/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:02:13,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:02:13,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:02:13,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:02:13,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:02:13,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:02:13,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:02:13,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:02:13,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:02:13,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:02:13,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:02:13,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:02:13,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:02:13,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:02:13,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:02:13,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:02:13,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:02:13,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:02:13,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:02:13,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:02:13,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:02:13,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:02:13,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:02:13,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:02:13,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:02:13,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:02:13,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:02:13,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:02:13,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:02:13,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:02:13,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:02:13,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:02:13,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:02:13,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:02:13,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:02:13,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:02:13,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:02:13,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:02:13,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:02:13,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:02:13,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:02:13,762 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 [2020-10-15 00:02:13,808 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:02:13,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:02:13,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:02:13,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:02:13,812 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:02:13,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:02:13,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:02:13,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:02:13,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:02:13,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:02:13,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:02:13,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:02:13,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:02:13,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:02:13,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:02:13,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:02:13,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:02:13,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:02:13,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:02:13,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:02:13,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:02:13,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:02:13,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:02:13,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:02:13,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:02:13,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:02:13,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:02:13,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:02:13,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:02:13,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:02:14,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:02:14,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:02:14,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:02:14,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:02:14,169 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:02:14,170 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-15 00:02:14,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed6d667f7/defe6b42eb1f4b188615d510c4cf91de/FLAG65d2e2936 [2020-10-15 00:02:14,724 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:02:14,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-15 00:02:14,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed6d667f7/defe6b42eb1f4b188615d510c4cf91de/FLAG65d2e2936 [2020-10-15 00:02:15,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed6d667f7/defe6b42eb1f4b188615d510c4cf91de [2020-10-15 00:02:15,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:02:15,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:02:15,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:02:15,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:02:15,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:02:15,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5514a342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15, skipping insertion in model container [2020-10-15 00:02:15,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:02:15,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:02:15,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:02:15,367 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:02:15,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:02:15,396 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:02:15,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15 WrapperNode [2020-10-15 00:02:15,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:02:15,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:02:15,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:02:15,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:02:15,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (1/1) ... [2020-10-15 00:02:15,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:02:15,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:02:15,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:02:15,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:02:15,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (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 [2020-10-15 00:02:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:02:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:02:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:02:15,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:02:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:02:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:02:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:02:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:02:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:02:15,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:02:15,807 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-15 00:02:15,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:15 BoogieIcfgContainer [2020-10-15 00:02:15,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:02:15,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:02:15,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:02:15,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:02:15,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:15" (1/3) ... [2020-10-15 00:02:15,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dc9365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:15, skipping insertion in model container [2020-10-15 00:02:15,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:15" (2/3) ... [2020-10-15 00:02:15,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dc9365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:15, skipping insertion in model container [2020-10-15 00:02:15,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:15" (3/3) ... [2020-10-15 00:02:15,820 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2020-10-15 00:02:15,833 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:02:15,840 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:02:15,861 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:02:15,941 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:02:15,941 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:02:15,941 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:02:15,942 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:02:15,942 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:02:15,942 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:02:15,942 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:02:15,942 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:02:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-15 00:02:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 00:02:15,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:15,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:15,980 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash 670812305, now seen corresponding path program 1 times [2020-10-15 00:02:15,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:15,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925671427] [2020-10-15 00:02:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-15 00:02:16,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:16,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-15 00:02:16,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:02:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:02:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-15 00:02:16,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:16,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:16,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:02:16,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:16,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:16,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:16,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:16,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925671427] [2020-10-15 00:02:16,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:02:16,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:02:16,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657426558] [2020-10-15 00:02:16,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:02:16,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:02:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:02:16,484 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-15 00:02:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:16,572 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2020-10-15 00:02:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:02:16,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-15 00:02:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:16,586 INFO L225 Difference]: With dead ends: 45 [2020-10-15 00:02:16,586 INFO L226 Difference]: Without dead ends: 23 [2020-10-15 00:02:16,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-15 00:02:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-15 00:02:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-15 00:02:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-15 00:02:16,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2020-10-15 00:02:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:16,643 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-15 00:02:16,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:02:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-15 00:02:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 00:02:16,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:16,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:16,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:02:16,647 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1044659607, now seen corresponding path program 1 times [2020-10-15 00:02:16,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:16,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926728762] [2020-10-15 00:02:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:02:16,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-15 00:02:16,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:02:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:02:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:16,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:16,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:02:16,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:16,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:16,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926728762] [2020-10-15 00:02:16,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:16,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:02:16,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204378825] [2020-10-15 00:02:16,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:02:16,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:16,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:02:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:02:16,888 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-10-15 00:02:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:16,906 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-15 00:02:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:02:16,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-15 00:02:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:16,908 INFO L225 Difference]: With dead ends: 31 [2020-10-15 00:02:16,908 INFO L226 Difference]: Without dead ends: 18 [2020-10-15 00:02:16,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:02:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-15 00:02:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-15 00:02:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 00:02:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-15 00:02:16,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-10-15 00:02:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:16,916 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-15 00:02:16,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:02:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-15 00:02:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:02:16,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:16,917 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:16,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:02:16,918 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:16,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2009904791, now seen corresponding path program 2 times [2020-10-15 00:02:16,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:16,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494094651] [2020-10-15 00:02:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:02:17,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:17,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-15 00:02:17,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:02:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:02:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:17,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:17,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:17,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:02:17,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:17,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:17,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:17,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:17,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494094651] [2020-10-15 00:02:17,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:17,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:02:17,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245586605] [2020-10-15 00:02:17,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:02:17,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:02:17,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:02:17,228 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 7 states. [2020-10-15 00:02:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:17,290 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-15 00:02:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:02:17,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-15 00:02:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:17,292 INFO L225 Difference]: With dead ends: 27 [2020-10-15 00:02:17,292 INFO L226 Difference]: Without dead ends: 25 [2020-10-15 00:02:17,293 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 [2020-10-15 00:02:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-15 00:02:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-15 00:02:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 00:02:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-15 00:02:17,300 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2020-10-15 00:02:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:17,301 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-15 00:02:17,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:02:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-15 00:02:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 00:02:17,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:17,302 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:17,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:02:17,302 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:17,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2082846679, now seen corresponding path program 3 times [2020-10-15 00:02:17,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:17,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624589102] [2020-10-15 00:02:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-15 00:02:17,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:17,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-15 00:02:17,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:02:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:02:17,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:02:17,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:17,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:17,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:17,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:17,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624589102] [2020-10-15 00:02:17,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:17,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:02:17,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963821221] [2020-10-15 00:02:17,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:02:17,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:17,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:02:17,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:17,510 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-10-15 00:02:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:17,532 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-15 00:02:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:02:17,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-15 00:02:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:17,533 INFO L225 Difference]: With dead ends: 33 [2020-10-15 00:02:17,533 INFO L226 Difference]: Without dead ends: 20 [2020-10-15 00:02:17,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-15 00:02:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-15 00:02:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 00:02:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-15 00:02:17,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-10-15 00:02:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:17,540 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-15 00:02:17,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:02:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-15 00:02:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 00:02:17,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:17,541 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:17,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:02:17,542 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:17,542 INFO L82 PathProgramCache]: Analyzing trace with hash -109123369, now seen corresponding path program 4 times [2020-10-15 00:02:17,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:17,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26404123] [2020-10-15 00:02:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-15 00:02:17,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:17,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-15 00:02:17,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:02:17,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:17,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:02:17,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:18,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:18,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:18,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:18,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:18,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26404123] [2020-10-15 00:02:18,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:18,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:02:18,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338948384] [2020-10-15 00:02:18,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:02:18,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:02:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:02:18,135 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 9 states. [2020-10-15 00:02:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:18,242 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-15 00:02:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:02:18,243 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-15 00:02:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:18,244 INFO L225 Difference]: With dead ends: 29 [2020-10-15 00:02:18,245 INFO L226 Difference]: Without dead ends: 27 [2020-10-15 00:02:18,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-15 00:02:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-15 00:02:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:02:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-15 00:02:18,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2020-10-15 00:02:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:18,254 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-15 00:02:18,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:02:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-15 00:02:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:02:18,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:18,256 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:18,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:02:18,257 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash 946757097, now seen corresponding path program 5 times [2020-10-15 00:02:18,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:18,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944052210] [2020-10-15 00:02:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:02:18,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:18,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-15 00:02:18,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:02:18,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:18,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:02:18,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:18,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:18,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:18,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:18,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:18,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:18,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:18,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944052210] [2020-10-15 00:02:18,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:18,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:02:18,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374636599] [2020-10-15 00:02:18,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:02:18,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:02:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:18,490 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-10-15 00:02:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:18,518 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-15 00:02:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:02:18,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-15 00:02:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:18,521 INFO L225 Difference]: With dead ends: 41 [2020-10-15 00:02:18,522 INFO L226 Difference]: Without dead ends: 28 [2020-10-15 00:02:18,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-15 00:02:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-15 00:02:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 00:02:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-15 00:02:18,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-10-15 00:02:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:18,529 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-15 00:02:18,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:02:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-15 00:02:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:02:18,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:18,531 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:18,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:02:18,531 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 408159145, now seen corresponding path program 6 times [2020-10-15 00:02:18,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:18,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456512046] [2020-10-15 00:02:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:02:18,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:18,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-15 00:02:18,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:02:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:02:18,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:18,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:18,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:18,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:18,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:18,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:18,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:18,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456512046] [2020-10-15 00:02:18,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:18,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:02:18,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984752132] [2020-10-15 00:02:18,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:02:18,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:02:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:18,807 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 10 states. [2020-10-15 00:02:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:18,837 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-15 00:02:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:02:18,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-15 00:02:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:18,839 INFO L225 Difference]: With dead ends: 43 [2020-10-15 00:02:18,839 INFO L226 Difference]: Without dead ends: 30 [2020-10-15 00:02:18,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-15 00:02:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-15 00:02:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 00:02:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-15 00:02:18,850 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-15 00:02:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:18,850 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-15 00:02:18,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:02:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-15 00:02:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:02:18,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:18,853 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:18,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:02:18,853 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:18,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1788397207, now seen corresponding path program 7 times [2020-10-15 00:02:18,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:18,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450491388] [2020-10-15 00:02:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:19,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:02:19,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:19,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-15 00:02:19,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:19,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:02:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:02:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:19,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:19,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:19,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:19,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:19,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:19,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:19,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:19,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450491388] [2020-10-15 00:02:19,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:19,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:02:19,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166011279] [2020-10-15 00:02:19,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:02:19,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:02:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:02:19,223 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2020-10-15 00:02:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:19,269 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-15 00:02:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:02:19,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-15 00:02:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:19,271 INFO L225 Difference]: With dead ends: 45 [2020-10-15 00:02:19,271 INFO L226 Difference]: Without dead ends: 32 [2020-10-15 00:02:19,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:02:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-15 00:02:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-15 00:02:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 00:02:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-15 00:02:19,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2020-10-15 00:02:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:19,279 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-15 00:02:19,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:02:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-15 00:02:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:02:19,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:19,280 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:19,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:02:19,280 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash 444858153, now seen corresponding path program 8 times [2020-10-15 00:02:19,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:19,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815966433] [2020-10-15 00:02:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:19,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:02:19,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:19,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-15 00:02:19,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:19,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:02:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:19,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:02:19,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:19,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:19,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:19,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:19,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:19,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:19,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:19,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:19,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:19,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:19,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:19,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815966433] [2020-10-15 00:02:19,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:19,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:02:19,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142268775] [2020-10-15 00:02:19,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:02:19,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:19,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:02:19,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:02:19,745 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 14 states. [2020-10-15 00:02:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:19,780 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-15 00:02:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:02:19,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-15 00:02:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:19,782 INFO L225 Difference]: With dead ends: 47 [2020-10-15 00:02:19,782 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:02:19,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:02:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:02:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-15 00:02:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 00:02:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-15 00:02:19,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-15 00:02:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:19,788 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-15 00:02:19,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:02:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-15 00:02:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:02:19,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:19,790 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:19,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:02:19,790 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:19,791 INFO L82 PathProgramCache]: Analyzing trace with hash -880388887, now seen corresponding path program 9 times [2020-10-15 00:02:19,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:19,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240841082] [2020-10-15 00:02:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:02:20,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:20,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-15 00:02:20,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:02:20,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:20,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:02:20,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:20,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:20,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:20,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:20,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:20,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240841082] [2020-10-15 00:02:20,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:20,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:02:20,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690136297] [2020-10-15 00:02:20,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:02:20,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:02:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:02:20,324 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 16 states. [2020-10-15 00:02:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:20,361 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-15 00:02:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:02:20,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-15 00:02:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:20,362 INFO L225 Difference]: With dead ends: 49 [2020-10-15 00:02:20,363 INFO L226 Difference]: Without dead ends: 36 [2020-10-15 00:02:20,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:02:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-15 00:02:20,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-15 00:02:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 00:02:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-15 00:02:20,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-15 00:02:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:20,369 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-15 00:02:20,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:02:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-15 00:02:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:02:20,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:20,370 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:20,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:02:20,371 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:20,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1162492585, now seen corresponding path program 10 times [2020-10-15 00:02:20,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:20,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236998483] [2020-10-15 00:02:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:02:20,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:20,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-15 00:02:20,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:02:20,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:20,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:02:20,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:20,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:20,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:20,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236998483] [2020-10-15 00:02:20,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:20,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:02:20,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531909701] [2020-10-15 00:02:20,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:02:20,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:02:20,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:21,000 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 18 states. [2020-10-15 00:02:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:21,037 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-15 00:02:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:02:21,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-15 00:02:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:21,039 INFO L225 Difference]: With dead ends: 51 [2020-10-15 00:02:21,039 INFO L226 Difference]: Without dead ends: 38 [2020-10-15 00:02:21,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-15 00:02:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-15 00:02:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 00:02:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-15 00:02:21,045 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2020-10-15 00:02:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:21,045 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-15 00:02:21,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:02:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-15 00:02:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:02:21,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:21,047 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:21,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:02:21,047 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1571532905, now seen corresponding path program 11 times [2020-10-15 00:02:21,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:21,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233750851] [2020-10-15 00:02:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:21,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:21,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:02:21,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:21,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-15 00:02:21,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:21,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:21,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:02:21,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:21,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:02:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:21,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:22,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:22,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:22,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:22,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:22,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:22,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:22,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:22,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233750851] [2020-10-15 00:02:22,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:22,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:02:22,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920975017] [2020-10-15 00:02:22,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:02:22,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:02:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:02:22,009 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 20 states. [2020-10-15 00:02:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:22,052 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-15 00:02:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:02:22,052 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-15 00:02:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:22,053 INFO L225 Difference]: With dead ends: 53 [2020-10-15 00:02:22,054 INFO L226 Difference]: Without dead ends: 40 [2020-10-15 00:02:22,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:02:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-15 00:02:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-15 00:02:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 00:02:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-15 00:02:22,061 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 28 [2020-10-15 00:02:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:22,061 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-15 00:02:22,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:02:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-15 00:02:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:02:22,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:22,062 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:22,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:02:22,063 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash -477710807, now seen corresponding path program 12 times [2020-10-15 00:02:22,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:22,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939504840] [2020-10-15 00:02:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:22,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:22,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:22,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:22,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:02:22,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:22,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-15 00:02:22,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:22,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:22,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:02:22,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:22,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:02:22,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:23,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:23,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:23,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:23,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:23,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:23,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:23,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939504840] [2020-10-15 00:02:23,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:23,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:02:23,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601760084] [2020-10-15 00:02:23,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:02:23,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:23,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:02:23,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:02:23,176 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 22 states. [2020-10-15 00:02:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:23,224 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-15 00:02:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:02:23,225 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-15 00:02:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:23,226 INFO L225 Difference]: With dead ends: 55 [2020-10-15 00:02:23,226 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 00:02:23,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:02:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 00:02:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 00:02:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 00:02:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-15 00:02:23,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 30 [2020-10-15 00:02:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:23,233 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-15 00:02:23,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:02:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-15 00:02:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:02:23,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:23,235 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:23,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:02:23,235 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1589070825, now seen corresponding path program 13 times [2020-10-15 00:02:23,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:23,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109913878] [2020-10-15 00:02:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:23,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:02:23,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:23,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-15 00:02:23,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:23,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:23,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:02:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:02:23,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:24,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:24,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:24,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:24,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:24,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:24,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:24,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:24,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:24,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:24,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:24,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:24,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109913878] [2020-10-15 00:02:24,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:24,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:02:24,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597686270] [2020-10-15 00:02:24,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:02:24,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:24,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:02:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:02:24,288 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 24 states. [2020-10-15 00:02:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:24,339 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-15 00:02:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:02:24,340 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-15 00:02:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:24,341 INFO L225 Difference]: With dead ends: 57 [2020-10-15 00:02:24,341 INFO L226 Difference]: Without dead ends: 44 [2020-10-15 00:02:24,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:02:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-15 00:02:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-15 00:02:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 00:02:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-15 00:02:24,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 32 [2020-10-15 00:02:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:24,348 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-15 00:02:24,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:02:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-15 00:02:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:02:24,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:24,349 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:24,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:02:24,350 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash -803638871, now seen corresponding path program 14 times [2020-10-15 00:02:24,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:24,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455589606] [2020-10-15 00:02:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:24,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:25,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:02:25,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:25,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-15 00:02:25,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:25,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:02:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:02:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:25,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:25,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:25,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:25,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:25,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:25,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:25,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:25,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:25,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:25,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:25,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:25,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455589606] [2020-10-15 00:02:25,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:25,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:02:25,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516567090] [2020-10-15 00:02:25,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:02:25,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:25,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:02:25,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:02:25,644 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 26 states. [2020-10-15 00:02:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:25,685 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-15 00:02:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:02:25,686 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:02:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:25,687 INFO L225 Difference]: With dead ends: 59 [2020-10-15 00:02:25,687 INFO L226 Difference]: Without dead ends: 46 [2020-10-15 00:02:25,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:02:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-15 00:02:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-15 00:02:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 00:02:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-15 00:02:25,693 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-10-15 00:02:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:25,693 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-15 00:02:25,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:02:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-15 00:02:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:02:25,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:25,695 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:25,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:02:25,695 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:25,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1904813929, now seen corresponding path program 15 times [2020-10-15 00:02:25,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:25,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105465072] [2020-10-15 00:02:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:25,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:26,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:26,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:02:26,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:26,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-15 00:02:26,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:26,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:02:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:02:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:27,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:27,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:27,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:27,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:27,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:27,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:27,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:27,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:27,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:27,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105465072] [2020-10-15 00:02:27,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:27,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:02:27,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209988037] [2020-10-15 00:02:27,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:02:27,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:27,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:02:27,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:02:27,022 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 28 states. [2020-10-15 00:02:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:27,069 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-15 00:02:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:02:27,069 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-15 00:02:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:27,071 INFO L225 Difference]: With dead ends: 61 [2020-10-15 00:02:27,071 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 00:02:27,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:02:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 00:02:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-15 00:02:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 00:02:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-15 00:02:27,077 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2020-10-15 00:02:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:27,077 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-15 00:02:27,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:02:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-15 00:02:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:02:27,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:27,078 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:27,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:02:27,079 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1977773353, now seen corresponding path program 16 times [2020-10-15 00:02:27,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:27,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844524603] [2020-10-15 00:02:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:27,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:27,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:28,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:02:28,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:28,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-15 00:02:28,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:28,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:02:28,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:28,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:02:28,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:28,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:28,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:28,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:28,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:28,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:28,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:28,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844524603] [2020-10-15 00:02:28,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:28,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:02:28,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077197792] [2020-10-15 00:02:28,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:02:28,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:02:28,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:02:28,577 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 30 states. [2020-10-15 00:02:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:28,630 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-15 00:02:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:02:28,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-15 00:02:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:28,632 INFO L225 Difference]: With dead ends: 63 [2020-10-15 00:02:28,632 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 00:02:28,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:02:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 00:02:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-15 00:02:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 00:02:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-15 00:02:28,637 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 38 [2020-10-15 00:02:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:28,638 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-15 00:02:28,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:02:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-15 00:02:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:02:28,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:28,639 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:28,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:02:28,639 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:28,640 INFO L82 PathProgramCache]: Analyzing trace with hash -922664215, now seen corresponding path program 17 times [2020-10-15 00:02:28,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:28,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242824017] [2020-10-15 00:02:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:29,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:02:29,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:29,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-15 00:02:29,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:29,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:29,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:02:29,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:29,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:02:29,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:30,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:30,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:30,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:30,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:30,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:30,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:30,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:30,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242824017] [2020-10-15 00:02:30,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:30,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:02:30,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854581129] [2020-10-15 00:02:30,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:02:30,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:30,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:02:30,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:02:30,297 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 32 states. [2020-10-15 00:02:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:30,362 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-15 00:02:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:02:30,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-15 00:02:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:30,363 INFO L225 Difference]: With dead ends: 65 [2020-10-15 00:02:30,363 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 00:02:30,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:02:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 00:02:30,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-15 00:02:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 00:02:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-15 00:02:30,369 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2020-10-15 00:02:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:30,369 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-15 00:02:30,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:02:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-15 00:02:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:02:30,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:30,371 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:30,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:02:30,371 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash -809391959, now seen corresponding path program 18 times [2020-10-15 00:02:30,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:30,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829936696] [2020-10-15 00:02:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:30,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:31,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:31,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:02:31,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:31,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-15 00:02:31,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:31,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:31,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:02:31,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:31,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:02:31,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:32,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:32,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:32,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:32,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:32,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:32,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:32,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:32,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:32,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:32,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829936696] [2020-10-15 00:02:32,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:32,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:02:32,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675859797] [2020-10-15 00:02:32,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:02:32,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:02:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:02:32,062 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 34 states. [2020-10-15 00:02:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:32,112 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-15 00:02:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:02:32,114 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-15 00:02:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:32,115 INFO L225 Difference]: With dead ends: 67 [2020-10-15 00:02:32,115 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 00:02:32,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:02:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 00:02:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-15 00:02:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 00:02:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-15 00:02:32,129 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 42 [2020-10-15 00:02:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:32,130 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-15 00:02:32,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:02:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-15 00:02:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:02:32,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:32,131 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:32,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:02:32,131 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash 671063657, now seen corresponding path program 19 times [2020-10-15 00:02:32,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:32,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845908410] [2020-10-15 00:02:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:32,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:32,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:33,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:33,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:02:33,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-15 00:02:33,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:33,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:02:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:02:33,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:34,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:34,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:34,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:34,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:34,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:34,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:34,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:34,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:34,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845908410] [2020-10-15 00:02:34,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:34,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:02:34,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043189323] [2020-10-15 00:02:34,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:02:34,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:34,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:02:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:02:34,417 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 36 states. [2020-10-15 00:02:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:34,515 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-10-15 00:02:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:02:34,516 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-15 00:02:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:34,517 INFO L225 Difference]: With dead ends: 69 [2020-10-15 00:02:34,518 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 00:02:34,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:02:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 00:02:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-15 00:02:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 00:02:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-15 00:02:34,531 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 44 [2020-10-15 00:02:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:34,532 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-15 00:02:34,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:02:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-15 00:02:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:02:34,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:34,534 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:34,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:02:34,534 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1754735657, now seen corresponding path program 20 times [2020-10-15 00:02:34,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:34,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627383183] [2020-10-15 00:02:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:34,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:36,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:36,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:02:36,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:36,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1540 [2020-10-15 00:02:36,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:36,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:36,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:02:36,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:02:36,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:36,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:36,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:36,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:36,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:36,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:36,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:36,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:36,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:36,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627383183] [2020-10-15 00:02:36,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:36,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:02:36,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924488950] [2020-10-15 00:02:36,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:02:36,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:36,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:02:36,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:02:36,854 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 38 states. [2020-10-15 00:02:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:36,916 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-10-15 00:02:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:02:36,916 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-15 00:02:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:36,917 INFO L225 Difference]: With dead ends: 71 [2020-10-15 00:02:36,918 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 00:02:36,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:02:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 00:02:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-15 00:02:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:02:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-15 00:02:36,923 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2020-10-15 00:02:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:36,923 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-15 00:02:36,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:02:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-15 00:02:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:02:36,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:36,924 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:36,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:02:36,924 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:36,925 INFO L82 PathProgramCache]: Analyzing trace with hash -513525271, now seen corresponding path program 21 times [2020-10-15 00:02:36,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:36,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37469929] [2020-10-15 00:02:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:36,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:38,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:38,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:02:38,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:38,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1492 [2020-10-15 00:02:38,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:38,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:38,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:02:38,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:38,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:02:38,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:39,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:39,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:39,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:39,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:39,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:39,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:39,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:39,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:39,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:39,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:39,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37469929] [2020-10-15 00:02:39,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:39,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:02:39,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380879051] [2020-10-15 00:02:39,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:02:39,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:39,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:02:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:02:39,273 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 40 states. [2020-10-15 00:02:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:39,344 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-15 00:02:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:02:39,346 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-15 00:02:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:39,347 INFO L225 Difference]: With dead ends: 73 [2020-10-15 00:02:39,347 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 00:02:39,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:02:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 00:02:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-15 00:02:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 00:02:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-15 00:02:39,355 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 48 [2020-10-15 00:02:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:39,355 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-15 00:02:39,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:02:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-15 00:02:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:02:39,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:39,356 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:39,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:02:39,358 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1531109289, now seen corresponding path program 22 times [2020-10-15 00:02:39,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:39,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852019007] [2020-10-15 00:02:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:39,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:39,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:40,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:40,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:02:40,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:40,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1427 [2020-10-15 00:02:40,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:40,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:02:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:02:40,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:41,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:41,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:41,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:41,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:41,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:41,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:41,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:41,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:41,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852019007] [2020-10-15 00:02:41,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:41,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:02:41,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137354585] [2020-10-15 00:02:41,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:02:41,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:02:41,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:02:41,732 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 42 states. [2020-10-15 00:02:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:41,809 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-10-15 00:02:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:02:41,812 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-15 00:02:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:41,813 INFO L225 Difference]: With dead ends: 75 [2020-10-15 00:02:41,813 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:02:41,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:02:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:02:41,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-15 00:02:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 00:02:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-15 00:02:41,819 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 50 [2020-10-15 00:02:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:41,820 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-15 00:02:41,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:02:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-15 00:02:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:02:41,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:41,821 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:41,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:02:41,822 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash -670100119, now seen corresponding path program 23 times [2020-10-15 00:02:41,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:41,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246878620] [2020-10-15 00:02:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:41,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:43,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:43,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:02:43,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:43,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1344 [2020-10-15 00:02:43,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:43,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:02:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 00:02:43,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:44,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:44,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:44,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:44,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:44,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:44,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246878620] [2020-10-15 00:02:44,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:44,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:02:44,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611925131] [2020-10-15 00:02:44,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:02:44,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:02:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:02:44,193 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 44 states. [2020-10-15 00:02:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:44,276 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-10-15 00:02:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:02:44,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-15 00:02:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:44,278 INFO L225 Difference]: With dead ends: 77 [2020-10-15 00:02:44,278 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:02:44,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:02:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:02:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-15 00:02:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 00:02:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-15 00:02:44,285 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 52 [2020-10-15 00:02:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:44,285 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-15 00:02:44,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:02:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-15 00:02:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:02:44,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:44,286 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:44,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:02:44,287 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:44,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:44,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535721, now seen corresponding path program 24 times [2020-10-15 00:02:44,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:44,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421608601] [2020-10-15 00:02:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:44,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:45,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:45,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:02:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-15 00:02:45,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:45,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:02:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:02:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:46,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:46,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:46,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:46,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421608601] [2020-10-15 00:02:46,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:46,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:02:46,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342717196] [2020-10-15 00:02:46,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:02:46,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:02:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:02:46,939 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 46 states. [2020-10-15 00:02:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:47,031 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-10-15 00:02:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:02:47,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-15 00:02:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:47,032 INFO L225 Difference]: With dead ends: 79 [2020-10-15 00:02:47,033 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:02:47,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:02:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:02:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-15 00:02:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 00:02:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-15 00:02:47,037 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2020-10-15 00:02:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:47,038 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-15 00:02:47,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:02:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-15 00:02:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:02:47,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:47,038 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:47,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:02:47,039 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:47,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2128621801, now seen corresponding path program 25 times [2020-10-15 00:02:47,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:47,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351746684] [2020-10-15 00:02:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:47,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:47,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:48,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:48,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:02:48,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-10-15 00:02:48,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:48,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:02:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 00:02:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:50,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:50,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:50,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:50,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:50,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351746684] [2020-10-15 00:02:50,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:50,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:02:50,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103804689] [2020-10-15 00:02:50,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:02:50,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:02:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:02:50,085 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 48 states. [2020-10-15 00:02:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:50,146 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-10-15 00:02:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:02:50,147 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-15 00:02:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:50,148 INFO L225 Difference]: With dead ends: 81 [2020-10-15 00:02:50,148 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 00:02:50,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:02:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 00:02:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-15 00:02:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 00:02:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-15 00:02:50,153 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 56 [2020-10-15 00:02:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:50,153 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-15 00:02:50,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:02:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-15 00:02:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:02:50,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:50,154 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:50,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:02:50,154 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1986193751, now seen corresponding path program 26 times [2020-10-15 00:02:50,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:50,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600395945] [2020-10-15 00:02:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:50,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:50,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:51,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:02:51,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:51,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1649 [2020-10-15 00:02:51,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:51,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:51,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:02:51,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:51,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:02:51,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:53,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:53,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:53,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:53,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:53,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:53,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600395945] [2020-10-15 00:02:53,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:53,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:02:53,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235868808] [2020-10-15 00:02:53,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:02:53,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:53,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:02:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:02:53,106 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 50 states. [2020-10-15 00:02:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:53,221 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-10-15 00:02:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:02:53,222 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-15 00:02:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:53,224 INFO L225 Difference]: With dead ends: 83 [2020-10-15 00:02:53,225 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 00:02:53,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:02:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 00:02:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-15 00:02:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 00:02:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-15 00:02:53,233 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 58 [2020-10-15 00:02:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:53,233 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-15 00:02:53,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:02:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-15 00:02:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:02:53,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:53,235 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:53,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:02:53,236 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash -659059607, now seen corresponding path program 27 times [2020-10-15 00:02:53,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:53,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497255881] [2020-10-15 00:02:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:02:54,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:54,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-15 00:02:54,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:54,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:54,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:02:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:02:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:56,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:56,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:56,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:56,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:02:56,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:56,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:56,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:56,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497255881] [2020-10-15 00:02:56,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:56,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:02:56,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702617482] [2020-10-15 00:02:56,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:02:56,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:02:56,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:02:56,404 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 52 states. [2020-10-15 00:02:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:56,520 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2020-10-15 00:02:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:02:56,521 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-15 00:02:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:56,522 INFO L225 Difference]: With dead ends: 85 [2020-10-15 00:02:56,522 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 00:02:56,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:02:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 00:02:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-15 00:02:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 00:02:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-15 00:02:56,527 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 60 [2020-10-15 00:02:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:56,527 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-15 00:02:56,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:02:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-15 00:02:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:02:56,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:56,528 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:56,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:02:56,528 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash -888434135, now seen corresponding path program 28 times [2020-10-15 00:02:56,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:56,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190995743] [2020-10-15 00:02:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:56,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:58,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:58,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:02:58,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:58,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-15 00:02:58,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:58,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:58,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:02:58,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:58,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 00:02:58,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:59,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:59,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:59,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:59,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:59,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:59,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:59,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:59,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:59,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190995743] [2020-10-15 00:02:59,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:59,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:02:59,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972624960] [2020-10-15 00:02:59,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:02:59,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:02:59,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:02:59,642 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 54 states. [2020-10-15 00:02:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:59,751 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-15 00:02:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:02:59,754 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 62 [2020-10-15 00:02:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:59,754 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:02:59,755 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 00:02:59,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:02:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 00:02:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-15 00:02:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 00:02:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-15 00:02:59,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 62 [2020-10-15 00:02:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:59,762 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-15 00:02:59,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:02:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-15 00:02:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:02:59,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:59,763 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:59,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:02:59,763 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:59,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2020943849, now seen corresponding path program 29 times [2020-10-15 00:02:59,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:59,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044180599] [2020-10-15 00:02:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:01,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:01,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:03:01,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:01,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-15 00:03:01,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:01,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:03:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:03:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:02,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:02,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:02,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:02,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:02,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:02,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:02,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:02,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:02,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:02,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:02,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044180599] [2020-10-15 00:03:02,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:02,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:03:02,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617394021] [2020-10-15 00:03:02,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:03:02,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:03:02,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:03:02,908 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 56 states. [2020-10-15 00:03:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:03,029 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-15 00:03:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:03:03,029 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2020-10-15 00:03:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:03,030 INFO L225 Difference]: With dead ends: 89 [2020-10-15 00:03:03,031 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 00:03:03,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:03:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 00:03:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-15 00:03:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 00:03:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-15 00:03:03,037 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 64 [2020-10-15 00:03:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:03,037 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-15 00:03:03,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:03:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-15 00:03:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:03:03,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:03,038 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:03,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:03:03,038 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1909476777, now seen corresponding path program 30 times [2020-10-15 00:03:03,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:03,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346340338] [2020-10-15 00:03:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:03,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:04,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:04,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:03:04,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:04,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1849 [2020-10-15 00:03:04,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:04,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:03:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 00:03:04,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:06,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:06,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:06,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:06,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:06,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:06,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:06,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:06,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:06,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:06,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:06,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:06,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346340338] [2020-10-15 00:03:06,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:06,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:03:06,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992597203] [2020-10-15 00:03:06,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:03:06,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:03:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:03:06,643 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 58 states. [2020-10-15 00:03:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:06,754 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-10-15 00:03:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:03:06,755 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 66 [2020-10-15 00:03:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:06,756 INFO L225 Difference]: With dead ends: 91 [2020-10-15 00:03:06,756 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 00:03:06,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:03:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 00:03:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-15 00:03:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 00:03:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-15 00:03:06,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 66 [2020-10-15 00:03:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:06,761 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-15 00:03:06,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:03:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-15 00:03:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:03:06,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:06,762 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:06,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:03:06,763 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2131164311, now seen corresponding path program 31 times [2020-10-15 00:03:06,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:06,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908648875] [2020-10-15 00:03:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:06,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:08,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:03:08,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:08,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-10-15 00:03:08,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:08,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:03:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 00:03:08,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:10,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:10,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:10,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:10,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908648875] [2020-10-15 00:03:10,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:10,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-15 00:03:10,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290537677] [2020-10-15 00:03:10,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-15 00:03:10,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-15 00:03:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:03:10,622 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 60 states. [2020-10-15 00:03:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:10,726 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-10-15 00:03:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 00:03:10,727 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 68 [2020-10-15 00:03:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:10,728 INFO L225 Difference]: With dead ends: 93 [2020-10-15 00:03:10,728 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 00:03:10,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:03:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 00:03:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-15 00:03:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 00:03:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-15 00:03:10,732 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2020-10-15 00:03:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:10,733 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-15 00:03:10,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-15 00:03:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-15 00:03:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:03:10,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:10,734 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:10,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:03:10,734 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1758153001, now seen corresponding path program 32 times [2020-10-15 00:03:10,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:10,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896438326] [2020-10-15 00:03:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:12,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:12,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:03:12,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:12,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1983 [2020-10-15 00:03:12,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:12,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:12,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-15 00:03:12,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:12,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 00:03:12,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:14,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:14,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:14,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:14,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:14,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:14,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:14,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:14,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:14,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:14,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896438326] [2020-10-15 00:03:14,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:14,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-15 00:03:14,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079315409] [2020-10-15 00:03:14,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-15 00:03:14,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:14,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-15 00:03:14,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:03:14,731 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 62 states. [2020-10-15 00:03:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:14,856 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-10-15 00:03:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-15 00:03:14,858 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 70 [2020-10-15 00:03:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:14,859 INFO L225 Difference]: With dead ends: 95 [2020-10-15 00:03:14,859 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 00:03:14,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:03:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 00:03:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-15 00:03:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 00:03:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-15 00:03:14,865 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 70 [2020-10-15 00:03:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:14,865 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-15 00:03:14,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-15 00:03:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-15 00:03:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 00:03:14,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:14,866 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:14,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:03:14,867 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1524424983, now seen corresponding path program 33 times [2020-10-15 00:03:14,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:14,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400734164] [2020-10-15 00:03:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:14,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:14,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:17,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:17,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 00:03:17,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:17,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2240 [2020-10-15 00:03:17,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:17,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-15 00:03:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 00:03:17,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:19,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:19,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:19,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:19,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:19,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:19,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:19,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400734164] [2020-10-15 00:03:19,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:19,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-15 00:03:19,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371548296] [2020-10-15 00:03:19,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-15 00:03:19,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-15 00:03:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 00:03:19,245 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 64 states. [2020-10-15 00:03:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:19,370 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2020-10-15 00:03:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-15 00:03:19,373 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 72 [2020-10-15 00:03:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:19,374 INFO L225 Difference]: With dead ends: 97 [2020-10-15 00:03:19,374 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 00:03:19,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 00:03:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 00:03:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-15 00:03:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 00:03:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-15 00:03:19,384 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 72 [2020-10-15 00:03:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:19,385 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-15 00:03:19,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-15 00:03:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-15 00:03:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:03:19,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:19,386 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:19,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:03:19,386 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash 719094953, now seen corresponding path program 34 times [2020-10-15 00:03:19,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:19,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994612892] [2020-10-15 00:03:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:19,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:21,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:21,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 00:03:21,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2398 [2020-10-15 00:03:21,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:21,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-15 00:03:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-15 00:03:21,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:24,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:24,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:24,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:24,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:24,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:24,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:24,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:24,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994612892] [2020-10-15 00:03:24,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:24,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-15 00:03:24,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093288651] [2020-10-15 00:03:24,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-15 00:03:24,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-15 00:03:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 00:03:24,108 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 66 states. [2020-10-15 00:03:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:24,257 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-15 00:03:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-15 00:03:24,260 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 74 [2020-10-15 00:03:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:24,262 INFO L225 Difference]: With dead ends: 99 [2020-10-15 00:03:24,262 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 00:03:24,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 00:03:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 00:03:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-15 00:03:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 00:03:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-15 00:03:24,271 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 74 [2020-10-15 00:03:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:24,271 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-15 00:03:24,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-15 00:03:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-15 00:03:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 00:03:24,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:24,272 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:24,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:03:24,273 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash 668170857, now seen corresponding path program 35 times [2020-10-15 00:03:24,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:24,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172005573] [2020-10-15 00:03:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:24,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:25,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-15 00:03:26,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:29,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:29,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:29,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:29,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:29,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:29,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:29,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:29,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:29,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:29,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172005573] [2020-10-15 00:03:29,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:29,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-15 00:03:29,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925110484] [2020-10-15 00:03:29,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-15 00:03:29,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-15 00:03:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 00:03:29,333 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 68 states. [2020-10-15 00:03:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:29,475 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-15 00:03:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-15 00:03:29,475 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 76 [2020-10-15 00:03:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:29,476 INFO L225 Difference]: With dead ends: 101 [2020-10-15 00:03:29,476 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 00:03:29,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 00:03:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 00:03:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-15 00:03:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 00:03:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-15 00:03:29,482 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 76 [2020-10-15 00:03:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:29,482 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-15 00:03:29,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-15 00:03:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-15 00:03:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 00:03:29,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:29,483 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:29,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:03:29,483 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:29,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1025245143, now seen corresponding path program 36 times [2020-10-15 00:03:29,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:29,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555946379] [2020-10-15 00:03:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:29,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:32,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:32,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 00:03:32,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:32,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2887 [2020-10-15 00:03:32,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:32,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:32,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-15 00:03:32,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:32,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 00:03:32,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:35,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:35,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:35,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:35,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:35,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555946379] [2020-10-15 00:03:35,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:35,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-15 00:03:35,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664091371] [2020-10-15 00:03:35,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-15 00:03:35,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:35,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-15 00:03:35,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 00:03:35,028 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 70 states. [2020-10-15 00:03:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:35,139 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-10-15 00:03:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-15 00:03:35,140 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 78 [2020-10-15 00:03:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:35,141 INFO L225 Difference]: With dead ends: 103 [2020-10-15 00:03:35,141 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 00:03:35,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 00:03:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 00:03:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-15 00:03:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 00:03:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-15 00:03:35,146 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 78 [2020-10-15 00:03:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:35,146 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-15 00:03:35,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-15 00:03:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-15 00:03:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 00:03:35,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:35,148 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:35,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:03:35,148 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:35,148 INFO L82 PathProgramCache]: Analyzing trace with hash -605415959, now seen corresponding path program 37 times [2020-10-15 00:03:35,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:35,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542471140] [2020-10-15 00:03:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:38,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:03:38,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3283 [2020-10-15 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-15 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:41,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:41,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:41,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:41,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:41,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:41,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:41,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:41,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:41,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:41,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:41,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542471140] [2020-10-15 00:03:41,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:41,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-15 00:03:41,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271565421] [2020-10-15 00:03:41,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-15 00:03:41,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-15 00:03:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 00:03:41,286 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 72 states. [2020-10-15 00:03:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:41,419 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-10-15 00:03:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-15 00:03:41,420 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 80 [2020-10-15 00:03:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:41,421 INFO L225 Difference]: With dead ends: 105 [2020-10-15 00:03:41,421 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 00:03:41,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 00:03:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 00:03:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-15 00:03:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 00:03:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-15 00:03:41,427 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 80 [2020-10-15 00:03:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:41,427 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-15 00:03:41,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-15 00:03:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-15 00:03:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 00:03:41,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:41,428 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:41,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:03:41,429 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -876495959, now seen corresponding path program 38 times [2020-10-15 00:03:41,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:41,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133470633] [2020-10-15 00:03:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:41,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:41,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:44,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 00:03:44,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:44,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3339 [2020-10-15 00:03:44,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:44,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:44,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-15 00:03:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-15 00:03:44,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:47,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:47,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:47,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:47,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:47,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:47,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:47,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:47,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:47,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:47,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:47,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:47,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:47,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133470633] [2020-10-15 00:03:47,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:47,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-15 00:03:47,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856962903] [2020-10-15 00:03:47,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-15 00:03:47,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:47,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-15 00:03:47,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 00:03:47,763 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 74 states. [2020-10-15 00:03:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:47,924 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-10-15 00:03:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-15 00:03:47,928 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 82 [2020-10-15 00:03:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:47,929 INFO L225 Difference]: With dead ends: 107 [2020-10-15 00:03:47,929 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 00:03:47,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 00:03:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 00:03:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-15 00:03:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 00:03:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-15 00:03:47,933 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2020-10-15 00:03:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:47,933 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-15 00:03:47,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-15 00:03:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-15 00:03:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 00:03:47,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:47,935 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:47,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:03:47,935 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash 608629097, now seen corresponding path program 39 times [2020-10-15 00:03:47,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:47,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197572770] [2020-10-15 00:03:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:47,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:48,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:51,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:51,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 00:03:51,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:51,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3398 [2020-10-15 00:03:51,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:51,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:51,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-15 00:03:51,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:51,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-15 00:03:51,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:54,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:54,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:54,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:54,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:54,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:54,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:54,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:54,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:54,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:54,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197572770] [2020-10-15 00:03:54,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:54,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-15 00:03:54,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439436168] [2020-10-15 00:03:54,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-15 00:03:54,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-15 00:03:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 00:03:54,494 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 76 states. [2020-10-15 00:03:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:54,600 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-10-15 00:03:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-15 00:03:54,601 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 84 [2020-10-15 00:03:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:54,602 INFO L225 Difference]: With dead ends: 109 [2020-10-15 00:03:54,602 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 00:03:54,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 00:03:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 00:03:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-15 00:03:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 00:03:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-15 00:03:54,607 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 84 [2020-10-15 00:03:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:54,607 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-15 00:03:54,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-15 00:03:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-15 00:03:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 00:03:54,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:54,608 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:54,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:03:54,609 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1884665641, now seen corresponding path program 40 times [2020-10-15 00:03:54,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:54,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372000204] [2020-10-15 00:03:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:54,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3527 [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-15 00:03:58,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:01,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:01,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:01,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:01,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:01,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:01,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:01,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:01,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:01,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:01,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:01,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372000204] [2020-10-15 00:04:01,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:01,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-15 00:04:01,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376123101] [2020-10-15 00:04:01,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-15 00:04:01,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-15 00:04:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 00:04:01,524 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 78 states. [2020-10-15 00:04:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:01,714 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2020-10-15 00:04:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-15 00:04:01,715 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 86 [2020-10-15 00:04:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:01,716 INFO L225 Difference]: With dead ends: 111 [2020-10-15 00:04:01,716 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 00:04:01,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 00:04:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 00:04:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-15 00:04:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 00:04:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-15 00:04:01,721 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 86 [2020-10-15 00:04:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:01,722 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-15 00:04:01,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-15 00:04:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-15 00:04:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-15 00:04:01,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:01,723 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:01,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:04:01,723 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash -204862231, now seen corresponding path program 41 times [2020-10-15 00:04:01,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:01,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614181144] [2020-10-15 00:04:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:01,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:05,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4027 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-15 00:04:05,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:09,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:09,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:09,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:09,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:09,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:09,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:09,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:09,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614181144] [2020-10-15 00:04:09,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:09,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-15 00:04:09,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841285961] [2020-10-15 00:04:09,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-15 00:04:09,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:09,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-15 00:04:09,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 00:04:09,282 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 80 states. [2020-10-15 00:04:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:09,464 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-10-15 00:04:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-15 00:04:09,465 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 88 [2020-10-15 00:04:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:09,465 INFO L225 Difference]: With dead ends: 113 [2020-10-15 00:04:09,465 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 00:04:09,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 00:04:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 00:04:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-15 00:04:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 00:04:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-15 00:04:09,470 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 88 [2020-10-15 00:04:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:09,470 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-15 00:04:09,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-15 00:04:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-15 00:04:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 00:04:09,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:09,471 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:09,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:04:09,471 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1803547305, now seen corresponding path program 42 times [2020-10-15 00:04:09,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:09,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539223969] [2020-10-15 00:04:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:09,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:13,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4155 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 00:04:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:17,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:17,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:17,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:17,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:17,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:17,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:17,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:17,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:17,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539223969] [2020-10-15 00:04:17,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:17,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-15 00:04:17,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605950388] [2020-10-15 00:04:17,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-15 00:04:17,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-15 00:04:17,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 00:04:17,340 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 82 states. [2020-10-15 00:04:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:17,494 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2020-10-15 00:04:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-15 00:04:17,495 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 90 [2020-10-15 00:04:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:17,496 INFO L225 Difference]: With dead ends: 115 [2020-10-15 00:04:17,496 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 00:04:17,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 00:04:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 00:04:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-15 00:04:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 00:04:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-15 00:04:17,500 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 90 [2020-10-15 00:04:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:17,501 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-15 00:04:17,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-15 00:04:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-15 00:04:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-15 00:04:17,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:17,502 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:17,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:04:17,502 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash -850171799, now seen corresponding path program 43 times [2020-10-15 00:04:17,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:17,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001962793] [2020-10-15 00:04:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:17,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:22,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:22,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-15 00:04:22,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4625 [2020-10-15 00:04:22,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:22,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:22,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-15 00:04:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-15 00:04:22,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:26,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:26,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:26,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:26,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:26,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:26,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:26,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:26,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:26,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:26,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:26,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:26,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:26,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001962793] [2020-10-15 00:04:26,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:26,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-15 00:04:26,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768291401] [2020-10-15 00:04:26,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-15 00:04:26,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-15 00:04:26,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 00:04:26,065 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 84 states. [2020-10-15 00:04:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:26,192 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2020-10-15 00:04:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-15 00:04:26,193 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 92 [2020-10-15 00:04:26,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:26,193 INFO L225 Difference]: With dead ends: 117 [2020-10-15 00:04:26,194 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 00:04:26,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 00:04:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 00:04:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-15 00:04:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 00:04:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-15 00:04:26,198 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 92 [2020-10-15 00:04:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:26,198 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-15 00:04:26,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-15 00:04:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-15 00:04:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-15 00:04:26,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:26,200 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:26,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:04:26,200 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:26,200 INFO L82 PathProgramCache]: Analyzing trace with hash 136343081, now seen corresponding path program 44 times [2020-10-15 00:04:26,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:26,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340442625] [2020-10-15 00:04:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:26,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:30,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:30,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-15 00:04:30,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:30,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4724 [2020-10-15 00:04:30,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:30,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-15 00:04:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:30,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-15 00:04:30,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:35,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:35,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:35,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:35,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:35,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:35,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:35,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:35,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:35,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:35,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340442625] [2020-10-15 00:04:35,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:35,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-15 00:04:35,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558704152] [2020-10-15 00:04:35,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-15 00:04:35,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:35,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-15 00:04:35,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-15 00:04:35,063 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 86 states. [2020-10-15 00:04:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:35,270 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2020-10-15 00:04:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-15 00:04:35,271 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 94 [2020-10-15 00:04:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:35,273 INFO L225 Difference]: With dead ends: 119 [2020-10-15 00:04:35,273 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 00:04:35,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-15 00:04:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 00:04:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-15 00:04:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 00:04:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-15 00:04:35,277 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 94 [2020-10-15 00:04:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:35,278 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-15 00:04:35,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-15 00:04:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-15 00:04:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-15 00:04:35,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:35,279 INFO L422 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:35,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:04:35,279 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1010629655, now seen corresponding path program 45 times [2020-10-15 00:04:35,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:35,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070029802] [2020-10-15 00:04:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:35,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:40,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4883 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-15 00:04:40,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:44,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:44,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:44,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:44,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:44,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:44,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:44,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:44,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:44,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:44,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:44,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070029802] [2020-10-15 00:04:44,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:44,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-15 00:04:44,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198495886] [2020-10-15 00:04:44,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-15 00:04:44,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-15 00:04:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-15 00:04:44,407 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 88 states. [2020-10-15 00:04:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:44,560 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2020-10-15 00:04:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-15 00:04:44,561 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 96 [2020-10-15 00:04:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:44,562 INFO L225 Difference]: With dead ends: 121 [2020-10-15 00:04:44,562 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 00:04:44,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-15 00:04:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 00:04:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-15 00:04:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-15 00:04:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-10-15 00:04:44,567 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 96 [2020-10-15 00:04:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:44,568 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-10-15 00:04:44,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-15 00:04:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-10-15 00:04:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-15 00:04:44,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:44,569 INFO L422 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:44,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:04:44,569 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash 555166121, now seen corresponding path program 46 times [2020-10-15 00:04:44,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:44,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460671120] [2020-10-15 00:04:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:44,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:44,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 89 [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:49,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-15 00:04:49,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:54,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:54,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:54,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:54,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:54,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460671120] [2020-10-15 00:04:54,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:54,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-15 00:04:54,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093724578] [2020-10-15 00:04:54,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-15 00:04:54,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:54,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-15 00:04:54,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-15 00:04:54,187 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 90 states. [2020-10-15 00:04:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:54,346 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2020-10-15 00:04:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-15 00:04:54,347 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 98 [2020-10-15 00:04:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:54,348 INFO L225 Difference]: With dead ends: 123 [2020-10-15 00:04:54,348 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 00:04:54,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-15 00:04:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 00:04:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-15 00:04:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 00:04:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-15 00:04:54,355 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 98 [2020-10-15 00:04:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:54,355 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-15 00:04:54,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-15 00:04:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-15 00:04:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-15 00:04:54,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:54,356 INFO L422 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:54,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:04:54,357 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2046353257, now seen corresponding path program 47 times [2020-10-15 00:04:54,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:54,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398466301] [2020-10-15 00:04:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:54,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:59,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:59,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-15 00:04:59,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:59,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-15 00:04:59,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:59,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:59,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-15 00:04:59,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:59,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-15 00:04:59,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:04,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:04,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:04,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:04,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:04,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:04,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:04,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:04,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:04,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:04,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398466301] [2020-10-15 00:05:04,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:04,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-15 00:05:04,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68475291] [2020-10-15 00:05:04,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-15 00:05:04,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:04,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-15 00:05:04,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-15 00:05:04,215 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 92 states. [2020-10-15 00:05:04,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:04,422 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2020-10-15 00:05:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-15 00:05:04,422 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 100 [2020-10-15 00:05:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:04,423 INFO L225 Difference]: With dead ends: 125 [2020-10-15 00:05:04,423 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 00:05:04,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-15 00:05:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 00:05:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-15 00:05:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 00:05:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-15 00:05:04,428 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 100 [2020-10-15 00:05:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:04,429 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-15 00:05:04,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-15 00:05:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-15 00:05:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-15 00:05:04,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:04,430 INFO L422 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:04,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:05:04,430 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash 558114089, now seen corresponding path program 48 times [2020-10-15 00:05:04,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:04,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228331129] [2020-10-15 00:05:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:09,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:09,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 00:05:09,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:09,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-15 00:05:09,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:09,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 93 [2020-10-15 00:05:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-15 00:05:09,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:14,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:14,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:14,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:14,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:14,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:14,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:14,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228331129] [2020-10-15 00:05:14,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:14,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-10-15 00:05:14,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115721970] [2020-10-15 00:05:14,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-15 00:05:14,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-15 00:05:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-15 00:05:14,517 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 94 states. [2020-10-15 00:05:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:14,706 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-10-15 00:05:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-15 00:05:14,706 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 102 [2020-10-15 00:05:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:14,707 INFO L225 Difference]: With dead ends: 127 [2020-10-15 00:05:14,707 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 00:05:14,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-15 00:05:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 00:05:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-15 00:05:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 00:05:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-15 00:05:14,711 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 102 [2020-10-15 00:05:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:14,712 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-15 00:05:14,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-15 00:05:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-15 00:05:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 00:05:14,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:14,713 INFO L422 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:14,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:05:14,713 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 584383209, now seen corresponding path program 49 times [2020-10-15 00:05:14,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:14,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55953957] [2020-10-15 00:05:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:14,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:14,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:19,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:19,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-15 00:05:19,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:19,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-15 00:05:19,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:19,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:19,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 95 [2020-10-15 00:05:19,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:19,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-15 00:05:19,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:25,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:25,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:25,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:25,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:25,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:25,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:25,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:25,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:25,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55953957] [2020-10-15 00:05:25,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:25,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-10-15 00:05:25,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516084579] [2020-10-15 00:05:25,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-15 00:05:25,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-15 00:05:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-10-15 00:05:25,067 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 96 states. [2020-10-15 00:05:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:25,246 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2020-10-15 00:05:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-15 00:05:25,246 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 104 [2020-10-15 00:05:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:25,247 INFO L225 Difference]: With dead ends: 129 [2020-10-15 00:05:25,248 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 00:05:25,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-10-15 00:05:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 00:05:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-15 00:05:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 00:05:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-10-15 00:05:25,252 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 104 [2020-10-15 00:05:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:25,253 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-10-15 00:05:25,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-15 00:05:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-10-15 00:05:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-15 00:05:25,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:25,254 INFO L422 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:25,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:05:25,254 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:25,254 INFO L82 PathProgramCache]: Analyzing trace with hash 59203753, now seen corresponding path program 50 times [2020-10-15 00:05:25,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:25,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297114999] [2020-10-15 00:05:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:25,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:30,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 97 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-15 00:05:30,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:35,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:35,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:35,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:35,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:35,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:35,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:35,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:35,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:35,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297114999] [2020-10-15 00:05:35,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:35,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-10-15 00:05:35,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606698595] [2020-10-15 00:05:35,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-10-15 00:05:35,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-10-15 00:05:35,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-10-15 00:05:35,860 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 98 states. [2020-10-15 00:05:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:36,036 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-15 00:05:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-15 00:05:36,037 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 106 [2020-10-15 00:05:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:36,038 INFO L225 Difference]: With dead ends: 131 [2020-10-15 00:05:36,038 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 00:05:36,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-10-15 00:05:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 00:05:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-15 00:05:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 00:05:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-15 00:05:36,043 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 106 [2020-10-15 00:05:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:36,043 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-15 00:05:36,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-10-15 00:05:36,043 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-15 00:05:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-15 00:05:36,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:36,044 INFO L422 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:36,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:05:36,044 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2127079831, now seen corresponding path program 51 times [2020-10-15 00:05:36,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:36,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637072051] [2020-10-15 00:05:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:36,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:41,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:41,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-15 00:05:41,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:41,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-15 00:05:41,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:41,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 99 [2020-10-15 00:05:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-15 00:05:41,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:46,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:46,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:46,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:46,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637072051] [2020-10-15 00:05:46,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:46,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-10-15 00:05:46,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490986564] [2020-10-15 00:05:46,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-15 00:05:46,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-15 00:05:46,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-10-15 00:05:46,913 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 100 states. [2020-10-15 00:05:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:47,087 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-10-15 00:05:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-15 00:05:47,087 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 108 [2020-10-15 00:05:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:47,088 INFO L225 Difference]: With dead ends: 133 [2020-10-15 00:05:47,088 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 00:05:47,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-10-15 00:05:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 00:05:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-15 00:05:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 00:05:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-15 00:05:47,093 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 108 [2020-10-15 00:05:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:47,093 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-15 00:05:47,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-15 00:05:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-15 00:05:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-15 00:05:47,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:47,094 INFO L422 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:47,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:05:47,095 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1388370985, now seen corresponding path program 52 times [2020-10-15 00:05:47,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:47,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084093153] [2020-10-15 00:05:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:47,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:47,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:52,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:52,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-15 00:05:52,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-15 00:05:52,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:52,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 101 [2020-10-15 00:05:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-15 00:05:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:58,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:58,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:58,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:58,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:58,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084093153] [2020-10-15 00:05:58,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:58,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-10-15 00:05:58,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080138152] [2020-10-15 00:05:58,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-15 00:05:58,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-15 00:05:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-10-15 00:05:58,267 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 102 states. [2020-10-15 00:05:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:58,496 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2020-10-15 00:05:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-15 00:05:58,497 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 110 [2020-10-15 00:05:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:58,498 INFO L225 Difference]: With dead ends: 135 [2020-10-15 00:05:58,498 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 00:05:58,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-10-15 00:05:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 00:05:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-15 00:05:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 00:05:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-15 00:05:58,503 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 110 [2020-10-15 00:05:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:58,504 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-15 00:05:58,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-10-15 00:05:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-15 00:05:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-15 00:05:58,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:58,505 INFO L422 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:58,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:05:58,505 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash -402656791, now seen corresponding path program 53 times [2020-10-15 00:05:58,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:58,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136921315] [2020-10-15 00:05:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:58,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:58,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:03,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:03,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-15 00:06:03,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 00:06:03,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:03,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 103 [2020-10-15 00:06:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-15 00:06:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:09,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:09,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:09,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:09,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:09,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:09,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:09,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:09,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:09,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:09,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:09,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:09,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136921315] [2020-10-15 00:06:09,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:09,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-10-15 00:06:09,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978543426] [2020-10-15 00:06:09,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-10-15 00:06:09,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-10-15 00:06:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2020-10-15 00:06:09,917 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 104 states. [2020-10-15 00:06:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:10,105 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2020-10-15 00:06:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-10-15 00:06:10,106 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 112 [2020-10-15 00:06:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:10,107 INFO L225 Difference]: With dead ends: 137 [2020-10-15 00:06:10,107 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 00:06:10,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2020-10-15 00:06:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 00:06:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-15 00:06:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 00:06:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-10-15 00:06:10,113 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 112 [2020-10-15 00:06:10,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:10,113 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-10-15 00:06:10,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-10-15 00:06:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-10-15 00:06:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-15 00:06:10,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:10,114 INFO L422 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:10,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:06:10,114 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 701536169, now seen corresponding path program 54 times [2020-10-15 00:06:10,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:10,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538818102] [2020-10-15 00:06:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:10,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:10,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking...