/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:51:47,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:51:47,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:51:48,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:51:48,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:51:48,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:51:48,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:51:48,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:51:48,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:51:48,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:51:48,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:51:48,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:51:48,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:51:48,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:51:48,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:51:48,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:51:48,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:51:48,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:51:48,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:51:48,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:51:48,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:51:48,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:51:48,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:51:48,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:51:48,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:51:48,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:51:48,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:51:48,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:51:48,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:51:48,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:51:48,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:51:48,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:51:48,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:51:48,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:51:48,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:51:48,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:51:48,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:51:48,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:51:48,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:51:48,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:51:48,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:51:48,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:51:48,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:51:48,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:51:48,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:51:48,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:51:48,073 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:51:48,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:51:48,073 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:51:48,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:51:48,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:51:48,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:51:48,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:51:48,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:51:48,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:51:48,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:51:48,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:51:48,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:51:48,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:51:48,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:51:48,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:51:48,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:51:48,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:51:48,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:51:48,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:51:48,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:51:48,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:51:48,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:51:48,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:51:48,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:51:48,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:51:48,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:51:48,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:51:48,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:51:48,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:51:48,416 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:51:48,417 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:51:48,417 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-14 17:51:48,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25f020b0e/62788e0b95014b4d8161702ed655fe2b/FLAG170ee3705 [2020-10-14 17:51:48,914 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:51:48,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-14 17:51:48,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25f020b0e/62788e0b95014b4d8161702ed655fe2b/FLAG170ee3705 [2020-10-14 17:51:49,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25f020b0e/62788e0b95014b4d8161702ed655fe2b [2020-10-14 17:51:49,361 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:51:49,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:51:49,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:49,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:51:49,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:51:49,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eef8159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49, skipping insertion in model container [2020-10-14 17:51:49,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:51:49,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:51:49,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:49,623 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:51:49,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:49,702 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:51:49,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49 WrapperNode [2020-10-14 17:51:49,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:49,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:51:49,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:51:49,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:51:49,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... [2020-10-14 17:51:49,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:51:49,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:51:49,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:51:49,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:51:49,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:51:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:51:49,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:51:49,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:51:49,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:51:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:51:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:51:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:51:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:51:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:51:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:51:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:51:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:51:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:51:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:51:50,266 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:51:50,267 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-14 17:51:50,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:50 BoogieIcfgContainer [2020-10-14 17:51:50,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:51:50,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:51:50,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:51:50,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:51:50,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:51:49" (1/3) ... [2020-10-14 17:51:50,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b136025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:50, skipping insertion in model container [2020-10-14 17:51:50,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:49" (2/3) ... [2020-10-14 17:51:50,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b136025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:50, skipping insertion in model container [2020-10-14 17:51:50,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:50" (3/3) ... [2020-10-14 17:51:50,282 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2020-10-14 17:51:50,295 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:51:50,303 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:51:50,319 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:51:50,346 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:51:50,347 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:51:50,347 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:51:50,347 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:51:50,347 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:51:50,348 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:51:50,348 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:51:50,348 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:51:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-14 17:51:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 17:51:50,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:50,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:50,383 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2020-10-14 17:51:50,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:50,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140801750] [2020-10-14 17:51:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:50,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:52,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:52,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 17:51:52,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:51:52,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1900 [2020-10-14 17:51:52,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:52,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:52,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:51:52,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:51:52,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:51:52,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:51:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:52,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:52,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:52,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:52,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:51:52,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:52,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:52,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:52,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140801750] [2020-10-14 17:51:52,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:51:52,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:51:52,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493031884] [2020-10-14 17:51:52,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:51:52,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:52,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:51:52,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:52,570 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-10-14 17:51:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:52,869 INFO L93 Difference]: Finished difference Result 96 states and 145 transitions. [2020-10-14 17:51:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:51:52,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-14 17:51:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:52,885 INFO L225 Difference]: With dead ends: 96 [2020-10-14 17:51:52,885 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:51:52,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:51:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-14 17:51:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 17:51:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 17:51:52,955 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2020-10-14 17:51:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:52,955 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 17:51:52,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:51:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 17:51:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:51:52,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:52,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:52,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:51:52,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash -864373520, now seen corresponding path program 1 times [2020-10-14 17:51:52,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:52,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375075426] [2020-10-14 17:51:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:52,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:54,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:57,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:57,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:51:57,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:51:57,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:51:57,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:57,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:51:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 17:51:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:51:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:58,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:58,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:58,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:58,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:58,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:58,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:58,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:58,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 17:51:58,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375075426] [2020-10-14 17:51:58,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:58,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:51:58,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887345303] [2020-10-14 17:51:58,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:51:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:51:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:51:58,046 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-10-14 17:51:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:58,234 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-10-14 17:51:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:51:58,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-14 17:51:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:58,237 INFO L225 Difference]: With dead ends: 103 [2020-10-14 17:51:58,237 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 17:51:58,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:51:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 17:51:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-10-14 17:51:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 17:51:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-14 17:51:58,249 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 41 [2020-10-14 17:51:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:58,249 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-14 17:51:58,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:51:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-14 17:51:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 17:51:58,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:58,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:58,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:51:58,253 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:58,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1301663170, now seen corresponding path program 2 times [2020-10-14 17:51:58,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:58,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653751456] [2020-10-14 17:51:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:58,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:58,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:58,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:58,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:03,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 17:52:03,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:52:03,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:52:03,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:03,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:52:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:03,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:52:03,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:03,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:03,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:03,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:03,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:03,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:03,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:03,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:03,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 17:52:03,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653751456] [2020-10-14 17:52:03,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:03,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:52:03,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675806821] [2020-10-14 17:52:03,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:52:03,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:52:03,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:03,324 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 6 states. [2020-10-14 17:52:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:03,553 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2020-10-14 17:52:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:52:03,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-14 17:52:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:03,555 INFO L225 Difference]: With dead ends: 129 [2020-10-14 17:52:03,556 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 17:52:03,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 17:52:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-10-14 17:52:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 17:52:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2020-10-14 17:52:03,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 55 [2020-10-14 17:52:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:03,568 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2020-10-14 17:52:03,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:52:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2020-10-14 17:52:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 17:52:03,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:03,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:03,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:52:03,571 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1157140244, now seen corresponding path program 3 times [2020-10-14 17:52:03,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:03,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039048715] [2020-10-14 17:52:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:03,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:03,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:08,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 17:52:08,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:08,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 17:52:08,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:08,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:52:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:52:08,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:52:08,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:08,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:08,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:08,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:08,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:08,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:08,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:08,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:08,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-14 17:52:08,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039048715] [2020-10-14 17:52:08,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:08,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:52:08,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150129111] [2020-10-14 17:52:08,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:52:08,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:52:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:08,676 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 7 states. [2020-10-14 17:52:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:08,920 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2020-10-14 17:52:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:52:08,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-14 17:52:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:08,922 INFO L225 Difference]: With dead ends: 155 [2020-10-14 17:52:08,922 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 17:52:08,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 17:52:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-10-14 17:52:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 17:52:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-14 17:52:08,934 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 69 [2020-10-14 17:52:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:08,934 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-14 17:52:08,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:52:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-14 17:52:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 17:52:08,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:08,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:08,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:52:08,936 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 81926374, now seen corresponding path program 4 times [2020-10-14 17:52:08,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:08,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360330757] [2020-10-14 17:52:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:08,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:09,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:09,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:10,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:13,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:13,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 17:52:13,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:13,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 17:52:13,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:13,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:13,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:52:13,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 17:52:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:52:13,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:14,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:14,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:14,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:14,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:14,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:14,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:14,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:14,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:14,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:14,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:14,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:14,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-14 17:52:14,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360330757] [2020-10-14 17:52:14,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:14,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:52:14,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322916812] [2020-10-14 17:52:14,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:52:14,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:52:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:14,072 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 8 states. [2020-10-14 17:52:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:14,356 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2020-10-14 17:52:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:52:14,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-14 17:52:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:14,358 INFO L225 Difference]: With dead ends: 181 [2020-10-14 17:52:14,358 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 17:52:14,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 17:52:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-10-14 17:52:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 17:52:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-10-14 17:52:14,369 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 83 [2020-10-14 17:52:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:14,369 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-10-14 17:52:14,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:52:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-10-14 17:52:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 17:52:14,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:14,371 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:14,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:52:14,371 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2036757704, now seen corresponding path program 5 times [2020-10-14 17:52:14,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:14,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969702722] [2020-10-14 17:52:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:14,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:14,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:14,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:15,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:19,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:19,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 17:52:19,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:52:19,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:19,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:52:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 17:52:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:52:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:19,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:19,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:19,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:19,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:19,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:52:19,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:19,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-14 17:52:19,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969702722] [2020-10-14 17:52:19,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:19,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:52:19,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340632099] [2020-10-14 17:52:19,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:52:19,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:19,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:52:19,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:19,486 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 9 states. [2020-10-14 17:52:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:19,898 INFO L93 Difference]: Finished difference Result 207 states and 228 transitions. [2020-10-14 17:52:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:52:19,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2020-10-14 17:52:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:19,901 INFO L225 Difference]: With dead ends: 207 [2020-10-14 17:52:19,901 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 17:52:19,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 17:52:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-14 17:52:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 17:52:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-10-14 17:52:19,930 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 97 [2020-10-14 17:52:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:19,931 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-10-14 17:52:19,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:52:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-10-14 17:52:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 17:52:19,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:19,935 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:19,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:52:19,936 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2087585290, now seen corresponding path program 6 times [2020-10-14 17:52:19,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:19,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610130978] [2020-10-14 17:52:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:19,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:20,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:20,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:24,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:24,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 17:52:24,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:24,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:52:24,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:24,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:52:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 17:52:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:52:24,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:25,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:25,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:25,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:25,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:25,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:25,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:25,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:25,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:25,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-14 17:52:25,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610130978] [2020-10-14 17:52:25,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:25,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:52:25,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303047414] [2020-10-14 17:52:25,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:52:25,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:52:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:25,065 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 10 states. [2020-10-14 17:52:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:25,515 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2020-10-14 17:52:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:52:25,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2020-10-14 17:52:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:25,517 INFO L225 Difference]: With dead ends: 233 [2020-10-14 17:52:25,517 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 17:52:25,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 17:52:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2020-10-14 17:52:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 17:52:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2020-10-14 17:52:25,545 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 111 [2020-10-14 17:52:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:25,546 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2020-10-14 17:52:25,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:52:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2020-10-14 17:52:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 17:52:25,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:25,556 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:25,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:52:25,557 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash -474568356, now seen corresponding path program 7 times [2020-10-14 17:52:25,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:25,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608927964] [2020-10-14 17:52:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:25,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:25,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:25,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:25,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:30,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:30,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:52:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:30,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:30,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:30,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:30,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:30,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:30,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:30,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:30,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:30,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:30,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-14 17:52:30,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608927964] [2020-10-14 17:52:30,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:30,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:52:30,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515772315] [2020-10-14 17:52:30,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:52:30,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:52:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:30,695 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand 11 states. [2020-10-14 17:52:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:31,071 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2020-10-14 17:52:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:52:31,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2020-10-14 17:52:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:31,072 INFO L225 Difference]: With dead ends: 259 [2020-10-14 17:52:31,073 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 17:52:31,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 17:52:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2020-10-14 17:52:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 17:52:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2020-10-14 17:52:31,089 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 125 [2020-10-14 17:52:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:31,090 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2020-10-14 17:52:31,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:52:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2020-10-14 17:52:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-14 17:52:31,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:31,098 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:31,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:52:31,098 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:31,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash 382899502, now seen corresponding path program 8 times [2020-10-14 17:52:31,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:31,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299359691] [2020-10-14 17:52:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:31,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:31,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:31,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:36,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:36,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-14 17:52:36,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:36,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:52:36,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:36,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:52:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 17:52:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:52:36,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:36,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:36,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:36,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:36,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:36,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:36,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:36,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:36,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:36,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:36,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:36,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:36,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-14 17:52:36,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299359691] [2020-10-14 17:52:36,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:36,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:52:36,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167667236] [2020-10-14 17:52:36,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:52:36,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:52:36,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:36,232 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand 12 states. [2020-10-14 17:52:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:36,693 INFO L93 Difference]: Finished difference Result 285 states and 306 transitions. [2020-10-14 17:52:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:52:36,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 139 [2020-10-14 17:52:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:36,695 INFO L225 Difference]: With dead ends: 285 [2020-10-14 17:52:36,695 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 17:52:36,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 17:52:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-10-14 17:52:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 17:52:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2020-10-14 17:52:36,710 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 139 [2020-10-14 17:52:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:36,710 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2020-10-14 17:52:36,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:52:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2020-10-14 17:52:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 17:52:36,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:36,712 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:36,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:52:36,713 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1596516736, now seen corresponding path program 9 times [2020-10-14 17:52:36,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:36,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262761067] [2020-10-14 17:52:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:36,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:36,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:36,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:41,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:41,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 17:52:41,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 17:52:41,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:41,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:52:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:52:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:41,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:41,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:41,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:41,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:41,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:41,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:41,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:41,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:41,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:41,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:41,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-14 17:52:41,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262761067] [2020-10-14 17:52:41,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:41,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:52:41,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043798381] [2020-10-14 17:52:41,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:52:41,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:41,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:52:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:41,908 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand 13 states. [2020-10-14 17:52:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:42,383 INFO L93 Difference]: Finished difference Result 311 states and 332 transitions. [2020-10-14 17:52:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:52:42,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-10-14 17:52:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:42,386 INFO L225 Difference]: With dead ends: 311 [2020-10-14 17:52:42,386 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 17:52:42,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 17:52:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2020-10-14 17:52:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 17:52:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 181 transitions. [2020-10-14 17:52:42,396 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 181 transitions. Word has length 153 [2020-10-14 17:52:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:42,396 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 181 transitions. [2020-10-14 17:52:42,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:52:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 181 transitions. [2020-10-14 17:52:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-14 17:52:42,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:42,399 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:42,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:52:42,399 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:42,400 INFO L82 PathProgramCache]: Analyzing trace with hash 120112722, now seen corresponding path program 10 times [2020-10-14 17:52:42,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:42,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193082302] [2020-10-14 17:52:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:42,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:47,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:47,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-14 17:52:47,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:47,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-14 17:52:47,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:47,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:52:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:52:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:52:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:47,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:47,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:47,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:47,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:47,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:47,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:47,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:47,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:47,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-14 17:52:47,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193082302] [2020-10-14 17:52:47,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:47,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:52:47,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179944428] [2020-10-14 17:52:47,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:52:47,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:52:47,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:47,610 INFO L87 Difference]: Start difference. First operand 173 states and 181 transitions. Second operand 14 states. [2020-10-14 17:52:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:48,115 INFO L93 Difference]: Finished difference Result 337 states and 358 transitions. [2020-10-14 17:52:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:52:48,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2020-10-14 17:52:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:48,117 INFO L225 Difference]: With dead ends: 337 [2020-10-14 17:52:48,118 INFO L226 Difference]: Without dead ends: 194 [2020-10-14 17:52:48,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:48,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-14 17:52:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2020-10-14 17:52:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-14 17:52:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 195 transitions. [2020-10-14 17:52:48,134 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 195 transitions. Word has length 167 [2020-10-14 17:52:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:48,135 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 195 transitions. [2020-10-14 17:52:48,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:52:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 195 transitions. [2020-10-14 17:52:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-14 17:52:48,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:48,139 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:48,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:52:48,140 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash -330740828, now seen corresponding path program 11 times [2020-10-14 17:52:48,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:48,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746988667] [2020-10-14 17:52:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:48,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:53,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-14 17:52:53,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:53,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-14 17:52:53,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:53,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:53,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:52:53,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 17:52:53,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:52:53,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:53,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:53,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:53,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:53,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:53,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:53,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:53,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-14 17:52:53,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746988667] [2020-10-14 17:52:53,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:53,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:52:53,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336296504] [2020-10-14 17:52:53,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:52:53,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:52:53,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:52:53,380 INFO L87 Difference]: Start difference. First operand 187 states and 195 transitions. Second operand 15 states. [2020-10-14 17:52:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:53,931 INFO L93 Difference]: Finished difference Result 363 states and 384 transitions. [2020-10-14 17:52:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:52:53,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 181 [2020-10-14 17:52:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:53,934 INFO L225 Difference]: With dead ends: 363 [2020-10-14 17:52:53,934 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 17:52:53,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:52:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 17:52:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2020-10-14 17:52:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-14 17:52:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 209 transitions. [2020-10-14 17:52:53,944 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 209 transitions. Word has length 181 [2020-10-14 17:52:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:53,944 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 209 transitions. [2020-10-14 17:52:53,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:52:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 209 transitions. [2020-10-14 17:52:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-14 17:52:53,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:53,947 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:53,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:52:53,947 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1861641866, now seen corresponding path program 12 times [2020-10-14 17:52:53,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:53,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182039370] [2020-10-14 17:52:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:59,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-14 17:52:59,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:59,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-14 17:52:59,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:59,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:52:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-14 17:52:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:52:59,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:59,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:59,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:59,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:59,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:59,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:59,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:59,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:59,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:59,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-10-14 17:52:59,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182039370] [2020-10-14 17:52:59,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:59,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:52:59,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251953552] [2020-10-14 17:52:59,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:52:59,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:52:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:52:59,201 INFO L87 Difference]: Start difference. First operand 201 states and 209 transitions. Second operand 16 states. [2020-10-14 17:52:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:59,788 INFO L93 Difference]: Finished difference Result 389 states and 410 transitions. [2020-10-14 17:52:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:52:59,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 195 [2020-10-14 17:52:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:59,791 INFO L225 Difference]: With dead ends: 389 [2020-10-14 17:52:59,791 INFO L226 Difference]: Without dead ends: 222 [2020-10-14 17:52:59,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:52:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-14 17:52:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2020-10-14 17:52:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-14 17:52:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 223 transitions. [2020-10-14 17:52:59,800 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 223 transitions. Word has length 195 [2020-10-14 17:52:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:59,800 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 223 transitions. [2020-10-14 17:52:59,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:52:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 223 transitions. [2020-10-14 17:52:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-14 17:52:59,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:59,802 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:59,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:52:59,802 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1359949880, now seen corresponding path program 13 times [2020-10-14 17:52:59,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:59,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51876367] [2020-10-14 17:52:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:59,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:04,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-14 17:53:04,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:04,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-14 17:53:04,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:04,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:04,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:53:04,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 17:53:04,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:53:04,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:05,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:05,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:05,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:05,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:05,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:05,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:05,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:05,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-14 17:53:05,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51876367] [2020-10-14 17:53:05,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:05,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:53:05,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36630080] [2020-10-14 17:53:05,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:53:05,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:53:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:05,082 INFO L87 Difference]: Start difference. First operand 215 states and 223 transitions. Second operand 17 states. [2020-10-14 17:53:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:05,643 INFO L93 Difference]: Finished difference Result 415 states and 436 transitions. [2020-10-14 17:53:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:53:05,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 209 [2020-10-14 17:53:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:05,645 INFO L225 Difference]: With dead ends: 415 [2020-10-14 17:53:05,645 INFO L226 Difference]: Without dead ends: 236 [2020-10-14 17:53:05,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-14 17:53:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2020-10-14 17:53:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-14 17:53:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 237 transitions. [2020-10-14 17:53:05,665 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 237 transitions. Word has length 209 [2020-10-14 17:53:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:05,666 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 237 transitions. [2020-10-14 17:53:05,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:53:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 237 transitions. [2020-10-14 17:53:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-14 17:53:05,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:05,669 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:05,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:53:05,669 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1217269402, now seen corresponding path program 14 times [2020-10-14 17:53:05,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:05,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826726769] [2020-10-14 17:53:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:05,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:10,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-14 17:53:10,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:10,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-14 17:53:10,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:10,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:53:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 17:53:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:53:10,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:10,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:10,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:10,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:10,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:10,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:10,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-14 17:53:10,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826726769] [2020-10-14 17:53:10,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:10,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:53:10,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511332484] [2020-10-14 17:53:10,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:53:10,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:10,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:53:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:10,998 INFO L87 Difference]: Start difference. First operand 229 states and 237 transitions. Second operand 18 states. [2020-10-14 17:53:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:11,674 INFO L93 Difference]: Finished difference Result 441 states and 462 transitions. [2020-10-14 17:53:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:53:11,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 223 [2020-10-14 17:53:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:11,677 INFO L225 Difference]: With dead ends: 441 [2020-10-14 17:53:11,677 INFO L226 Difference]: Without dead ends: 250 [2020-10-14 17:53:11,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-14 17:53:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2020-10-14 17:53:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-14 17:53:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 251 transitions. [2020-10-14 17:53:11,688 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 251 transitions. Word has length 223 [2020-10-14 17:53:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:11,688 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 251 transitions. [2020-10-14 17:53:11,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:53:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 251 transitions. [2020-10-14 17:53:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-14 17:53:11,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:11,690 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:11,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:53:11,690 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 997750252, now seen corresponding path program 15 times [2020-10-14 17:53:11,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:11,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883063588] [2020-10-14 17:53:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:11,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:11,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:11,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:11,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:16,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:16,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:53:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:16,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:16,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:16,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:16,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-14 17:53:16,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883063588] [2020-10-14 17:53:16,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:16,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:53:16,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119982370] [2020-10-14 17:53:16,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:53:16,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:53:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:16,973 INFO L87 Difference]: Start difference. First operand 243 states and 251 transitions. Second operand 19 states. [2020-10-14 17:53:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:17,564 INFO L93 Difference]: Finished difference Result 467 states and 488 transitions. [2020-10-14 17:53:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:53:17,565 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 237 [2020-10-14 17:53:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:17,567 INFO L225 Difference]: With dead ends: 467 [2020-10-14 17:53:17,567 INFO L226 Difference]: Without dead ends: 264 [2020-10-14 17:53:17,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-14 17:53:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2020-10-14 17:53:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-14 17:53:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 265 transitions. [2020-10-14 17:53:17,578 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 265 transitions. Word has length 237 [2020-10-14 17:53:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:17,578 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 265 transitions. [2020-10-14 17:53:17,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:53:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 265 transitions. [2020-10-14 17:53:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-14 17:53:17,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:17,580 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:17,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:53:17,581 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1380918718, now seen corresponding path program 16 times [2020-10-14 17:53:17,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:17,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118609308] [2020-10-14 17:53:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:17,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:17,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:17,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:17,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:17,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:22,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:22,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-14 17:53:22,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:22,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-14 17:53:22,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:22,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:53:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 17:53:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:53:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:22,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:22,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:22,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:22,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-14 17:53:23,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118609308] [2020-10-14 17:53:23,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:23,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:53:23,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190635560] [2020-10-14 17:53:23,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:53:23,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:53:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:23,016 INFO L87 Difference]: Start difference. First operand 257 states and 265 transitions. Second operand 20 states. [2020-10-14 17:53:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:23,728 INFO L93 Difference]: Finished difference Result 493 states and 514 transitions. [2020-10-14 17:53:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:53:23,729 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 251 [2020-10-14 17:53:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:23,731 INFO L225 Difference]: With dead ends: 493 [2020-10-14 17:53:23,731 INFO L226 Difference]: Without dead ends: 278 [2020-10-14 17:53:23,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-14 17:53:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2020-10-14 17:53:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 17:53:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 279 transitions. [2020-10-14 17:53:23,741 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 279 transitions. Word has length 251 [2020-10-14 17:53:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:23,741 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 279 transitions. [2020-10-14 17:53:23,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:53:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 279 transitions. [2020-10-14 17:53:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-14 17:53:23,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:23,743 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:23,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:53:23,744 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:23,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:23,744 INFO L82 PathProgramCache]: Analyzing trace with hash -692503024, now seen corresponding path program 17 times [2020-10-14 17:53:23,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:23,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70830542] [2020-10-14 17:53:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:23,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:23,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:23,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:28,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 17:53:28,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:53:28,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:29,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:29,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:29,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:29,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:29,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:29,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:29,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:29,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:29,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:29,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:29,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:29,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-14 17:53:29,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70830542] [2020-10-14 17:53:29,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:29,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:53:29,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513347546] [2020-10-14 17:53:29,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:53:29,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:53:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:29,089 INFO L87 Difference]: Start difference. First operand 271 states and 279 transitions. Second operand 21 states. [2020-10-14 17:53:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:29,832 INFO L93 Difference]: Finished difference Result 519 states and 540 transitions. [2020-10-14 17:53:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:53:29,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 265 [2020-10-14 17:53:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:29,835 INFO L225 Difference]: With dead ends: 519 [2020-10-14 17:53:29,835 INFO L226 Difference]: Without dead ends: 292 [2020-10-14 17:53:29,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-14 17:53:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2020-10-14 17:53:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-14 17:53:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 293 transitions. [2020-10-14 17:53:29,847 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 293 transitions. Word has length 265 [2020-10-14 17:53:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:29,847 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 293 transitions. [2020-10-14 17:53:29,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:53:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 293 transitions. [2020-10-14 17:53:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-14 17:53:29,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:29,849 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:29,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:53:29,850 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1553604894, now seen corresponding path program 18 times [2020-10-14 17:53:29,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:29,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11621018] [2020-10-14 17:53:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:29,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:35,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:35,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-14 17:53:35,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:35,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5357 [2020-10-14 17:53:35,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:35,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:35,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:53:35,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 17:53:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:53:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:35,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:35,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:35,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:35,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:35,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-14 17:53:35,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11621018] [2020-10-14 17:53:35,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:35,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:53:35,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827069986] [2020-10-14 17:53:35,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:53:35,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:53:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:35,551 INFO L87 Difference]: Start difference. First operand 285 states and 293 transitions. Second operand 22 states. [2020-10-14 17:53:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:36,267 INFO L93 Difference]: Finished difference Result 545 states and 566 transitions. [2020-10-14 17:53:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:53:36,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 279 [2020-10-14 17:53:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:36,270 INFO L225 Difference]: With dead ends: 545 [2020-10-14 17:53:36,270 INFO L226 Difference]: Without dead ends: 306 [2020-10-14 17:53:36,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-14 17:53:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2020-10-14 17:53:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-14 17:53:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 307 transitions. [2020-10-14 17:53:36,291 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 307 transitions. Word has length 279 [2020-10-14 17:53:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:36,291 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 307 transitions. [2020-10-14 17:53:36,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:53:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 307 transitions. [2020-10-14 17:53:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-14 17:53:36,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:36,295 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:36,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:53:36,296 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1240717260, now seen corresponding path program 19 times [2020-10-14 17:53:36,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:36,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22199164] [2020-10-14 17:53:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:36,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:36,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:41,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:41,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-14 17:53:41,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-14 17:53:41,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:41,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:53:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-14 17:53:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:53:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:41,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:41,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:41,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:41,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-10-14 17:53:41,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22199164] [2020-10-14 17:53:41,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:41,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:53:41,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260362307] [2020-10-14 17:53:41,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:53:41,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:53:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:41,956 INFO L87 Difference]: Start difference. First operand 299 states and 307 transitions. Second operand 23 states. [2020-10-14 17:53:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:42,689 INFO L93 Difference]: Finished difference Result 571 states and 592 transitions. [2020-10-14 17:53:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:53:42,690 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 293 [2020-10-14 17:53:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:42,691 INFO L225 Difference]: With dead ends: 571 [2020-10-14 17:53:42,692 INFO L226 Difference]: Without dead ends: 320 [2020-10-14 17:53:42,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-14 17:53:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2020-10-14 17:53:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-14 17:53:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 321 transitions. [2020-10-14 17:53:42,704 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 321 transitions. Word has length 293 [2020-10-14 17:53:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:42,704 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 321 transitions. [2020-10-14 17:53:42,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:53:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 321 transitions. [2020-10-14 17:53:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-14 17:53:42,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:42,707 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:42,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:53:42,709 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1097546246, now seen corresponding path program 20 times [2020-10-14 17:53:42,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:42,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580253612] [2020-10-14 17:53:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:42,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:42,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:42,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:42,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:47,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:47,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:53:47,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:48,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:48,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:48,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:48,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:48,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:48,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:48,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:48,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:48,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:48,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:48,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:48,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-14 17:53:48,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580253612] [2020-10-14 17:53:48,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:48,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:53:48,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969452550] [2020-10-14 17:53:48,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:53:48,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:48,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:53:48,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:48,545 INFO L87 Difference]: Start difference. First operand 313 states and 321 transitions. Second operand 24 states. [2020-10-14 17:53:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:49,394 INFO L93 Difference]: Finished difference Result 597 states and 618 transitions. [2020-10-14 17:53:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:53:49,395 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 307 [2020-10-14 17:53:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:49,397 INFO L225 Difference]: With dead ends: 597 [2020-10-14 17:53:49,397 INFO L226 Difference]: Without dead ends: 334 [2020-10-14 17:53:49,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-14 17:53:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2020-10-14 17:53:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-14 17:53:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 335 transitions. [2020-10-14 17:53:49,409 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 335 transitions. Word has length 307 [2020-10-14 17:53:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:49,410 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 335 transitions. [2020-10-14 17:53:49,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:53:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 335 transitions. [2020-10-14 17:53:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-14 17:53:49,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:49,412 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:49,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:53:49,412 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1061827672, now seen corresponding path program 21 times [2020-10-14 17:53:49,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:49,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875897687] [2020-10-14 17:53:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:49,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:49,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:49,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:49,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:54,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:54,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-14 17:53:54,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:53:54,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5421 [2020-10-14 17:53:54,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:54,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:53:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 17:53:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:53:54,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:55,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:55,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:55,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:55,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:55,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:55,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:55,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:55,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-14 17:53:55,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875897687] [2020-10-14 17:53:55,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:55,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:53:55,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167250562] [2020-10-14 17:53:55,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:53:55,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:55,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:53:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:55,352 INFO L87 Difference]: Start difference. First operand 327 states and 335 transitions. Second operand 25 states. [2020-10-14 17:53:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:56,154 INFO L93 Difference]: Finished difference Result 623 states and 644 transitions. [2020-10-14 17:53:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:53:56,154 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 321 [2020-10-14 17:53:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:56,157 INFO L225 Difference]: With dead ends: 623 [2020-10-14 17:53:56,157 INFO L226 Difference]: Without dead ends: 348 [2020-10-14 17:53:56,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-14 17:53:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 341. [2020-10-14 17:53:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-14 17:53:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 349 transitions. [2020-10-14 17:53:56,172 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 349 transitions. Word has length 321 [2020-10-14 17:53:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:56,173 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 349 transitions. [2020-10-14 17:53:56,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:53:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 349 transitions. [2020-10-14 17:53:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-14 17:53:56,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:56,177 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:56,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:53:56,177 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2106050774, now seen corresponding path program 22 times [2020-10-14 17:53:56,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:56,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327445719] [2020-10-14 17:53:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:01,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:01,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-14 17:54:01,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:01,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5220 [2020-10-14 17:54:01,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:01,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:01,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:54:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:54:01,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:01,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:01,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:01,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:01,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:01,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2020-10-14 17:54:01,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327445719] [2020-10-14 17:54:01,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:01,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:54:01,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636552243] [2020-10-14 17:54:01,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:54:01,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:01,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:54:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:01,885 INFO L87 Difference]: Start difference. First operand 341 states and 349 transitions. Second operand 26 states. [2020-10-14 17:54:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:02,860 INFO L93 Difference]: Finished difference Result 649 states and 670 transitions. [2020-10-14 17:54:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:54:02,862 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 335 [2020-10-14 17:54:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:02,864 INFO L225 Difference]: With dead ends: 649 [2020-10-14 17:54:02,864 INFO L226 Difference]: Without dead ends: 362 [2020-10-14 17:54:02,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-14 17:54:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2020-10-14 17:54:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-14 17:54:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 363 transitions. [2020-10-14 17:54:02,876 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 363 transitions. Word has length 335 [2020-10-14 17:54:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:02,876 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 363 transitions. [2020-10-14 17:54:02,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:54:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 363 transitions. [2020-10-14 17:54:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-14 17:54:02,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:02,879 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:02,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:54:02,879 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1221354108, now seen corresponding path program 23 times [2020-10-14 17:54:02,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:02,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772047387] [2020-10-14 17:54:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:02,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:02,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:02,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:08,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:08,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-14 17:54:08,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:08,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-14 17:54:08,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:08,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:54:08,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-14 17:54:08,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:54:08,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:08,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:08,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:08,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:08,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:08,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3703 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2020-10-14 17:54:08,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772047387] [2020-10-14 17:54:08,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:08,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:54:08,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584310686] [2020-10-14 17:54:08,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:54:08,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:54:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:08,514 INFO L87 Difference]: Start difference. First operand 355 states and 363 transitions. Second operand 27 states. [2020-10-14 17:54:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:09,505 INFO L93 Difference]: Finished difference Result 675 states and 696 transitions. [2020-10-14 17:54:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:54:09,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 349 [2020-10-14 17:54:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:09,507 INFO L225 Difference]: With dead ends: 675 [2020-10-14 17:54:09,508 INFO L226 Difference]: Without dead ends: 376 [2020-10-14 17:54:09,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-14 17:54:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 369. [2020-10-14 17:54:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-14 17:54:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 377 transitions. [2020-10-14 17:54:09,520 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 377 transitions. Word has length 349 [2020-10-14 17:54:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:09,520 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 377 transitions. [2020-10-14 17:54:09,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:54:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 377 transitions. [2020-10-14 17:54:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-14 17:54:09,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:09,523 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:09,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:54:09,523 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1294325326, now seen corresponding path program 24 times [2020-10-14 17:54:09,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:09,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627460594] [2020-10-14 17:54:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:09,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:14,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:14,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-14 17:54:14,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:14,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5337 [2020-10-14 17:54:14,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:14,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:14,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:54:14,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-14 17:54:14,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:54:14,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:15,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:15,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:15,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:15,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:15,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:15,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:15,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:15,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:15,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:15,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:15,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:15,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2020-10-14 17:54:15,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627460594] [2020-10-14 17:54:15,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:15,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:54:15,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723339644] [2020-10-14 17:54:15,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:54:15,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:54:15,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:15,432 INFO L87 Difference]: Start difference. First operand 369 states and 377 transitions. Second operand 28 states. [2020-10-14 17:54:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:16,468 INFO L93 Difference]: Finished difference Result 701 states and 722 transitions. [2020-10-14 17:54:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:54:16,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 363 [2020-10-14 17:54:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:16,472 INFO L225 Difference]: With dead ends: 701 [2020-10-14 17:54:16,472 INFO L226 Difference]: Without dead ends: 390 [2020-10-14 17:54:16,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-14 17:54:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2020-10-14 17:54:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-14 17:54:16,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 391 transitions. [2020-10-14 17:54:16,484 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 391 transitions. Word has length 363 [2020-10-14 17:54:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:16,484 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 391 transitions. [2020-10-14 17:54:16,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:54:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 391 transitions. [2020-10-14 17:54:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-14 17:54:16,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:16,487 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:16,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:54:16,488 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1500230304, now seen corresponding path program 25 times [2020-10-14 17:54:16,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:16,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022106089] [2020-10-14 17:54:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:16,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:22,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5657 [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:54:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:22,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:22,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:22,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:22,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:22,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:22,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:22,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:22,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3750 trivial. 0 not checked. [2020-10-14 17:54:22,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022106089] [2020-10-14 17:54:22,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:22,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:54:22,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001488038] [2020-10-14 17:54:22,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:54:22,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:54:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:22,830 INFO L87 Difference]: Start difference. First operand 383 states and 391 transitions. Second operand 29 states. [2020-10-14 17:54:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:23,944 INFO L93 Difference]: Finished difference Result 727 states and 748 transitions. [2020-10-14 17:54:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:54:23,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 377 [2020-10-14 17:54:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:23,947 INFO L225 Difference]: With dead ends: 727 [2020-10-14 17:54:23,947 INFO L226 Difference]: Without dead ends: 404 [2020-10-14 17:54:23,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-14 17:54:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 397. [2020-10-14 17:54:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-14 17:54:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 405 transitions. [2020-10-14 17:54:23,958 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 405 transitions. Word has length 377 [2020-10-14 17:54:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:23,959 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 405 transitions. [2020-10-14 17:54:23,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:54:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 405 transitions. [2020-10-14 17:54:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 17:54:23,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:23,962 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:23,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:54:23,962 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1485641586, now seen corresponding path program 26 times [2020-10-14 17:54:23,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:23,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580173389] [2020-10-14 17:54:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:23,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:24,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:24,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:24,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:29,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5409 [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:54:29,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:29,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:29,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:29,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:29,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:29,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:29,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:29,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:29,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:29,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:29,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:29,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4056 trivial. 0 not checked. [2020-10-14 17:54:30,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580173389] [2020-10-14 17:54:30,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:30,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:54:30,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587686018] [2020-10-14 17:54:30,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:54:30,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:30,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:54:30,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:30,019 INFO L87 Difference]: Start difference. First operand 397 states and 405 transitions. Second operand 30 states. [2020-10-14 17:54:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:31,027 INFO L93 Difference]: Finished difference Result 753 states and 774 transitions. [2020-10-14 17:54:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:54:31,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 391 [2020-10-14 17:54:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:31,031 INFO L225 Difference]: With dead ends: 753 [2020-10-14 17:54:31,031 INFO L226 Difference]: Without dead ends: 418 [2020-10-14 17:54:31,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-14 17:54:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 411. [2020-10-14 17:54:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-14 17:54:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 419 transitions. [2020-10-14 17:54:31,042 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 419 transitions. Word has length 391 [2020-10-14 17:54:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:31,043 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 419 transitions. [2020-10-14 17:54:31,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:54:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 419 transitions. [2020-10-14 17:54:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-10-14 17:54:31,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:31,046 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:31,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:54:31,046 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash -394189628, now seen corresponding path program 27 times [2020-10-14 17:54:31,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:31,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392319858] [2020-10-14 17:54:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:31,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:31,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:36,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 413 [2020-10-14 17:54:36,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-14 17:54:36,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:36,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:54:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:54:36,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:36,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:36,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:36,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:36,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:36,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:36,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:36,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:36,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4374 trivial. 0 not checked. [2020-10-14 17:54:36,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392319858] [2020-10-14 17:54:36,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:36,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:54:36,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627092138] [2020-10-14 17:54:36,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:54:36,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:54:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:36,874 INFO L87 Difference]: Start difference. First operand 411 states and 419 transitions. Second operand 31 states. [2020-10-14 17:54:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:38,016 INFO L93 Difference]: Finished difference Result 779 states and 800 transitions. [2020-10-14 17:54:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:54:38,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 405 [2020-10-14 17:54:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:38,019 INFO L225 Difference]: With dead ends: 779 [2020-10-14 17:54:38,020 INFO L226 Difference]: Without dead ends: 432 [2020-10-14 17:54:38,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-14 17:54:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2020-10-14 17:54:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-14 17:54:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2020-10-14 17:54:38,030 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 405 [2020-10-14 17:54:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:38,030 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2020-10-14 17:54:38,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:54:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2020-10-14 17:54:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-14 17:54:38,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:38,034 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:38,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:54:38,034 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:38,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1816590998, now seen corresponding path program 28 times [2020-10-14 17:54:38,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:38,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938552058] [2020-10-14 17:54:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:38,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:38,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:38,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:43,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:43,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-10-14 17:54:43,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:43,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 17:54:43,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:43,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:54:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-14 17:54:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:54:43,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:43,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:43,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:43,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:43,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:43,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:43,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:43,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5488 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-10-14 17:54:43,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938552058] [2020-10-14 17:54:43,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:43,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:54:43,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262464355] [2020-10-14 17:54:43,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:54:43,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:54:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:43,777 INFO L87 Difference]: Start difference. First operand 425 states and 433 transitions. Second operand 32 states. [2020-10-14 17:54:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:44,927 INFO L93 Difference]: Finished difference Result 805 states and 826 transitions. [2020-10-14 17:54:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:54:44,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 419 [2020-10-14 17:54:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:44,932 INFO L225 Difference]: With dead ends: 805 [2020-10-14 17:54:44,933 INFO L226 Difference]: Without dead ends: 446 [2020-10-14 17:54:44,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-14 17:54:44,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 439. [2020-10-14 17:54:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-14 17:54:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 447 transitions. [2020-10-14 17:54:44,944 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 447 transitions. Word has length 419 [2020-10-14 17:54:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:44,944 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 447 transitions. [2020-10-14 17:54:44,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:54:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 447 transitions. [2020-10-14 17:54:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-14 17:54:44,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:44,947 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:44,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:54:44,948 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:44,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1645889304, now seen corresponding path program 29 times [2020-10-14 17:54:44,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:44,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249511790] [2020-10-14 17:54:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:44,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:44,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:45,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:45,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:50,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 441 [2020-10-14 17:54:50,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:50,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5551 [2020-10-14 17:54:50,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:50,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:50,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:54:50,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:50,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:54:50,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:51,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:51,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:51,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:51,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:51,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:51,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:51,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:51,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:51,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:51,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:51,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:51,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5887 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5046 trivial. 0 not checked. [2020-10-14 17:54:51,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249511790] [2020-10-14 17:54:51,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:51,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:54:51,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727923793] [2020-10-14 17:54:51,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:54:51,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:51,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:54:51,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:51,237 INFO L87 Difference]: Start difference. First operand 439 states and 447 transitions. Second operand 33 states. [2020-10-14 17:54:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:52,553 INFO L93 Difference]: Finished difference Result 831 states and 852 transitions. [2020-10-14 17:54:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:54:52,553 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 433 [2020-10-14 17:54:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:52,556 INFO L225 Difference]: With dead ends: 831 [2020-10-14 17:54:52,556 INFO L226 Difference]: Without dead ends: 460 [2020-10-14 17:54:52,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-14 17:54:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 453. [2020-10-14 17:54:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-14 17:54:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 461 transitions. [2020-10-14 17:54:52,567 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 461 transitions. Word has length 433 [2020-10-14 17:54:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:52,568 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 461 transitions. [2020-10-14 17:54:52,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:54:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 461 transitions. [2020-10-14 17:54:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-14 17:54:52,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:52,571 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:52,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:54:52,571 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:52,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1603502150, now seen corresponding path program 30 times [2020-10-14 17:54:52,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:52,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647394380] [2020-10-14 17:54:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:52,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:52,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:57,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:57,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 455 [2020-10-14 17:54:57,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:54:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5154 [2020-10-14 17:54:57,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:57,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:54:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 17:54:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:54:57,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:58,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:58,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:58,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:58,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:58,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:58,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6300 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5400 trivial. 0 not checked. [2020-10-14 17:54:58,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647394380] [2020-10-14 17:54:58,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:58,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:54:58,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421138383] [2020-10-14 17:54:58,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:54:58,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:54:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:58,543 INFO L87 Difference]: Start difference. First operand 453 states and 461 transitions. Second operand 34 states. [2020-10-14 17:54:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:59,967 INFO L93 Difference]: Finished difference Result 857 states and 878 transitions. [2020-10-14 17:54:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:54:59,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 447 [2020-10-14 17:54:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:59,971 INFO L225 Difference]: With dead ends: 857 [2020-10-14 17:54:59,971 INFO L226 Difference]: Without dead ends: 474 [2020-10-14 17:54:59,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-14 17:54:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 467. [2020-10-14 17:54:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-10-14 17:54:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 475 transitions. [2020-10-14 17:54:59,983 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 475 transitions. Word has length 447 [2020-10-14 17:54:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:59,984 INFO L479 AbstractCegarLoop]: Abstraction has 467 states and 475 transitions. [2020-10-14 17:54:59,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:54:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 475 transitions. [2020-10-14 17:54:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-10-14 17:54:59,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:59,987 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:59,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:54:59,988 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1846382836, now seen corresponding path program 31 times [2020-10-14 17:54:59,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:59,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089943612] [2020-10-14 17:54:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:00,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:00,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:00,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:00,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:23,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:23,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-10-14 17:55:23,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:55:23,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23425 [2020-10-14 17:55:23,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:23,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:55:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:55:23,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:24,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:24,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:24,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:24,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:24,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:55:24,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:24,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:24,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:24,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:24,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:24,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6727 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5766 trivial. 0 not checked. [2020-10-14 17:55:24,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089943612] [2020-10-14 17:55:24,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:24,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:55:24,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270652695] [2020-10-14 17:55:24,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:55:24,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:24,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:55:24,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:55:24,250 INFO L87 Difference]: Start difference. First operand 467 states and 475 transitions. Second operand 35 states. [2020-10-14 17:55:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:25,599 INFO L93 Difference]: Finished difference Result 883 states and 904 transitions. [2020-10-14 17:55:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:55:25,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 461 [2020-10-14 17:55:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:25,603 INFO L225 Difference]: With dead ends: 883 [2020-10-14 17:55:25,603 INFO L226 Difference]: Without dead ends: 488 [2020-10-14 17:55:25,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:55:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-14 17:55:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 481. [2020-10-14 17:55:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-14 17:55:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 489 transitions. [2020-10-14 17:55:25,615 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 489 transitions. Word has length 461 [2020-10-14 17:55:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:25,615 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 489 transitions. [2020-10-14 17:55:25,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:55:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 489 transitions. [2020-10-14 17:55:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-14 17:55:25,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:25,619 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:25,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:55:25,620 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:25,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1651071266, now seen corresponding path program 32 times [2020-10-14 17:55:25,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:25,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596511838] [2020-10-14 17:55:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:26,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:30,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-10-14 17:55:30,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:55:30,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-14 17:55:30,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:30,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:55:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-14 17:55:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:55:30,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:31,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:31,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:31,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:31,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7168 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 6144 trivial. 0 not checked. [2020-10-14 17:55:31,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596511838] [2020-10-14 17:55:31,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:31,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:55:31,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375683403] [2020-10-14 17:55:31,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:55:31,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:55:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:31,661 INFO L87 Difference]: Start difference. First operand 481 states and 489 transitions. Second operand 36 states. [2020-10-14 17:55:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:33,006 INFO L93 Difference]: Finished difference Result 909 states and 930 transitions. [2020-10-14 17:55:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:55:33,007 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 475 [2020-10-14 17:55:33,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:33,010 INFO L225 Difference]: With dead ends: 909 [2020-10-14 17:55:33,010 INFO L226 Difference]: Without dead ends: 502 [2020-10-14 17:55:33,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-14 17:55:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2020-10-14 17:55:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-14 17:55:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 503 transitions. [2020-10-14 17:55:33,021 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 503 transitions. Word has length 475 [2020-10-14 17:55:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:33,021 INFO L479 AbstractCegarLoop]: Abstraction has 495 states and 503 transitions. [2020-10-14 17:55:33,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:55:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 503 transitions. [2020-10-14 17:55:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-14 17:55:33,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:33,025 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:33,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:55:33,026 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1920973008, now seen corresponding path program 33 times [2020-10-14 17:55:33,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:33,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995062206] [2020-10-14 17:55:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:33,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:33,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:33,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:33,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:40,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-10-14 17:55:40,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:55:40,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7779 [2020-10-14 17:55:40,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:40,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:55:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 217 [2020-10-14 17:55:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:55:40,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:41,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:41,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:41,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:41,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:41,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:41,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:41,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:41,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:41,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:41,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:41,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7623 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 6534 trivial. 0 not checked. [2020-10-14 17:55:41,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995062206] [2020-10-14 17:55:41,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:41,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:55:41,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459199339] [2020-10-14 17:55:41,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:55:41,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:41,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:55:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:41,764 INFO L87 Difference]: Start difference. First operand 495 states and 503 transitions. Second operand 37 states. [2020-10-14 17:55:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:43,313 INFO L93 Difference]: Finished difference Result 935 states and 956 transitions. [2020-10-14 17:55:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:55:43,314 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 489 [2020-10-14 17:55:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:43,317 INFO L225 Difference]: With dead ends: 935 [2020-10-14 17:55:43,317 INFO L226 Difference]: Without dead ends: 516 [2020-10-14 17:55:43,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-14 17:55:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 509. [2020-10-14 17:55:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-14 17:55:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 517 transitions. [2020-10-14 17:55:43,328 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 517 transitions. Word has length 489 [2020-10-14 17:55:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:43,328 INFO L479 AbstractCegarLoop]: Abstraction has 509 states and 517 transitions. [2020-10-14 17:55:43,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:55:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 517 transitions. [2020-10-14 17:55:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-10-14 17:55:43,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:43,332 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:43,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:55:43,333 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash -589402110, now seen corresponding path program 34 times [2020-10-14 17:55:43,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:43,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127479970] [2020-10-14 17:55:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:43,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:43,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:43,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:43,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking...