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:21,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22650691] [2020-10-14 05:25:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:21,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:22,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:22,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:22,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-14 05:25:22,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:22,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:25:22,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:22,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:25:22,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:22,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:22,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:22,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:22,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:22,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:22,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:22,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:22,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:22,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22650691] [2020-10-14 05:25:22,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:22,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:25:22,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539569743] [2020-10-14 05:25:22,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:25:22,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:25:22,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:22,381 INFO L87 Difference]: Start difference. First operand 244 states and 323 transitions. Second operand 17 states. [2020-10-14 05:25:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:22,892 INFO L93 Difference]: Finished difference Result 391 states and 561 transitions. [2020-10-14 05:25:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:25:22,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-14 05:25:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:22,894 INFO L225 Difference]: With dead ends: 391 [2020-10-14 05:25:22,894 INFO L226 Difference]: Without dead ends: 365 [2020-10-14 05:25:22,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-14 05:25:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 261. [2020-10-14 05:25:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-14 05:25:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 347 transitions. [2020-10-14 05:25:22,922 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 347 transitions. Word has length 28 [2020-10-14 05:25:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:22,922 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 347 transitions. [2020-10-14 05:25:22,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:25:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 347 transitions. [2020-10-14 05:25:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:25:22,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:22,923 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:22,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:25:22,923 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:22,924 INFO L82 PathProgramCache]: Analyzing trace with hash -172419545, now seen corresponding path program 15 times [2020-10-14 05:25:22,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:22,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487354490] [2020-10-14 05:25:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:23,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:25:23,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:23,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-14 05:25:23,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:23,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:23,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:25:23,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:23,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:25:23,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:23,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:23,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:23,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:23,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:23,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:23,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:23,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:23,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:23,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:23,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:23,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487354490] [2020-10-14 05:25:23,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:23,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:25:23,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499375399] [2020-10-14 05:25:23,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:25:23,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:25:23,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:23,614 INFO L87 Difference]: Start difference. First operand 261 states and 347 transitions. Second operand 18 states. [2020-10-14 05:25:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:24,206 INFO L93 Difference]: Finished difference Result 414 states and 597 transitions. [2020-10-14 05:25:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:25:24,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-14 05:25:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:24,209 INFO L225 Difference]: With dead ends: 414 [2020-10-14 05:25:24,209 INFO L226 Difference]: Without dead ends: 388 [2020-10-14 05:25:24,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-14 05:25:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 278. [2020-10-14 05:25:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-14 05:25:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 371 transitions. [2020-10-14 05:25:24,239 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 371 transitions. Word has length 29 [2020-10-14 05:25:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:24,240 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 371 transitions. [2020-10-14 05:25:24,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:25:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 371 transitions. [2020-10-14 05:25:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:24,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:24,241 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:24,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:25:24,242 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1635256468, now seen corresponding path program 19 times [2020-10-14 05:25:24,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:24,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178146740] [2020-10-14 05:25:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:24,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:25,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:25:25,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:29,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:29,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:29,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:29,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:29,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:29,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:29,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:25:29,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178146740] [2020-10-14 05:25:29,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:29,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:25:29,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643817466] [2020-10-14 05:25:29,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:25:29,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:25:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=303, Unknown=1, NotChecked=0, Total=342 [2020-10-14 05:25:29,790 INFO L87 Difference]: Start difference. First operand 278 states and 371 transitions. Second operand 19 states. [2020-10-14 05:25:38,481 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 34 [2020-10-14 05:25:40,662 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-14 05:25:45,017 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-10-14 05:25:47,181 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-10-14 05:25:51,417 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-10-14 05:25:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:57,931 INFO L93 Difference]: Finished difference Result 337 states and 435 transitions. [2020-10-14 05:25:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:25:57,931 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-14 05:25:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:57,933 INFO L225 Difference]: With dead ends: 337 [2020-10-14 05:25:57,933 INFO L226 Difference]: Without dead ends: 322 [2020-10-14 05:25:57,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=82, Invalid=673, Unknown=1, NotChecked=0, Total=756 [2020-10-14 05:25:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-14 05:25:57,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 293. [2020-10-14 05:25:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-14 05:25:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 389 transitions. [2020-10-14 05:25:57,956 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 389 transitions. Word has length 30 [2020-10-14 05:25:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:57,956 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 389 transitions. [2020-10-14 05:25:57,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:25:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 389 transitions. [2020-10-14 05:25:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:57,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:57,957 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:57,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:25:57,958 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1565827596, now seen corresponding path program 20 times [2020-10-14 05:25:57,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:57,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530378726] [2020-10-14 05:25:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:57,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:02,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:02,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:26:02,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4753 [2020-10-14 05:26:02,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:02,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:26:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:26:02,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:26:02,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:02,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:02,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:02,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 05:26:02,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530378726] [2020-10-14 05:26:02,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:02,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:26:02,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040110573] [2020-10-14 05:26:02,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:26:02,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:02,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:26:02,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:02,881 INFO L87 Difference]: Start difference. First operand 293 states and 389 transitions. Second operand 11 states. [2020-10-14 05:26:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:03,111 INFO L93 Difference]: Finished difference Result 349 states and 470 transitions. [2020-10-14 05:26:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:26:03,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 05:26:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:03,113 INFO L225 Difference]: With dead ends: 349 [2020-10-14 05:26:03,114 INFO L226 Difference]: Without dead ends: 343 [2020-10-14 05:26:03,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-14 05:26:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 325. [2020-10-14 05:26:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-14 05:26:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 434 transitions. [2020-10-14 05:26:03,145 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 434 transitions. Word has length 30 [2020-10-14 05:26:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:03,146 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 434 transitions. [2020-10-14 05:26:03,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:26:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 434 transitions. [2020-10-14 05:26:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:26:03,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:03,147 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:03,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:26:03,148 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1879747484, now seen corresponding path program 21 times [2020-10-14 05:26:03,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:03,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394666802] [2020-10-14 05:26:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:03,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:04,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:26:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:05,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:05,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:05,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:05,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:05,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:05,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:05,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:05,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:05,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:05,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:05,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:26:05,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394666802] [2020-10-14 05:26:05,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:05,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:05,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917364157] [2020-10-14 05:26:05,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:05,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:05,136 INFO L87 Difference]: Start difference. First operand 325 states and 434 transitions. Second operand 12 states. [2020-10-14 05:26:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:05,439 INFO L93 Difference]: Finished difference Result 387 states and 496 transitions. [2020-10-14 05:26:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:26:05,439 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 05:26:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:05,442 INFO L225 Difference]: With dead ends: 387 [2020-10-14 05:26:05,442 INFO L226 Difference]: Without dead ends: 372 [2020-10-14 05:26:05,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:26:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-14 05:26:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 325. [2020-10-14 05:26:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-14 05:26:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 433 transitions. [2020-10-14 05:26:05,473 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 433 transitions. Word has length 30 [2020-10-14 05:26:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:05,474 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 433 transitions. [2020-10-14 05:26:05,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 433 transitions. [2020-10-14 05:26:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:26:05,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:05,475 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:05,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:26:05,475 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash -12290964, now seen corresponding path program 16 times [2020-10-14 05:26:05,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:05,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033864632] [2020-10-14 05:26:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:05,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:26:06,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:06,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:06,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:06,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:06,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033864632] [2020-10-14 05:26:06,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:06,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:26:06,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043391343] [2020-10-14 05:26:06,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:26:06,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:26:06,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:26:06,669 INFO L87 Difference]: Start difference. First operand 325 states and 433 transitions. Second operand 19 states. [2020-10-14 05:26:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:07,282 INFO L93 Difference]: Finished difference Result 506 states and 733 transitions. [2020-10-14 05:26:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:26:07,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-14 05:26:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:07,286 INFO L225 Difference]: With dead ends: 506 [2020-10-14 05:26:07,286 INFO L226 Difference]: Without dead ends: 478 [2020-10-14 05:26:07,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:26:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-14 05:26:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 344. [2020-10-14 05:26:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-14 05:26:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 460 transitions. [2020-10-14 05:26:07,320 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 460 transitions. Word has length 30 [2020-10-14 05:26:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:07,321 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 460 transitions. [2020-10-14 05:26:07,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:26:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 460 transitions. [2020-10-14 05:26:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:26:07,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:07,322 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:07,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:26:07,322 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:07,323 INFO L82 PathProgramCache]: Analyzing trace with hash -395320954, now seen corresponding path program 22 times [2020-10-14 05:26:07,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:07,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262494003] [2020-10-14 05:26:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:12,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:26:12,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:12,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:26:12,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:12,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:12,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:12,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:26:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:26:12,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:12,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:12,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:12,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:12,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:12,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:12,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:12,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:12,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:12,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:12,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:12,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 05:26:12,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262494003] [2020-10-14 05:26:12,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:12,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:12,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015233247] [2020-10-14 05:26:12,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:12,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:12,548 INFO L87 Difference]: Start difference. First operand 344 states and 460 transitions. Second operand 12 states. [2020-10-14 05:26:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:12,916 INFO L93 Difference]: Finished difference Result 403 states and 546 transitions. [2020-10-14 05:26:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:26:12,917 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-14 05:26:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:12,919 INFO L225 Difference]: With dead ends: 403 [2020-10-14 05:26:12,919 INFO L226 Difference]: Without dead ends: 397 [2020-10-14 05:26:12,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-14 05:26:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 378. [2020-10-14 05:26:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-14 05:26:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 508 transitions. [2020-10-14 05:26:12,954 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 508 transitions. Word has length 31 [2020-10-14 05:26:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:12,955 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 508 transitions. [2020-10-14 05:26:12,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:12,955 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 508 transitions. [2020-10-14 05:26:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:26:12,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:12,956 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:12,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:26:12,956 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash 656727751, now seen corresponding path program 17 times [2020-10-14 05:26:12,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:12,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349370600] [2020-10-14 05:26:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:13,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:26:13,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:13,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-14 05:26:13,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:13,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:26:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:26:13,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:13,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:13,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:13,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:13,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:13,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:13,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:13,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349370600] [2020-10-14 05:26:13,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:13,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:26:13,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513994378] [2020-10-14 05:26:13,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:26:13,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:13,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:26:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:26:13,792 INFO L87 Difference]: Start difference. First operand 378 states and 508 transitions. Second operand 20 states. [2020-10-14 05:26:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:14,476 INFO L93 Difference]: Finished difference Result 589 states and 862 transitions. [2020-10-14 05:26:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:26:14,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-14 05:26:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:14,481 INFO L225 Difference]: With dead ends: 589 [2020-10-14 05:26:14,481 INFO L226 Difference]: Without dead ends: 559 [2020-10-14 05:26:14,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:26:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-14 05:26:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 399. [2020-10-14 05:26:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-14 05:26:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 538 transitions. [2020-10-14 05:26:14,522 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 538 transitions. Word has length 31 [2020-10-14 05:26:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:14,522 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 538 transitions. [2020-10-14 05:26:14,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:26:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 538 transitions. [2020-10-14 05:26:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:14,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:14,524 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:14,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:26:14,524 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash 216131916, now seen corresponding path program 23 times [2020-10-14 05:26:14,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:14,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248820708] [2020-10-14 05:26:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:14,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:14,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:15,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:15,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:15,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-14 05:26:15,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:15,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:26:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:26:15,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:15,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:15,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:15,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:15,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:15,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:15,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:15,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:15,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:26:15,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248820708] [2020-10-14 05:26:15,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:15,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:15,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924617627] [2020-10-14 05:26:15,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:15,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:15,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:15,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:15,945 INFO L87 Difference]: Start difference. First operand 399 states and 538 transitions. Second operand 12 states. [2020-10-14 05:26:16,192 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-14 05:26:18,822 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-14 05:26:19,118 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-14 05:26:22,131 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-10-14 05:26:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:22,952 INFO L93 Difference]: Finished difference Result 876 states and 1030 transitions. [2020-10-14 05:26:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:26:22,952 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 05:26:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:22,956 INFO L225 Difference]: With dead ends: 876 [2020-10-14 05:26:22,956 INFO L226 Difference]: Without dead ends: 813 [2020-10-14 05:26:22,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:26:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-10-14 05:26:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 387. [2020-10-14 05:26:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-14 05:26:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 516 transitions. [2020-10-14 05:26:23,000 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 516 transitions. Word has length 32 [2020-10-14 05:26:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:23,001 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 516 transitions. [2020-10-14 05:26:23,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 516 transitions. [2020-10-14 05:26:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:23,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:23,002 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:23,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:26:23,002 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:23,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:23,003 INFO L82 PathProgramCache]: Analyzing trace with hash -892288646, now seen corresponding path program 24 times [2020-10-14 05:26:23,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:23,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102089664] [2020-10-14 05:26:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:23,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:24,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:24,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:24,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:26:24,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:24,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:24,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:24,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:24,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:26:24,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102089664] [2020-10-14 05:26:24,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:24,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:26:24,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229916663] [2020-10-14 05:26:24,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:26:24,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:24,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:26:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:26:24,753 INFO L87 Difference]: Start difference. First operand 387 states and 516 transitions. Second operand 13 states. [2020-10-14 05:26:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:25,028 INFO L93 Difference]: Finished difference Result 451 states and 580 transitions. [2020-10-14 05:26:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:26:25,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 05:26:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:25,030 INFO L225 Difference]: With dead ends: 451 [2020-10-14 05:26:25,030 INFO L226 Difference]: Without dead ends: 435 [2020-10-14 05:26:25,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:26:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-14 05:26:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 387. [2020-10-14 05:26:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-14 05:26:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 515 transitions. [2020-10-14 05:26:25,064 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 515 transitions. Word has length 32 [2020-10-14 05:26:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:25,065 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 515 transitions. [2020-10-14 05:26:25,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:26:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 515 transitions. [2020-10-14 05:26:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:25,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:25,066 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:25,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:26:25,066 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash -928044148, now seen corresponding path program 25 times [2020-10-14 05:26:25,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:25,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102413480] [2020-10-14 05:26:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:25,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:25,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:26,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:26,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:26,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-14 05:26:26,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:26,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:26:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:26:26,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:26,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:26,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:26,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:26,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:26,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:26,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:26,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:26:26,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102413480] [2020-10-14 05:26:26,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:26,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:26:26,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721780893] [2020-10-14 05:26:26,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:26:26,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:26,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:26:26,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:26:26,412 INFO L87 Difference]: Start difference. First operand 387 states and 515 transitions. Second operand 13 states. [2020-10-14 05:26:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:26,824 INFO L93 Difference]: Finished difference Result 464 states and 592 transitions. [2020-10-14 05:26:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:26:26,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 05:26:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:26,827 INFO L225 Difference]: With dead ends: 464 [2020-10-14 05:26:26,827 INFO L226 Difference]: Without dead ends: 448 [2020-10-14 05:26:26,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:26:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-14 05:26:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 387. [2020-10-14 05:26:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-14 05:26:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 514 transitions. [2020-10-14 05:26:26,867 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 514 transitions. Word has length 32 [2020-10-14 05:26:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:26,867 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 514 transitions. [2020-10-14 05:26:26,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:26:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 514 transitions. [2020-10-14 05:26:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:26,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:26,869 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:26,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:26:26,869 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -78528564, now seen corresponding path program 18 times [2020-10-14 05:26:26,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:26,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369306032] [2020-10-14 05:26:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:26,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:27,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:27,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:27,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:27,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:27,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-14 05:26:27,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:27,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:27,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:26:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:26:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:27,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:27,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:27,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:27,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:27,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:27,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:27,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:27,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:27,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:27,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:27,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:27,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:27,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369306032] [2020-10-14 05:26:27,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:27,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:26:27,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158407630] [2020-10-14 05:26:27,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:26:27,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:26:27,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:26:27,769 INFO L87 Difference]: Start difference. First operand 387 states and 514 transitions. Second operand 21 states. [2020-10-14 05:26:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:28,498 INFO L93 Difference]: Finished difference Result 606 states and 870 transitions. [2020-10-14 05:26:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:26:28,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-14 05:26:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:28,502 INFO L225 Difference]: With dead ends: 606 [2020-10-14 05:26:28,502 INFO L226 Difference]: Without dead ends: 576 [2020-10-14 05:26:28,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:26:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-10-14 05:26:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 408. [2020-10-14 05:26:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-14 05:26:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 544 transitions. [2020-10-14 05:26:28,550 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 544 transitions. Word has length 32 [2020-10-14 05:26:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:28,550 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 544 transitions. [2020-10-14 05:26:28,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:26:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 544 transitions. [2020-10-14 05:26:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:28,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:28,552 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:28,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:26:28,552 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1396637849, now seen corresponding path program 19 times [2020-10-14 05:26:28,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:28,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736393086] [2020-10-14 05:26:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:28,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:29,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:29,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:29,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-14 05:26:29,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:29,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:26:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:29,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:26:29,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:30,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:30,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:30,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:30,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:30,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:30,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:30,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:30,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:30,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736393086] [2020-10-14 05:26:30,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:30,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:26:30,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905197036] [2020-10-14 05:26:30,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:26:30,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:26:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:30,012 INFO L87 Difference]: Start difference. First operand 408 states and 544 transitions. Second operand 22 states. [2020-10-14 05:26:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:30,818 INFO L93 Difference]: Finished difference Result 635 states and 916 transitions. [2020-10-14 05:26:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:26:30,819 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-14 05:26:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:30,822 INFO L225 Difference]: With dead ends: 635 [2020-10-14 05:26:30,822 INFO L226 Difference]: Without dead ends: 605 [2020-10-14 05:26:30,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-14 05:26:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 429. [2020-10-14 05:26:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-14 05:26:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 574 transitions. [2020-10-14 05:26:30,878 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 574 transitions. Word has length 33 [2020-10-14 05:26:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:30,878 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 574 transitions. [2020-10-14 05:26:30,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:26:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 574 transitions. [2020-10-14 05:26:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:30,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:30,880 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:30,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:26:30,880 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:30,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1917292964, now seen corresponding path program 26 times [2020-10-14 05:26:30,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:30,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595921913] [2020-10-14 05:26:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:30,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:31,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:31,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-14 05:26:31,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:31,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:26:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:26:31,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:40,424 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-14 05:26:51,133 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-14 05:27:08,930 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-14 05:27:23,863 WARN L193 SmtUtils]: Spent 9.83 s on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-14 05:27:31,595 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-14 05:27:42,204 WARN L193 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-14 05:27:53,477 WARN L193 SmtUtils]: Spent 8.68 s on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-14 05:28:30,574 WARN L193 SmtUtils]: Spent 23.21 s on a formula simplification. DAG size of input: 84 DAG size of output: 65