/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:57:20,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:57:20,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:57:20,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:57:20,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:57:20,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:57:20,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:57:20,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:57:20,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:57:20,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:57:20,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:57:20,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:57:20,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:57:20,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:57:20,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:57:20,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:57:20,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:57:20,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:57:20,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:57:20,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:57:20,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:57:20,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:57:20,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:57:20,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:57:20,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:57:20,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:57:20,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:57:20,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:57:20,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:57:20,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:57:20,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:57:20,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:57:20,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:57:20,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:57:20,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:57:20,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:57:20,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:57:20,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:57:20,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:57:20,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:57:20,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:57:20,558 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 [2020-10-13 23:57:20,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:57:20,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:57:20,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:57:20,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:57:20,613 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:57:20,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:57:20,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:57:20,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:57:20,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:57:20,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:57:20,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:57:20,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:57:20,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:57:20,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:57:20,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:57:20,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:57:20,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:57:20,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:57:20,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:57:20,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:57:20,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:57:20,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:57:20,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:57:20,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:57:20,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:57:20,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:57:20,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:57:20,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:57:20,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:57:20,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:57:20,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:57:20,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:57:20,955 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:57:20,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:57:20,957 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:57:20,958 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-10-13 23:57:21,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70349d818/fb2b1fbc5e084d58b49f461576ad30fb/FLAG9f776d78a [2020-10-13 23:57:21,519 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:57:21,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-10-13 23:57:21,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70349d818/fb2b1fbc5e084d58b49f461576ad30fb/FLAG9f776d78a [2020-10-13 23:57:21,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70349d818/fb2b1fbc5e084d58b49f461576ad30fb [2020-10-13 23:57:21,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:57:21,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:57:21,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:57:21,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:57:21,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:57:21,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:57:21" (1/1) ... [2020-10-13 23:57:21,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1987833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:21, skipping insertion in model container [2020-10-13 23:57:21,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:57:21" (1/1) ... [2020-10-13 23:57:21,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:57:21,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:57:22,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:57:22,145 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:57:22,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:57:22,183 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:57:22,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22 WrapperNode [2020-10-13 23:57:22,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:57:22,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:57:22,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:57:22,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:57:22,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (1/1) ... [2020-10-13 23:57:22,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (1/1) ... [2020-10-13 23:57:22,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (1/1) ... [2020-10-13 23:57:22,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (1/1) ... [2020-10-13 23:57:22,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (1/1) ... [2020-10-13 23:57:22,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (1/1) ... [2020-10-13 23:57:22,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (1/1) ... [2020-10-13 23:57:22,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:57:22,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:57:22,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:57:22,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:57:22,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (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 [2020-10-13 23:57:22,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:57:22,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:57:22,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:57:22,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:57:22,375 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:57:22,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:57:22,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:57:22,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:57:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:57:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:57:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:57:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:57:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 23:57:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 23:57:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:57:22,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:57:22,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:57:22,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:57:22,684 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:57:22,684 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 23:57:22,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:57:22 BoogieIcfgContainer [2020-10-13 23:57:22,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:57:22,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:57:22,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:57:22,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:57:22,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:57:21" (1/3) ... [2020-10-13 23:57:22,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4ff8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:57:22, skipping insertion in model container [2020-10-13 23:57:22,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:57:22" (2/3) ... [2020-10-13 23:57:22,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4ff8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:57:22, skipping insertion in model container [2020-10-13 23:57:22,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:57:22" (3/3) ... [2020-10-13 23:57:22,697 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2020-10-13 23:57:22,707 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:57:22,714 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:57:22,729 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:57:22,753 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:57:22,753 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:57:22,753 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:57:22,753 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:57:22,753 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:57:22,754 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:57:22,754 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:57:22,754 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:57:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-13 23:57:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 23:57:22,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:22,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:22,782 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:22,788 INFO L82 PathProgramCache]: Analyzing trace with hash -72789506, now seen corresponding path program 1 times [2020-10-13 23:57:22,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:22,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134308230] [2020-10-13 23:57:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:22,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:23,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:57:23,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:23,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-13 23:57:23,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:23,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:23,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:23,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:57:23,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:23,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:57:23,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:23,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:23,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:23,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 23:57:23,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:23,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:23,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:57:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:23,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134308230] [2020-10-13 23:57:23,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:57:23,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:57:23,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075422499] [2020-10-13 23:57:23,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:57:23,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:57:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:57:23,221 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-13 23:57:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:23,344 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2020-10-13 23:57:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:57:23,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 23:57:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:23,358 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:57:23,358 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:57:23,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:57:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:57:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-13 23:57:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:57:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 23:57:23,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-13 23:57:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:23,409 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 23:57:23,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:57:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 23:57:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 23:57:23,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:23,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:23,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:57:23,411 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1254487381, now seen corresponding path program 1 times [2020-10-13 23:57:23,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:23,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242450333] [2020-10-13 23:57:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:23,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:57:23,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:23,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-13 23:57:23,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:23,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:23,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:23,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:23,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:57:23,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:57:23,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:23,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:23,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:23,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:23,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 23:57:23,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:23,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:23,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:23,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:23,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242450333] [2020-10-13 23:57:23,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:57:23,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:57:23,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947858858] [2020-10-13 23:57:23,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:57:23,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:23,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:57:23,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:57:23,727 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-13 23:57:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:23,861 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-13 23:57:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:57:23,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 23:57:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:23,863 INFO L225 Difference]: With dead ends: 43 [2020-10-13 23:57:23,863 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:57:23,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:57:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:57:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-13 23:57:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:57:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 23:57:23,873 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-10-13 23:57:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:23,874 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 23:57:23,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:57:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 23:57:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 23:57:23,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:23,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:23,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:57:23,876 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:23,876 INFO L82 PathProgramCache]: Analyzing trace with hash 343855824, now seen corresponding path program 1 times [2020-10-13 23:57:23,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:23,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198209714] [2020-10-13 23:57:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:24,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 23:57:24,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:57:24,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-13 23:57:24,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:24,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:24,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:57:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:24,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:57:24,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:24,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:24,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:24,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:57:24,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:24,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:24,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:24,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:24,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:24,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198209714] [2020-10-13 23:57:24,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:24,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:57:24,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939575042] [2020-10-13 23:57:24,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:57:24,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:24,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:57:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:57:24,912 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-10-13 23:57:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:25,068 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-10-13 23:57:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:57:25,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 23:57:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:25,071 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:57:25,071 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:57:25,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:57:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:57:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-10-13 23:57:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:57:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 23:57:25,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-10-13 23:57:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:25,080 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 23:57:25,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:57:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 23:57:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:57:25,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:25,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:25,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:57:25,082 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:25,083 INFO L82 PathProgramCache]: Analyzing trace with hash 908656757, now seen corresponding path program 2 times [2020-10-13 23:57:25,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:25,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146567228] [2020-10-13 23:57:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:25,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:26,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:26,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:57:26,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:26,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1605 [2020-10-13 23:57:26,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:26,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:26,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:57:26,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:57:26,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:26,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:26,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:26,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:26,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:26,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:26,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:57:26,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:26,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:26,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:26,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146567228] [2020-10-13 23:57:26,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:26,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:57:26,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432866595] [2020-10-13 23:57:26,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:57:26,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:26,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:57:26,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:57:26,809 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-13 23:57:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:26,994 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-10-13 23:57:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:57:26,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:57:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:26,996 INFO L225 Difference]: With dead ends: 61 [2020-10-13 23:57:26,996 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:57:26,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:57:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:57:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-10-13 23:57:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:57:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 23:57:27,006 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2020-10-13 23:57:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:27,006 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 23:57:27,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:57:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 23:57:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:57:27,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:27,008 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:27,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:57:27,009 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -167128166, now seen corresponding path program 3 times [2020-10-13 23:57:27,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:27,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150693534] [2020-10-13 23:57:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:27,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:27,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:29,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:29,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:57:29,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:29,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2457 [2020-10-13 23:57:29,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:29,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:57:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:57:29,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:29,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:29,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:29,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:29,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:29,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:29,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:57:29,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:29,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:29,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:29,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:29,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:29,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:29,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150693534] [2020-10-13 23:57:29,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:29,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:57:29,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168616132] [2020-10-13 23:57:29,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:57:29,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:29,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:57:29,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:57:29,574 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2020-10-13 23:57:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:29,762 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-13 23:57:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:57:29,763 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 23:57:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:29,764 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:57:29,765 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:57:29,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:57:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:57:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2020-10-13 23:57:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:57:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 23:57:29,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2020-10-13 23:57:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:29,773 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 23:57:29,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:57:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 23:57:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:57:29,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:29,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:29,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:57:29,775 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1699908671, now seen corresponding path program 4 times [2020-10-13 23:57:29,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:29,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067959058] [2020-10-13 23:57:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:29,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:30,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:33,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:33,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:57:33,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:33,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3788 [2020-10-13 23:57:33,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:33,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:57:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:57:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:33,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:33,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:33,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:33,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:33,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:33,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:33,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:33,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:33,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067959058] [2020-10-13 23:57:33,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:33,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:57:33,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939694136] [2020-10-13 23:57:33,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:57:33,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:33,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:57:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:57:33,670 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2020-10-13 23:57:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:33,852 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2020-10-13 23:57:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:57:33,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 23:57:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:33,854 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:57:33,854 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:57:33,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:57:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:57:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2020-10-13 23:57:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:57:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-13 23:57:33,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 30 [2020-10-13 23:57:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:33,870 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-13 23:57:33,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:57:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-13 23:57:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:57:33,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:33,871 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:33,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:57:33,871 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash 445934180, now seen corresponding path program 5 times [2020-10-13 23:57:33,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:33,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369520050] [2020-10-13 23:57:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:34,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:38,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:38,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:57:38,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:38,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:57:38,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:38,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:57:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:57:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:39,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:39,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:39,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:39,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:57:39,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:39,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:39,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:39,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:39,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:39,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369520050] [2020-10-13 23:57:39,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:39,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:57:39,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419111143] [2020-10-13 23:57:39,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:57:39,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:39,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:57:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:57:39,017 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 9 states. [2020-10-13 23:57:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:39,290 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2020-10-13 23:57:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:57:39,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 23:57:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:39,292 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:57:39,292 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:57:39,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:57:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:57:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2020-10-13 23:57:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:57:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 23:57:39,307 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 34 [2020-10-13 23:57:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:39,309 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 23:57:39,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:57:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 23:57:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:57:39,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:39,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:39,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:57:39,314 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:39,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2118078967, now seen corresponding path program 6 times [2020-10-13 23:57:39,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:39,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916894264] [2020-10-13 23:57:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:39,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:39,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:44,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:44,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:57:44,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:44,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-13 23:57:44,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:44,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:57:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:44,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:57:44,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:44,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:44,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:44,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:44,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:44,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:57:44,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:44,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:44,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:44,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:44,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:44,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916894264] [2020-10-13 23:57:44,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:44,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:57:44,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666253249] [2020-10-13 23:57:44,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:57:44,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:44,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:57:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:57:44,618 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 10 states. [2020-10-13 23:57:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:44,879 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2020-10-13 23:57:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:57:44,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 23:57:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:44,881 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:57:44,881 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:57:44,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:57:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:57:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2020-10-13 23:57:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:57:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-13 23:57:44,899 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2020-10-13 23:57:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:44,900 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-13 23:57:44,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:57:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-13 23:57:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:57:44,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:44,903 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:44,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:57:44,904 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:44,904 INFO L82 PathProgramCache]: Analyzing trace with hash 740857646, now seen corresponding path program 7 times [2020-10-13 23:57:44,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:44,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385554269] [2020-10-13 23:57:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:44,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:45,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:49,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:49,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:57:49,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:49,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:57:49,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:49,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:57:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:49,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:57:49,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:50,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:50,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:50,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:50,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:50,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:50,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:57:50,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:50,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:50,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:50,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:50,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:50,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:50,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385554269] [2020-10-13 23:57:50,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:50,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:57:50,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873570069] [2020-10-13 23:57:50,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:57:50,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:57:50,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:57:50,074 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 11 states. [2020-10-13 23:57:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:50,304 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2020-10-13 23:57:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:57:50,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 23:57:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:50,306 INFO L225 Difference]: With dead ends: 106 [2020-10-13 23:57:50,307 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:57:50,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:57:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:57:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2020-10-13 23:57:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:57:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-13 23:57:50,323 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 42 [2020-10-13 23:57:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:50,327 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-13 23:57:50,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:57:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-13 23:57:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:57:50,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:50,329 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:50,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:57:50,329 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash 545088979, now seen corresponding path program 8 times [2020-10-13 23:57:50,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:50,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117754448] [2020-10-13 23:57:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:50,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:54,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:55,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:55,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:57:55,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:57:55,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 23:57:55,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:55,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:55,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:57:55,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:57:55,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:57:55,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:55,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:55,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:55,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:55,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:55,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:57:55,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:55,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:55,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:55,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:55,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:55,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:55,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117754448] [2020-10-13 23:57:55,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:55,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:57:55,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819441889] [2020-10-13 23:57:55,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:57:55,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:57:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:57:55,585 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 12 states. [2020-10-13 23:57:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:55,830 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2020-10-13 23:57:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:57:55,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 23:57:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:55,832 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:57:55,832 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:57:55,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:57:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:57:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2020-10-13 23:57:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:57:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 23:57:55,840 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 46 [2020-10-13 23:57:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:55,840 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 23:57:55,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:57:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 23:57:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:57:55,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:55,841 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:55,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:57:55,842 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash 718297592, now seen corresponding path program 9 times [2020-10-13 23:57:55,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:55,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001373993] [2020-10-13 23:57:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:55,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:00,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:58:00,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:58:00,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:01,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:01,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:01,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:01,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:01,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:01,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:01,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:01,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:01,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:01,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:01,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:01,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:58:01,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001373993] [2020-10-13 23:58:01,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:01,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:58:01,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911443673] [2020-10-13 23:58:01,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:58:01,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:01,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:58:01,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:58:01,050 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 13 states. [2020-10-13 23:58:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:01,334 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2020-10-13 23:58:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:58:01,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 23:58:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:01,336 INFO L225 Difference]: With dead ends: 124 [2020-10-13 23:58:01,336 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:58:01,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:58:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:58:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2020-10-13 23:58:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:58:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-13 23:58:01,344 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 50 [2020-10-13 23:58:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:01,344 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-13 23:58:01,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:58:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-13 23:58:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:58:01,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:01,345 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:01,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:58:01,346 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 747811741, now seen corresponding path program 10 times [2020-10-13 23:58:01,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:01,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618009816] [2020-10-13 23:58:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:01,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:09,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:09,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:58:09,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:58:09,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8423 [2020-10-13 23:58:09,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:09,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:58:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:58:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:58:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:09,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:09,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:09,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:09,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:09,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:09,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:09,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:09,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:09,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:58:09,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618009816] [2020-10-13 23:58:09,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:09,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:58:09,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438084871] [2020-10-13 23:58:09,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:58:09,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:58:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:58:09,947 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 14 states. [2020-10-13 23:58:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:10,244 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2020-10-13 23:58:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:58:10,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 23:58:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:10,247 INFO L225 Difference]: With dead ends: 133 [2020-10-13 23:58:10,247 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:58:10,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:58:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:58:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2020-10-13 23:58:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:58:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-13 23:58:10,255 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 54 [2020-10-13 23:58:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:10,255 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-13 23:58:10,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:58:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-13 23:58:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:58:10,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:10,257 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:10,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:58:10,257 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1821749954, now seen corresponding path program 11 times [2020-10-13 23:58:10,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:10,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214247720] [2020-10-13 23:58:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:10,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:12,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:18,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:18,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:58:18,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:58:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8476 [2020-10-13 23:58:18,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:18,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:58:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:58:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:58:18,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:18,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:18,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:18,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:18,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:18,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:18,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:18,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:18,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:58:18,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214247720] [2020-10-13 23:58:18,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:18,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:58:18,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249197464] [2020-10-13 23:58:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:58:18,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:58:18,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:58:18,925 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 15 states. [2020-10-13 23:58:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:19,221 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2020-10-13 23:58:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:58:19,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-13 23:58:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:19,223 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:58:19,224 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:58:19,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:58:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:58:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 67. [2020-10-13 23:58:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:58:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-10-13 23:58:19,232 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 58 [2020-10-13 23:58:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:19,232 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-10-13 23:58:19,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:58:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-10-13 23:58:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:58:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:19,233 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:19,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:58:19,233 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash -418736281, now seen corresponding path program 12 times [2020-10-13 23:58:19,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:19,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759790942] [2020-10-13 23:58:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:19,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:58:31,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:58:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12050 [2020-10-13 23:58:31,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:58:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:58:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:58:31,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:31,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:31,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:31,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:31,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:31,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:58:31,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759790942] [2020-10-13 23:58:31,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:31,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:58:31,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403956818] [2020-10-13 23:58:31,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:58:31,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:58:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:58:31,505 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 16 states. [2020-10-13 23:58:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:31,859 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2020-10-13 23:58:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:58:31,860 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-13 23:58:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:31,862 INFO L225 Difference]: With dead ends: 151 [2020-10-13 23:58:31,862 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:58:31,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:58:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:58:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 71. [2020-10-13 23:58:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:58:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-13 23:58:31,881 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 62 [2020-10-13 23:58:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:31,882 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-13 23:58:31,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:58:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-13 23:58:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:58:31,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:31,885 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:31,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:58:31,885 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1652383348, now seen corresponding path program 13 times [2020-10-13 23:58:31,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:31,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223482102] [2020-10-13 23:58:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:31,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:43,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:43,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:58:43,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:43,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12067 [2020-10-13 23:58:43,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:43,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 23:58:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:58:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:58:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:46,483 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2020-10-13 23:58:46,658 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-10-13 23:58:47,091 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-10-13 23:58:47,225 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-13 23:58:47,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:47,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:47,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:47,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:47,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:47,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:58:47,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:47,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:58:47,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 20 proven. 167 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-10-13 23:58:47,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223482102] [2020-10-13 23:58:47,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:47,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:58:47,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817762886] [2020-10-13 23:58:47,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:58:47,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:58:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:58:47,751 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 25 states. [2020-10-13 23:58:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:49,214 INFO L93 Difference]: Finished difference Result 198 states and 235 transitions. [2020-10-13 23:58:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:58:49,214 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-13 23:58:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:49,219 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:58:49,219 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:58:49,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:58:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:58:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 130. [2020-10-13 23:58:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:58:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2020-10-13 23:58:49,233 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 66 [2020-10-13 23:58:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:49,234 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2020-10-13 23:58:49,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:58:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2020-10-13 23:58:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:58:49,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:49,235 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:49,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:58:49,236 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:49,236 INFO L82 PathProgramCache]: Analyzing trace with hash -951318770, now seen corresponding path program 1 times [2020-10-13 23:58:49,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:49,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372056425] [2020-10-13 23:58:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:59,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:59,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:58:59,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:59,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10619 [2020-10-13 23:58:59,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:59,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 23:58:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:58:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:58:59,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:02,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:02,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:02,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:02,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:02,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:02,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:59:02,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:02,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:02,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:59:02,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:02,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:59:02,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 10 proven. 245 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 23:59:02,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372056425] [2020-10-13 23:59:02,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:02,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:59:02,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004913265] [2020-10-13 23:59:02,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:59:02,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:59:02,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:59:02,737 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand 30 states. [2020-10-13 23:59:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:05,494 INFO L93 Difference]: Finished difference Result 233 states and 279 transitions. [2020-10-13 23:59:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:59:05,495 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-13 23:59:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:05,498 INFO L225 Difference]: With dead ends: 233 [2020-10-13 23:59:05,498 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 23:59:05,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=563, Invalid=2743, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 23:59:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 23:59:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 133. [2020-10-13 23:59:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:59:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2020-10-13 23:59:05,512 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 66 [2020-10-13 23:59:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:05,513 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2020-10-13 23:59:05,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:59:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2020-10-13 23:59:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:59:05,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:05,514 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:05,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:59:05,515 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:05,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1362720270, now seen corresponding path program 2 times [2020-10-13 23:59:05,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:05,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968065791] [2020-10-13 23:59:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:05,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:18,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:18,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:59:18,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:18,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12550 [2020-10-13 23:59:18,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:18,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 23:59:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:59:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:59:18,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:20,588 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-10-13 23:59:20,746 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-10-13 23:59:21,110 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2020-10-13 23:59:21,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:21,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:21,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:21,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:21,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:21,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:21,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:59:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:21,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:59:21,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 11 proven. 264 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 23:59:21,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968065791] [2020-10-13 23:59:21,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:21,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:59:21,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005927068] [2020-10-13 23:59:21,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:59:21,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:21,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:59:21,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:59:21,405 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand 32 states. [2020-10-13 23:59:23,342 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-13 23:59:23,694 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-13 23:59:23,895 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-13 23:59:24,216 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-13 23:59:24,431 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-13 23:59:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:25,838 INFO L93 Difference]: Finished difference Result 336 states and 401 transitions. [2020-10-13 23:59:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:59:25,839 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2020-10-13 23:59:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:25,841 INFO L225 Difference]: With dead ends: 336 [2020-10-13 23:59:25,841 INFO L226 Difference]: Without dead ends: 334 [2020-10-13 23:59:25,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=756, Invalid=3800, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 23:59:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-13 23:59:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 177. [2020-10-13 23:59:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 23:59:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 218 transitions. [2020-10-13 23:59:25,858 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 218 transitions. Word has length 66 [2020-10-13 23:59:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:25,859 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 218 transitions. [2020-10-13 23:59:25,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:59:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 218 transitions. [2020-10-13 23:59:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:59:25,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:25,860 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:25,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:59:25,860 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2063784848, now seen corresponding path program 3 times [2020-10-13 23:59:25,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:25,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041785414] [2020-10-13 23:59:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:25,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:38,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:38,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:59:38,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:38,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13078 [2020-10-13 23:59:38,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:38,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 23:59:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:59:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:59:38,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:41,824 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2020-10-13 23:59:42,029 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 35 [2020-10-13 23:59:43,300 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 24 [2020-10-13 23:59:43,595 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 36 [2020-10-13 23:59:43,865 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 28 [2020-10-13 23:59:44,116 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 34 [2020-10-13 23:59:44,280 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2020-10-13 23:59:44,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:44,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:44,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:44,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:44,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:44,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:44,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:44,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:59:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:59:44,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-13 23:59:44,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041785414] [2020-10-13 23:59:44,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:44,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:59:44,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343872888] [2020-10-13 23:59:44,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:59:44,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:59:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:59:44,638 INFO L87 Difference]: Start difference. First operand 177 states and 218 transitions. Second operand 25 states. [2020-10-13 23:59:46,359 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-13 23:59:46,692 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-13 23:59:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:48,417 INFO L93 Difference]: Finished difference Result 409 states and 499 transitions. [2020-10-13 23:59:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:59:48,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-13 23:59:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:48,423 INFO L225 Difference]: With dead ends: 409 [2020-10-13 23:59:48,423 INFO L226 Difference]: Without dead ends: 407 [2020-10-13 23:59:48,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=769, Invalid=2653, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 23:59:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-13 23:59:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 187. [2020-10-13 23:59:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 23:59:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 231 transitions. [2020-10-13 23:59:48,445 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 231 transitions. Word has length 66 [2020-10-13 23:59:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:48,445 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 231 transitions. [2020-10-13 23:59:48,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:59:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 231 transitions. [2020-10-13 23:59:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:59:48,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:48,447 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:48,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:59:48,447 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1654704784, now seen corresponding path program 4 times [2020-10-13 23:59:48,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:48,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122584409] [2020-10-13 23:59:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:48,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:01,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:01,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 00:00:01,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:01,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13172 [2020-10-14 00:00:01,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:01,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:01,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 00:00:01,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 00:00:01,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 00:00:01,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:04,150 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-10-14 00:00:04,347 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2020-10-14 00:00:05,011 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 37 [2020-10-14 00:00:05,196 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 33 [2020-10-14 00:00:05,396 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 30 [2020-10-14 00:00:05,734 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2020-10-14 00:00:06,046 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 40 [2020-10-14 00:00:06,299 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 34 [2020-10-14 00:00:06,451 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-14 00:00:06,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:06,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:06,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:06,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:06,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:06,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:00:06,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:06,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:00:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:00:06,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 40 proven. 181 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-14 00:00:06,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122584409] [2020-10-14 00:00:06,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:06,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 00:00:06,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396591188] [2020-10-14 00:00:06,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 00:00:06,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:06,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 00:00:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2020-10-14 00:00:06,867 INFO L87 Difference]: Start difference. First operand 187 states and 231 transitions. Second operand 28 states. [2020-10-14 00:00:07,371 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-14 00:00:07,630 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-14 00:00:10,176 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2020-10-14 00:00:10,685 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-14 00:00:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:12,033 INFO L93 Difference]: Finished difference Result 507 states and 626 transitions. [2020-10-14 00:00:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 00:00:12,034 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-14 00:00:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:12,039 INFO L225 Difference]: With dead ends: 507 [2020-10-14 00:00:12,039 INFO L226 Difference]: Without dead ends: 505 [2020-10-14 00:00:12,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1167, Invalid=3803, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 00:00:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-10-14 00:00:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 205. [2020-10-14 00:00:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-14 00:00:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 254 transitions. [2020-10-14 00:00:12,067 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 254 transitions. Word has length 66 [2020-10-14 00:00:12,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:12,067 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 254 transitions. [2020-10-14 00:00:12,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 00:00:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 254 transitions. [2020-10-14 00:00:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 00:00:12,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:12,068 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:12,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 00:00:12,069 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1538210192, now seen corresponding path program 5 times [2020-10-14 00:00:12,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:12,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535237067] [2020-10-14 00:00:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:19,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 00:00:19,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:19,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7595 [2020-10-14 00:00:19,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:19,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:19,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 00:00:19,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 00:00:19,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 00:00:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:22,427 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2020-10-14 00:00:23,477 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-14 00:00:23,719 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-10-14 00:00:24,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:24,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:24,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:00:24,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:24,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:24,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:00:24,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:24,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:00:24,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 53 proven. 270 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 00:00:24,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535237067] [2020-10-14 00:00:24,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:24,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 00:00:24,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822105864] [2020-10-14 00:00:24,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 00:00:24,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 00:00:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1995, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 00:00:24,329 INFO L87 Difference]: Start difference. First operand 205 states and 254 transitions. Second operand 50 states. [2020-10-14 00:00:28,085 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-14 00:00:28,250 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2020-10-14 00:00:28,400 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2020-10-14 00:00:28,641 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-14 00:00:32,444 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-14 00:00:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:33,137 INFO L93 Difference]: Finished difference Result 425 states and 527 transitions. [2020-10-14 00:00:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 00:00:33,138 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2020-10-14 00:00:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:33,141 INFO L225 Difference]: With dead ends: 425 [2020-10-14 00:00:33,141 INFO L226 Difference]: Without dead ends: 423 [2020-10-14 00:00:33,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3808 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2373, Invalid=9183, Unknown=0, NotChecked=0, Total=11556 [2020-10-14 00:00:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-14 00:00:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 130. [2020-10-14 00:00:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 00:00:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2020-10-14 00:00:33,169 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 66 [2020-10-14 00:00:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:33,169 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2020-10-14 00:00:33,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 00:00:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2020-10-14 00:00:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 00:00:33,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:33,170 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:33,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 00:00:33,170 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1091683570, now seen corresponding path program 6 times [2020-10-14 00:00:33,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:33,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168696599] [2020-10-14 00:00:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:40,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:40,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 00:00:40,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:40,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6829 [2020-10-14 00:00:40,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:40,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 00:00:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 00:00:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 00:00:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:43,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:43,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:43,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:43,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:43,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:43,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:00:43,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:43,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:43,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:00:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:00:43,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 36 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:00:43,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168696599] [2020-10-14 00:00:43,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:43,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 00:00:43,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121136924] [2020-10-14 00:00:43,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 00:00:43,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 00:00:43,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=2017, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 00:00:43,782 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand 52 states. [2020-10-14 00:00:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:46,625 INFO L93 Difference]: Finished difference Result 207 states and 259 transitions. [2020-10-14 00:00:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 00:00:46,625 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 66 [2020-10-14 00:00:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:46,627 INFO L225 Difference]: With dead ends: 207 [2020-10-14 00:00:46,627 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 00:00:46,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 00:00:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 00:00:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 132. [2020-10-14 00:00:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 00:00:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2020-10-14 00:00:46,648 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 66 [2020-10-14 00:00:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:46,649 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2020-10-14 00:00:46,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 00:00:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2020-10-14 00:00:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 00:00:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:46,649 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 00:00:46,650 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -874849145, now seen corresponding path program 1 times [2020-10-14 00:00:46,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:46,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301642011] [2020-10-14 00:00:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:46,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:46,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:54,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:54,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 00:00:54,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:00:54,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8291 [2020-10-14 00:00:54,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:54,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 00:00:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 00:00:54,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:55,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:55,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:55,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:55,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:55,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:55,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:55,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:55,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 00:00:55,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301642011] [2020-10-14 00:00:55,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:55,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 00:00:55,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801611138] [2020-10-14 00:00:55,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 00:00:55,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 00:00:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:00:55,185 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand 17 states. [2020-10-14 00:00:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:55,648 INFO L93 Difference]: Finished difference Result 235 states and 298 transitions. [2020-10-14 00:00:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 00:00:55,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-14 00:00:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:55,651 INFO L225 Difference]: With dead ends: 235 [2020-10-14 00:00:55,652 INFO L226 Difference]: Without dead ends: 213 [2020-10-14 00:00:55,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:00:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-14 00:00:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 140. [2020-10-14 00:00:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 00:00:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 171 transitions. [2020-10-14 00:00:55,673 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 171 transitions. Word has length 69 [2020-10-14 00:00:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:55,674 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 171 transitions. [2020-10-14 00:00:55,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 00:00:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 171 transitions. [2020-10-14 00:00:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 00:00:55,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:55,675 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:55,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 00:00:55,675 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:55,676 INFO L82 PathProgramCache]: Analyzing trace with hash 766447298, now seen corresponding path program 2 times [2020-10-14 00:00:55,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:55,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998366845] [2020-10-14 00:00:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:55,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:55,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:08,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:08,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 00:01:08,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:08,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12717 [2020-10-14 00:01:08,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:08,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:08,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 00:01:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 00:01:08,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 00:01:08,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:08,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:08,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:08,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:08,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:08,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:08,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:08,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:08,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:08,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:08,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:08,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 00:01:08,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998366845] [2020-10-14 00:01:08,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:08,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 00:01:08,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989170329] [2020-10-14 00:01:08,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 00:01:08,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 00:01:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:01:08,681 INFO L87 Difference]: Start difference. First operand 140 states and 171 transitions. Second operand 18 states. [2020-10-14 00:01:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:09,147 INFO L93 Difference]: Finished difference Result 248 states and 315 transitions. [2020-10-14 00:01:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 00:01:09,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-14 00:01:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:09,150 INFO L225 Difference]: With dead ends: 248 [2020-10-14 00:01:09,150 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 00:01:09,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:01:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 00:01:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 148. [2020-10-14 00:01:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 00:01:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 181 transitions. [2020-10-14 00:01:09,175 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 181 transitions. Word has length 73 [2020-10-14 00:01:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:09,176 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 181 transitions. [2020-10-14 00:01:09,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 00:01:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 181 transitions. [2020-10-14 00:01:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 00:01:09,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:09,177 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:09,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 00:01:09,177 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:09,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1230613373, now seen corresponding path program 3 times [2020-10-14 00:01:09,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:09,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357227961] [2020-10-14 00:01:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:09,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:09,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking...