/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:39:50,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:39:50,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:39:50,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:39:50,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:39:50,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:39:50,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:39:50,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:39:50,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:39:50,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:39:50,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:39:50,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:39:50,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:39:50,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:39:50,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:39:50,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:39:50,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:39:50,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:39:50,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:39:50,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:39:50,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:39:50,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:39:50,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:39:50,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:39:50,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:39:50,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:39:50,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:39:50,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:39:50,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:39:50,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:39:50,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:39:50,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:39:50,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:39:50,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:39:50,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:39:50,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:39:50,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:39:50,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:39:50,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:39:50,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:39:50,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:39:50,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:39:50,589 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:39:50,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:39:50,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:39:50,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:39:50,592 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:39:50,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:39:50,592 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:39:50,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:39:50,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:39:50,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:39:50,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:39:50,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:39:50,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:39:50,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:39:50,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:39:50,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:39:50,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:39:50,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:39:50,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:39:50,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:39:50,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:39:50,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:39:50,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:39:50,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:39:50,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:39:50,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:39:50,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:39:50,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:39:50,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:39:50,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:39:50,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:39:50,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:39:50,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:39:50,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:39:50,976 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:39:50,977 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-14 17:39:51,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bc7ac6a5/8404bf3ddb3e4432a4422a91d66a4e8d/FLAGa919248da [2020-10-14 17:39:51,490 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:39:51,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-14 17:39:51,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bc7ac6a5/8404bf3ddb3e4432a4422a91d66a4e8d/FLAGa919248da [2020-10-14 17:39:51,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bc7ac6a5/8404bf3ddb3e4432a4422a91d66a4e8d [2020-10-14 17:39:51,802 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:39:51,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:39:51,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:39:51,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:39:51,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:39:51,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:51" (1/1) ... [2020-10-14 17:39:51,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9182f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:51, skipping insertion in model container [2020-10-14 17:39:51,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:51" (1/1) ... [2020-10-14 17:39:51,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:39:51,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:39:52,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:39:52,116 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:39:52,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:39:52,165 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:39:52,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52 WrapperNode [2020-10-14 17:39:52,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:39:52,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:39:52,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:39:52,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:39:52,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... [2020-10-14 17:39:52,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... [2020-10-14 17:39:52,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... [2020-10-14 17:39:52,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... [2020-10-14 17:39:52,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... [2020-10-14 17:39:52,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... [2020-10-14 17:39:52,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... [2020-10-14 17:39:52,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:39:52,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:39:52,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:39:52,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:39:52,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:39:52,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:39:52,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:39:52,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:39:52,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:39:52,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:39:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:39:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:39:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:39:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:39:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-14 17:39:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:39:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:39:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:39:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:39:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:39:52,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:39:52,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:39:52,789 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:39:52,789 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-14 17:39:52,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:52 BoogieIcfgContainer [2020-10-14 17:39:52,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:39:52,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:39:52,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:39:52,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:39:52,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:39:51" (1/3) ... [2020-10-14 17:39:52,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e3445e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:52, skipping insertion in model container [2020-10-14 17:39:52,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:52" (2/3) ... [2020-10-14 17:39:52,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e3445e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:52, skipping insertion in model container [2020-10-14 17:39:52,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:52" (3/3) ... [2020-10-14 17:39:52,802 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2020-10-14 17:39:52,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:39:52,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:39:52,835 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:39:52,858 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:39:52,859 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:39:52,859 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:39:52,859 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:39:52,859 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:39:52,859 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:39:52,859 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:39:52,859 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:39:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-14 17:39:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:39:52,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:52,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:52,890 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:52,895 INFO L82 PathProgramCache]: Analyzing trace with hash 303510615, now seen corresponding path program 1 times [2020-10-14 17:39:52,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:52,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612722023] [2020-10-14 17:39:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:53,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:53,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 17:39:53,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:39:53,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-14 17:39:53,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:53,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:39:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:39:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:39:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:39:54,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:54,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:54,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:54,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:39:54,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:54,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:54,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:54,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:54,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:54,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:54,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612722023] [2020-10-14 17:39:54,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:39:54,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:39:54,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398140033] [2020-10-14 17:39:54,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:39:54,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:39:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:39:54,135 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-14 17:39:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:54,448 INFO L93 Difference]: Finished difference Result 91 states and 133 transitions. [2020-10-14 17:39:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:39:54,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 17:39:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:54,463 INFO L225 Difference]: With dead ends: 91 [2020-10-14 17:39:54,463 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 17:39:54,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:39:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 17:39:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 17:39:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 17:39:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-14 17:39:54,535 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2020-10-14 17:39:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:54,536 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-14 17:39:54,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:39:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-14 17:39:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:39:54,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:54,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:54,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:39:54,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 545309699, now seen corresponding path program 1 times [2020-10-14 17:39:54,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:54,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32622085] [2020-10-14 17:39:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:54,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:59,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:39:59,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:39:59,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:39:59,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:59,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:39:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:39:59,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:39:59,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:39:59,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:59,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:59,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:59,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:59,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:39:59,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:59,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:59,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:39:59,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32622085] [2020-10-14 17:39:59,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:39:59,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:39:59,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339552208] [2020-10-14 17:39:59,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:39:59,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:39:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:39:59,634 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 5 states. [2020-10-14 17:39:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:59,800 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2020-10-14 17:39:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:39:59,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-14 17:39:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:59,803 INFO L225 Difference]: With dead ends: 73 [2020-10-14 17:39:59,803 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 17:39:59,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:39:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 17:39:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-14 17:39:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 17:39:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-14 17:39:59,813 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 26 [2020-10-14 17:39:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:59,814 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-14 17:39:59,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:39:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-14 17:39:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:39:59,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:59,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:59,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:39:59,817 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1611827335, now seen corresponding path program 1 times [2020-10-14 17:39:59,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:59,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780797056] [2020-10-14 17:39:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:59,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:01,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:04,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:04,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 17:40:04,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:40:04,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:40:04,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:04,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:40:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:04,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:40:04,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:04,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:04,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:04,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:04,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:04,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:04,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:40:04,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:04,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:04,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:04,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 17:40:04,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780797056] [2020-10-14 17:40:04,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:04,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:40:04,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899118956] [2020-10-14 17:40:04,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:40:04,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:40:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:40:04,911 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 6 states. [2020-10-14 17:40:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:05,150 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-14 17:40:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:40:05,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-14 17:40:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:05,153 INFO L225 Difference]: With dead ends: 75 [2020-10-14 17:40:05,153 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 17:40:05,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:40:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 17:40:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 17:40:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 17:40:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-14 17:40:05,173 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 36 [2020-10-14 17:40:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:05,176 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-14 17:40:05,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:40:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-14 17:40:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 17:40:05,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:05,178 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:05,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:40:05,179 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:05,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1826760493, now seen corresponding path program 2 times [2020-10-14 17:40:05,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:05,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142488681] [2020-10-14 17:40:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:05,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:05,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:05,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:06,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:08,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:08,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:10,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:40:10,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:40:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:40:10,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:10,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:40:10,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:10,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 17:40:10,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:10,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:10,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:10,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:10,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 17:40:10,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:10,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:10,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:10,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142488681] [2020-10-14 17:40:10,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:10,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:40:10,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730520526] [2020-10-14 17:40:10,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:40:10,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:10,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:40:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:40:10,850 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 16 states. [2020-10-14 17:40:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:11,453 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-14 17:40:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:40:11,454 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 17:40:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:11,455 INFO L225 Difference]: With dead ends: 87 [2020-10-14 17:40:11,455 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 17:40:11,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:40:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 17:40:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-14 17:40:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 17:40:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-14 17:40:11,469 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 48 [2020-10-14 17:40:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:11,469 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-14 17:40:11,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:40:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-14 17:40:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 17:40:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:11,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:11,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:40:11,472 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1922554005, now seen corresponding path program 3 times [2020-10-14 17:40:11,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:11,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063742619] [2020-10-14 17:40:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:11,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:11,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:11,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:16,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:16,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:40:16,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:16,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:40:16,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:16,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:16,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:40:16,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:16,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:40:16,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:16,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:16,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:16,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:16,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:16,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:16,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:16,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:16,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:40:16,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063742619] [2020-10-14 17:40:16,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:16,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:40:16,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492612771] [2020-10-14 17:40:16,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:40:16,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:40:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:40:16,586 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 10 states. [2020-10-14 17:40:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:17,009 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2020-10-14 17:40:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:40:17,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-14 17:40:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:17,011 INFO L225 Difference]: With dead ends: 158 [2020-10-14 17:40:17,011 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 17:40:17,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:40:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 17:40:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2020-10-14 17:40:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 17:40:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-14 17:40:17,025 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 50 [2020-10-14 17:40:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:17,026 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-14 17:40:17,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:40:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-14 17:40:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 17:40:17,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:17,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:17,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:40:17,028 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1894717483, now seen corresponding path program 4 times [2020-10-14 17:40:17,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:17,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732892825] [2020-10-14 17:40:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:17,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:17,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:17,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:22,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:22,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:40:22,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:22,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:40:22,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:22,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:22,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:40:22,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:22,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:40:22,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:22,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:22,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:22,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:22,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:22,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:22,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:22,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:40:22,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732892825] [2020-10-14 17:40:22,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:22,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:40:22,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193186274] [2020-10-14 17:40:22,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:40:22,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:40:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:40:22,180 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 10 states. [2020-10-14 17:40:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:22,639 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2020-10-14 17:40:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:40:22,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-14 17:40:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:22,640 INFO L225 Difference]: With dead ends: 91 [2020-10-14 17:40:22,641 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 17:40:22,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:40:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 17:40:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 17:40:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 17:40:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-14 17:40:22,658 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 50 [2020-10-14 17:40:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:22,659 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-14 17:40:22,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:40:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-14 17:40:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:40:22,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:22,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:22,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:40:22,663 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash 620869857, now seen corresponding path program 5 times [2020-10-14 17:40:22,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:22,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283369883] [2020-10-14 17:40:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:22,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:22,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:23,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:24,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:24,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:25,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:27,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:27,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:27,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:40:27,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:40:27,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5239 [2020-10-14 17:40:27,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:27,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 17:40:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 17:40:27,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:28,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:28,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:28,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:28,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:28,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:28,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:28,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:28,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:28,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:28,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283369883] [2020-10-14 17:40:28,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:28,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:40:28,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693219483] [2020-10-14 17:40:28,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:40:28,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:40:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:40:28,833 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 23 states. [2020-10-14 17:40:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:29,827 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2020-10-14 17:40:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:40:29,831 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-10-14 17:40:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:29,832 INFO L225 Difference]: With dead ends: 109 [2020-10-14 17:40:29,832 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 17:40:29,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:40:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 17:40:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-10-14 17:40:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 17:40:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2020-10-14 17:40:29,852 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 60 [2020-10-14 17:40:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:29,853 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2020-10-14 17:40:29,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:40:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2020-10-14 17:40:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:40:29,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:29,854 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:29,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:40:29,855 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1012863969, now seen corresponding path program 6 times [2020-10-14 17:40:29,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:29,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261308423] [2020-10-14 17:40:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:29,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:29,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:29,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:34,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:34,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:40:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:34,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:34,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:34,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:34,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:34,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:34,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:34,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:34,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:40:34,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261308423] [2020-10-14 17:40:34,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:34,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:40:34,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549100963] [2020-10-14 17:40:34,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:40:34,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:34,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:40:34,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:40:34,988 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand 12 states. [2020-10-14 17:40:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:35,492 INFO L93 Difference]: Finished difference Result 196 states and 219 transitions. [2020-10-14 17:40:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:40:35,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-14 17:40:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:35,494 INFO L225 Difference]: With dead ends: 196 [2020-10-14 17:40:35,495 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 17:40:35,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:40:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 17:40:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2020-10-14 17:40:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 17:40:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2020-10-14 17:40:35,508 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 62 [2020-10-14 17:40:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:35,508 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2020-10-14 17:40:35,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:40:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2020-10-14 17:40:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:40:35,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:35,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:35,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:40:35,510 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash -215540513, now seen corresponding path program 7 times [2020-10-14 17:40:35,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:35,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289173048] [2020-10-14 17:40:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:35,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:35,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:40,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:40,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:40:40,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:40,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:40:40,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:40,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:40,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:40:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:40:40,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:40,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:40,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:40,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:40,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:40,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:40,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:40,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:40,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:40,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:40:40,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289173048] [2020-10-14 17:40:40,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:40,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:40:40,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324638987] [2020-10-14 17:40:40,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:40:40,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:40:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:40:40,639 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand 12 states. [2020-10-14 17:40:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:41,151 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2020-10-14 17:40:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:40:41,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-14 17:40:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:41,154 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:40:41,154 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 17:40:41,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:40:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 17:40:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-14 17:40:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 17:40:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-14 17:40:41,165 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 62 [2020-10-14 17:40:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:41,165 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-14 17:40:41,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:40:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-14 17:40:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 17:40:41,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:41,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:41,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:40:41,167 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:41,168 INFO L82 PathProgramCache]: Analyzing trace with hash -13816683, now seen corresponding path program 8 times [2020-10-14 17:40:41,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:41,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298728743] [2020-10-14 17:40:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:41,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:41,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:44,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:45,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:46,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:46,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 17:40:46,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:40:46,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:40:46,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:46,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:46,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 17:40:46,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:46,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 17:40:46,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:51,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:51,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:51,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:51,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:51,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:51,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:51,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:51,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:51,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:51,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298728743] [2020-10-14 17:40:51,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:51,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 17:40:51,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013609165] [2020-10-14 17:40:51,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 17:40:51,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 17:40:51,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2621, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:40:51,468 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 53 states. [2020-10-14 17:40:53,050 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2020-10-14 17:40:54,963 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 17:40:56,098 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 17:40:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:58,842 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2020-10-14 17:40:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:40:58,843 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2020-10-14 17:40:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:58,844 INFO L225 Difference]: With dead ends: 137 [2020-10-14 17:40:58,844 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 17:40:58,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=344, Invalid=6136, Unknown=0, NotChecked=0, Total=6480 [2020-10-14 17:40:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 17:40:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 119. [2020-10-14 17:40:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 17:40:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-10-14 17:40:58,863 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 72 [2020-10-14 17:40:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:58,863 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-10-14 17:40:58,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 17:40:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-10-14 17:40:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 17:40:58,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:58,865 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:58,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:40:58,865 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash 537465555, now seen corresponding path program 9 times [2020-10-14 17:40:58,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:58,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120094550] [2020-10-14 17:40:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:58,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:58,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:58,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:59,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:03,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:03,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 17:41:03,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:03,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:41:03,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:03,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:41:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:41:03,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:04,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:04,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:04,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:04,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:04,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:04,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:04,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:04,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:04,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:04,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:04,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:41:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:41:04,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120094550] [2020-10-14 17:41:04,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:04,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:41:04,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100755720] [2020-10-14 17:41:04,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:41:04,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:04,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:41:04,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:41:04,047 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 14 states. [2020-10-14 17:41:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:04,895 INFO L93 Difference]: Finished difference Result 234 states and 257 transitions. [2020-10-14 17:41:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:41:04,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-14 17:41:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:04,898 INFO L225 Difference]: With dead ends: 234 [2020-10-14 17:41:04,898 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 17:41:04,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:41:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 17:41:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2020-10-14 17:41:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 17:41:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2020-10-14 17:41:04,924 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 74 [2020-10-14 17:41:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:04,926 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2020-10-14 17:41:04,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:41:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2020-10-14 17:41:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 17:41:04,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:04,938 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:04,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:41:04,939 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:04,942 INFO L82 PathProgramCache]: Analyzing trace with hash 257328019, now seen corresponding path program 10 times [2020-10-14 17:41:04,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:04,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449377267] [2020-10-14 17:41:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:04,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:05,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:09,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:09,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 17:41:09,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:41:09,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:09,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:41:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:41:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:10,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:10,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:10,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:10,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:10,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:10,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:10,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:10,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:10,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:41:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:41:10,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449377267] [2020-10-14 17:41:10,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:10,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:41:10,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645323630] [2020-10-14 17:41:10,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:41:10,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:10,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:41:10,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:41:10,103 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 14 states. [2020-10-14 17:41:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:10,902 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-10-14 17:41:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:41:10,903 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-14 17:41:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:10,904 INFO L225 Difference]: With dead ends: 131 [2020-10-14 17:41:10,904 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 17:41:10,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:41:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 17:41:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-14 17:41:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 17:41:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-10-14 17:41:10,919 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 74 [2020-10-14 17:41:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:10,922 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-10-14 17:41:10,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:41:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-10-14 17:41:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 17:41:10,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:10,931 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:10,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:41:10,931 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 96830025, now seen corresponding path program 11 times [2020-10-14 17:41:10,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:10,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385047713] [2020-10-14 17:41:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:10,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:11,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:11,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:13,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:15,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:15,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-14 17:41:15,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:24,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:24,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:24,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:24,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:24,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385047713] [2020-10-14 17:41:24,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:24,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 17:41:24,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272966757] [2020-10-14 17:41:24,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 17:41:24,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 17:41:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3513, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 17:41:24,197 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 61 states. [2020-10-14 17:41:26,441 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-10-14 17:41:27,080 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-14 17:41:29,487 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-14 17:41:30,465 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 17:41:30,997 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-14 17:41:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:34,481 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-14 17:41:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 17:41:34,482 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 84 [2020-10-14 17:41:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:34,484 INFO L225 Difference]: With dead ends: 159 [2020-10-14 17:41:34,484 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 17:41:34,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=399, Invalid=8913, Unknown=0, NotChecked=0, Total=9312 [2020-10-14 17:41:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 17:41:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 139. [2020-10-14 17:41:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 17:41:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2020-10-14 17:41:34,499 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 84 [2020-10-14 17:41:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:34,500 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2020-10-14 17:41:34,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 17:41:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2020-10-14 17:41:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 17:41:34,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:34,501 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:34,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:41:34,502 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:34,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1077830777, now seen corresponding path program 12 times [2020-10-14 17:41:34,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:34,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25691504] [2020-10-14 17:41:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:34,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:34,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:34,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:39,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:39,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 17:41:39,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:39,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:41:39,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:39,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:41:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:41:39,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:39,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:39,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:39,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:39,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:39,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:39,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:41:39,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:39,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:39,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:41:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:41:39,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25691504] [2020-10-14 17:41:39,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:39,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:41:39,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125543168] [2020-10-14 17:41:39,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:41:39,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:39,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:41:39,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:41:39,752 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 16 states. [2020-10-14 17:41:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:40,959 INFO L93 Difference]: Finished difference Result 272 states and 295 transitions. [2020-10-14 17:41:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:41:40,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-14 17:41:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:40,962 INFO L225 Difference]: With dead ends: 272 [2020-10-14 17:41:40,962 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 17:41:40,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:41:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 17:41:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2020-10-14 17:41:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-14 17:41:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-14 17:41:40,981 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 86 [2020-10-14 17:41:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:40,981 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-14 17:41:40,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:41:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-14 17:41:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 17:41:40,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:40,982 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:40,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:41:40,983 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash -895595449, now seen corresponding path program 13 times [2020-10-14 17:41:40,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:40,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609047243] [2020-10-14 17:41:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:41,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:45,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:45,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 17:41:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:41:45,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:45,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:41:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:41:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:46,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:46,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:46,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:46,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:41:46,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609047243] [2020-10-14 17:41:46,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:46,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:41:46,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144380889] [2020-10-14 17:41:46,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:41:46,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:41:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:41:46,206 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 16 states. [2020-10-14 17:41:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:47,067 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-10-14 17:41:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:41:47,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-14 17:41:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:47,069 INFO L225 Difference]: With dead ends: 151 [2020-10-14 17:41:47,069 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 17:41:47,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:41:47,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 17:41:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-14 17:41:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 17:41:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2020-10-14 17:41:47,078 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 86 [2020-10-14 17:41:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:47,078 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2020-10-14 17:41:47,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:41:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2020-10-14 17:41:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 17:41:47,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:47,079 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:47,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:41:47,079 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:47,080 INFO L82 PathProgramCache]: Analyzing trace with hash 380353021, now seen corresponding path program 14 times [2020-10-14 17:41:47,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:47,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484441502] [2020-10-14 17:41:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:48,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:50,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:52,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:52,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 17:41:52,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:41:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:41:52,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:52,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-14 17:41:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:41:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 17:41:52,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:55,481 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-10-14 17:41:57,240 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-14 17:41:57,499 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-14 17:41:57,765 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-14 17:41:58,032 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-14 17:41:58,285 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-14 17:41:58,535 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-14 17:41:59,082 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2020-10-14 17:42:04,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:04,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:04,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:04,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:04,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:04,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:04,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:04,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:04,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:04,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:04,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:04,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:42:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 12 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:04,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484441502] [2020-10-14 17:42:04,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:04,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-14 17:42:04,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519242216] [2020-10-14 17:42:04,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-14 17:42:04,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:04,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-14 17:42:04,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=5675, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 17:42:04,768 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 78 states. [2020-10-14 17:42:05,123 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 3 [2020-10-14 17:42:05,625 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 15 [2020-10-14 17:42:07,233 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-14 17:42:07,690 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-14 17:42:09,025 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-14 17:42:09,396 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-14 17:42:09,843 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 17:42:10,539 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-14 17:42:13,087 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-14 17:42:13,593 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-14 17:42:14,047 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-14 17:42:14,777 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-14 17:42:15,495 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2020-10-14 17:42:16,559 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-14 17:42:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:24,142 INFO L93 Difference]: Finished difference Result 194 states and 210 transitions. [2020-10-14 17:42:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-14 17:42:24,143 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 96 [2020-10-14 17:42:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:24,145 INFO L225 Difference]: With dead ends: 194 [2020-10-14 17:42:24,145 INFO L226 Difference]: Without dead ends: 189 [2020-10-14 17:42:24,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=906, Invalid=12666, Unknown=0, NotChecked=0, Total=13572 [2020-10-14 17:42:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-14 17:42:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 159. [2020-10-14 17:42:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 17:42:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2020-10-14 17:42:24,167 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 96 [2020-10-14 17:42:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:24,167 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2020-10-14 17:42:24,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-14 17:42:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2020-10-14 17:42:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 17:42:24,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:24,169 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:24,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:42:24,169 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash -211057093, now seen corresponding path program 15 times [2020-10-14 17:42:24,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:24,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649471966] [2020-10-14 17:42:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:24,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:24,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:24,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:24,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:25,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:29,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:42:29,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:42:29,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:29,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:29,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:29,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:29,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:29,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:29,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:29,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:29,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:29,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:42:29,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649471966] [2020-10-14 17:42:29,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:29,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:42:29,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439793732] [2020-10-14 17:42:29,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:42:29,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:42:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:42:29,488 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand 18 states. [2020-10-14 17:42:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:30,877 INFO L93 Difference]: Finished difference Result 343 states and 369 transitions. [2020-10-14 17:42:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:42:30,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 98 [2020-10-14 17:42:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:30,880 INFO L225 Difference]: With dead ends: 343 [2020-10-14 17:42:30,881 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 17:42:30,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:42:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 17:42:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2020-10-14 17:42:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 17:42:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2020-10-14 17:42:30,897 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 98 [2020-10-14 17:42:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:30,898 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2020-10-14 17:42:30,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:42:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2020-10-14 17:42:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 17:42:30,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:30,899 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:30,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:42:30,900 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:30,900 INFO L82 PathProgramCache]: Analyzing trace with hash -576751877, now seen corresponding path program 16 times [2020-10-14 17:42:30,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:30,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471856607] [2020-10-14 17:42:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:30,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:30,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:31,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:35,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:35,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 17:42:35,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:42:35,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:42:35,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:35,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:35,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:42:35,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:42:35,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:42:35,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:36,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:36,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:36,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:36,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:36,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:36,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:36,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:36,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:36,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:42:36,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471856607] [2020-10-14 17:42:36,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:36,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:42:36,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270367529] [2020-10-14 17:42:36,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:42:36,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:42:36,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:42:36,252 INFO L87 Difference]: Start difference. First operand 164 states and 174 transitions. Second operand 18 states. [2020-10-14 17:42:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:37,911 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2020-10-14 17:42:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:42:37,913 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 98 [2020-10-14 17:42:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:37,914 INFO L225 Difference]: With dead ends: 171 [2020-10-14 17:42:37,914 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 17:42:37,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:42:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 17:42:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-14 17:42:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 17:42:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2020-10-14 17:42:37,927 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 98 [2020-10-14 17:42:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:37,927 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2020-10-14 17:42:37,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:42:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2020-10-14 17:42:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 17:42:37,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:37,928 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:37,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:42:37,929 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash -482290767, now seen corresponding path program 17 times [2020-10-14 17:42:37,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:37,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032402877] [2020-10-14 17:42:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:38,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:41,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:42,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:42,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 17:42:42,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:42:42,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 17:42:42,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:42,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:42,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 92 [2020-10-14 17:42:42,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:42:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 17:42:42,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:44,569 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-14 17:42:44,735 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-14 17:42:44,916 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-14 17:42:45,122 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-14 17:42:45,344 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-14 17:42:45,574 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-14 17:42:45,788 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-14 17:42:45,984 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-14 17:42:46,270 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-14 17:42:46,587 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-14 17:42:46,884 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-14 17:42:47,199 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-14 17:42:47,521 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-14 17:42:47,839 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-14 17:42:48,150 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-14 17:42:48,528 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-10-14 17:42:48,803 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-14 17:42:49,106 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-14 17:42:49,468 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-14 17:42:49,786 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-14 17:42:50,066 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2020-10-14 17:42:50,459 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 21 [2020-10-14 17:42:50,880 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2020-10-14 17:42:51,242 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-10-14 17:42:51,633 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-10-14 17:42:51,996 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2020-10-14 17:42:52,370 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-10-14 17:42:52,762 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-14 17:42:53,134 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-10-14 17:42:53,555 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-14 17:42:53,951 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-10-14 17:42:54,378 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-14 17:42:54,778 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-14 17:42:55,210 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-14 17:42:55,638 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-14 17:42:57,087 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-10-14 17:42:57,523 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-14 17:42:57,931 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-14 17:42:58,340 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-10-14 17:42:59,356 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2020-10-14 17:42:59,955 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-14 17:43:00,593 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-14 17:43:01,270 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-14 17:43:01,916 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-14 17:43:02,475 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-14 17:43:03,028 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-14 17:43:03,579 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-14 17:43:04,193 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-14 17:43:04,776 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-14 17:43:05,210 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-14 17:43:11,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:11,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:11,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:11,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:11,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:43:11,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032402877] [2020-10-14 17:43:11,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:11,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-14 17:43:11,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016166787] [2020-10-14 17:43:11,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-14 17:43:11,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-14 17:43:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=5824, Unknown=0, NotChecked=0, Total=6480 [2020-10-14 17:43:11,702 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 81 states. [2020-10-14 17:43:14,627 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-10-14 17:43:17,055 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-14 17:43:17,968 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-14 17:43:18,693 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-14 17:43:19,806 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-10-14 17:43:20,330 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-14 17:43:22,988 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 67 [2020-10-14 17:43:23,643 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2020-10-14 17:43:24,600 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 78 [2020-10-14 17:43:25,453 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-14 17:43:26,320 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2020-10-14 17:43:27,000 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-14 17:43:27,505 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-14 17:43:28,082 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-14 17:43:28,689 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-14 17:43:29,351 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-14 17:43:29,988 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-14 17:43:30,701 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-14 17:43:31,303 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-10-14 17:43:31,744 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-14 17:43:32,560 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-14 17:43:34,160 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-14 17:43:34,961 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-14 17:43:35,568 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-14 17:43:36,887 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-14 17:43:37,482 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-10-14 17:43:38,225 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-10-14 17:43:38,835 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2020-10-14 17:43:39,498 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-10-14 17:43:41,843 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-10-14 17:43:42,320 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-10-14 17:43:42,768 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2020-10-14 17:43:43,215 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-14 17:43:43,698 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-14 17:43:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:47,752 INFO L93 Difference]: Finished difference Result 257 states and 274 transitions. [2020-10-14 17:43:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-14 17:43:47,756 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 108 [2020-10-14 17:43:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:47,762 INFO L225 Difference]: With dead ends: 257 [2020-10-14 17:43:47,762 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 17:43:47,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 13 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4247 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=1597, Invalid=13903, Unknown=0, NotChecked=0, Total=15500 [2020-10-14 17:43:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 17:43:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 183. [2020-10-14 17:43:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-14 17:43:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 196 transitions. [2020-10-14 17:43:47,802 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 196 transitions. Word has length 108 [2020-10-14 17:43:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:47,802 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 196 transitions. [2020-10-14 17:43:47,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-14 17:43:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 196 transitions. [2020-10-14 17:43:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 17:43:47,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:47,804 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:47,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:43:47,805 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1059574511, now seen corresponding path program 18 times [2020-10-14 17:43:47,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:47,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055643664] [2020-10-14 17:43:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:47,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking...