/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.3 --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 language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:47:57,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:47:57,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:47:57,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:47:57,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:47:57,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:47:57,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:47:57,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:47:57,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:47:57,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:47:57,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:47:57,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:47:57,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:47:57,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:47:57,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:47:57,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:47:57,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:47:57,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:47:57,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:47:57,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:47:57,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:47:57,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:47:57,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:47:57,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:47:57,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:47:57,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:47:57,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:47:57,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:47:57,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:47:57,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:47:57,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:47:57,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:47:57,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:47:57,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:47:57,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:47:57,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:47:57,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:47:57,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:47:57,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:47:57,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:47:57,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:47:57,646 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 [2020-10-29 09:47:57,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:47:57,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:47:57,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:47:57,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:47:57,675 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:47:57,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:47:57,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:47:57,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:47:57,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:47:57,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:47:57,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:47:57,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:47:57,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:47:57,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:47:57,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:47:57,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:47:57,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:47:57,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:47:57,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:47:57,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:47:57,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:47:57,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:47:57,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:47:57,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:47:57,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:47:57,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:47:57,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:47:57,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:47:57,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:47:57,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:47:58,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:47:58,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:47:58,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:47:58,062 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:47:58,063 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:47:58,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-29 09:47:58,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5c5c26d0/2fa3497808764f768d205210ed88e11f/FLAG54c72275c [2020-10-29 09:47:58,743 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:47:58,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-29 09:47:58,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5c5c26d0/2fa3497808764f768d205210ed88e11f/FLAG54c72275c [2020-10-29 09:47:59,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5c5c26d0/2fa3497808764f768d205210ed88e11f [2020-10-29 09:47:59,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:47:59,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:47:59,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:47:59,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:47:59,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:47:59,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440a350e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59, skipping insertion in model container [2020-10-29 09:47:59,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:47:59,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:47:59,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:47:59,314 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:47:59,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:47:59,348 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:47:59,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59 WrapperNode [2020-10-29 09:47:59,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:47:59,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:47:59,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:47:59,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:47:59,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (1/1) ... [2020-10-29 09:47:59,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:47:59,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:47:59,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:47:59,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:47:59,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (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 [2020-10-29 09:47:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:47:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:47:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:47:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:47:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:47:59,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:47:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:47:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:47:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:47:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 09:47:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:47:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:47:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:47:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:47:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:47:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:47:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:47:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:47:59,937 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:47:59,937 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 09:47:59,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:47:59 BoogieIcfgContainer [2020-10-29 09:47:59,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:47:59,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:47:59,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:47:59,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:47:59,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:47:59" (1/3) ... [2020-10-29 09:47:59,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bd5757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:47:59, skipping insertion in model container [2020-10-29 09:47:59,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:47:59" (2/3) ... [2020-10-29 09:47:59,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bd5757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:47:59, skipping insertion in model container [2020-10-29 09:47:59,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:47:59" (3/3) ... [2020-10-29 09:47:59,954 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de42.c [2020-10-29 09:47:59,967 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:47:59,974 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:48:00,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:48:00,057 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:48:00,057 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:48:00,057 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:48:00,057 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:48:00,058 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:48:00,058 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:48:00,058 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:48:00,058 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:48:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-29 09:48:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:48:00,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:00,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:00,093 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:00,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1165252201, now seen corresponding path program 1 times [2020-10-29 09:48:00,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:00,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997051679] [2020-10-29 09:48:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:00,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:00,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:00,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:00,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:48:00,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:00,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-29 09:48:00,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:00,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:00,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:00,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:48:00,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:48:01,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:01,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:01,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:01,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:01,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:01,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:48:01,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:01,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:01,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:01,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:01,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:01,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:01,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997051679] [2020-10-29 09:48:01,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:01,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:48:01,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487186108] [2020-10-29 09:48:01,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:01,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:01,229 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 8 states. [2020-10-29 09:48:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:01,672 INFO L93 Difference]: Finished difference Result 63 states and 95 transitions. [2020-10-29 09:48:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:01,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-29 09:48:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:01,683 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:48:01,683 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:48:01,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:48:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:48:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-29 09:48:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:48:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-10-29 09:48:01,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 16 [2020-10-29 09:48:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:01,730 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-10-29 09:48:01,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-10-29 09:48:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:48:01,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:01,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:01,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:48:01,732 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 51209556, now seen corresponding path program 1 times [2020-10-29 09:48:01,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:01,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214423879] [2020-10-29 09:48:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:01,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:01,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:01,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:48:01,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:01,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 09:48:01,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:01,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:48:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:48:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:48:01,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:01,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:01,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:01,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:01,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:01,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:01,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:01,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214423879] [2020-10-29 09:48:01,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:01,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:48:01,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545201280] [2020-10-29 09:48:01,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:48:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:48:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:48:01,857 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 4 states. [2020-10-29 09:48:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:01,934 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-10-29 09:48:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:48:01,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-29 09:48:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:01,936 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:48:01,936 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:48:01,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:48:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:48:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:48:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-10-29 09:48:01,946 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2020-10-29 09:48:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:01,947 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-10-29 09:48:01,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:48:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-10-29 09:48:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:48:01,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:01,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:01,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:48:01,949 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash 589216965, now seen corresponding path program 1 times [2020-10-29 09:48:01,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:01,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211196506] [2020-10-29 09:48:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:01,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:01,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:48:02,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-29 09:48:02,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:48:02,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:02,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:48:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:48:02,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:02,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:02,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:48:02,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:02,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:02,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:02,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:48:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:02,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211196506] [2020-10-29 09:48:02,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:02,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:48:02,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007715645] [2020-10-29 09:48:02,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:48:02,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:48:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:48:02,163 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 4 states. [2020-10-29 09:48:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:02,262 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-29 09:48:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:48:02,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-29 09:48:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:02,264 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:48:02,264 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:48:02,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:48:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-29 09:48:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:48:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-29 09:48:02,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-10-29 09:48:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:02,288 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-29 09:48:02,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:48:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-10-29 09:48:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:48:02,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:02,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:02,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:48:02,290 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:02,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:02,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1054944051, now seen corresponding path program 1 times [2020-10-29 09:48:02,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:02,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562059619] [2020-10-29 09:48:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:48:02,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:02,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-29 09:48:02,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:48:02,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:02,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:02,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:02,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:02,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:02,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:02,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:02,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:02,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562059619] [2020-10-29 09:48:02,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:02,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:02,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335097442] [2020-10-29 09:48:02,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:02,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:02,518 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2020-10-29 09:48:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:02,653 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2020-10-29 09:48:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:02,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-29 09:48:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:02,654 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:48:02,654 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:48:02,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:48:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-29 09:48:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:48:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-10-29 09:48:02,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 17 [2020-10-29 09:48:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:02,665 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-10-29 09:48:02,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-10-29 09:48:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:48:02,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:02,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:02,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:48:02,667 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:02,667 INFO L82 PathProgramCache]: Analyzing trace with hash -510729189, now seen corresponding path program 1 times [2020-10-29 09:48:02,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:02,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286356967] [2020-10-29 09:48:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:48:02,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:02,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-29 09:48:02,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:48:02,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:02,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:02,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:02,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:02,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:48:02,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286356967] [2020-10-29 09:48:02,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:48:02,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:48:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234284514] [2020-10-29 09:48:02,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:02,833 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 5 states. [2020-10-29 09:48:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:02,962 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-29 09:48:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:02,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-29 09:48:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:02,963 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:48:02,964 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:48:02,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:48:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:48:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:48:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-29 09:48:02,971 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2020-10-29 09:48:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:02,972 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-29 09:48:02,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-29 09:48:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:48:02,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:02,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:02,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:48:02,973 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:02,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -49128531, now seen corresponding path program 1 times [2020-10-29 09:48:02,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:02,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486881907] [2020-10-29 09:48:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:03,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:03,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:03,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:03,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:48:03,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-29 09:48:03,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:03,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:48:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:48:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:03,820 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-29 09:48:03,982 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-29 09:48:04,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:04,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:04,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:04,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:04,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:04,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:04,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:04,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:04,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:04,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486881907] [2020-10-29 09:48:04,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:04,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:48:04,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445128407] [2020-10-29 09:48:04,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:48:04,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:48:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:48:04,220 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 10 states. [2020-10-29 09:48:04,426 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 09:48:04,660 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-29 09:48:05,006 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-29 09:48:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:05,373 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-10-29 09:48:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:48:05,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-29 09:48:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:05,375 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:48:05,375 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:48:05,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:48:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:48:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 09:48:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:48:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-29 09:48:05,383 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 18 [2020-10-29 09:48:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:05,383 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-29 09:48:05,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:48:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-29 09:48:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:48:05,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:05,384 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:05,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:48:05,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 416598555, now seen corresponding path program 2 times [2020-10-29 09:48:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:05,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416831640] [2020-10-29 09:48:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:05,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:05,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:05,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:48:05,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-29 09:48:05,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:05,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:48:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:48:05,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:05,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:05,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:05,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:05,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:05,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:48:05,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:05,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:05,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:05,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416831640] [2020-10-29 09:48:05,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:05,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:48:05,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305337569] [2020-10-29 09:48:05,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:05,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:05,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:05,624 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2020-10-29 09:48:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:05,879 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-10-29 09:48:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:48:05,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:48:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:05,880 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:48:05,880 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:48:05,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:48:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-29 09:48:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:48:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-10-29 09:48:05,890 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 18 [2020-10-29 09:48:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:05,890 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-10-29 09:48:05,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-10-29 09:48:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:48:05,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:05,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:05,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:48:05,892 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1713404324, now seen corresponding path program 1 times [2020-10-29 09:48:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:05,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359666955] [2020-10-29 09:48:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:05,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:05,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:06,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:06,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:48:06,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:06,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-29 09:48:06,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:06,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:48:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:48:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:06,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:06,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:06,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:06,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:06,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:06,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:06,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:06,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:48:06,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359666955] [2020-10-29 09:48:06,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:06,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:48:06,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682385637] [2020-10-29 09:48:06,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:48:06,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:06,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:48:06,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:48:06,089 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 5 states. [2020-10-29 09:48:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:06,224 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-10-29 09:48:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:48:06,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-29 09:48:06,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:06,226 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:48:06,226 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:48:06,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:48:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:48:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:48:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2020-10-29 09:48:06,237 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 19 [2020-10-29 09:48:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:06,237 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2020-10-29 09:48:06,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:48:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2020-10-29 09:48:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:48:06,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:06,239 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:06,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:48:06,239 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1636997573, now seen corresponding path program 2 times [2020-10-29 09:48:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:06,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273167856] [2020-10-29 09:48:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:06,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:06,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:48:06,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:06,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-29 09:48:06,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:06,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:06,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:06,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:06,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:48:06,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:06,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:06,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:06,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:06,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:06,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:06,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:06,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:06,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:06,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273167856] [2020-10-29 09:48:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062568533] [2020-10-29 09:48:06,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:06,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:06,579 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand 7 states. [2020-10-29 09:48:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:06,887 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2020-10-29 09:48:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:06,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-29 09:48:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:06,889 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:48:06,889 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:48:06,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:48:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-29 09:48:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:48:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2020-10-29 09:48:06,907 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 19 [2020-10-29 09:48:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:06,907 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2020-10-29 09:48:06,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2020-10-29 09:48:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:06,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:06,908 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] [2020-10-29 09:48:06,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:48:06,909 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1649703957, now seen corresponding path program 1 times [2020-10-29 09:48:06,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:06,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189030436] [2020-10-29 09:48:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:06,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:07,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:07,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:07,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-29 09:48:07,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:07,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:48:07,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:07,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:48:07,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:08,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:08,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:08,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:08,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:08,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:08,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:08,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:08,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:08,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:08,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:08,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:48:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189030436] [2020-10-29 09:48:08,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:08,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:48:08,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566476915] [2020-10-29 09:48:08,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:48:08,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:08,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:48:08,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:08,050 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 11 states. [2020-10-29 09:48:11,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:11,193 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2020-10-29 09:48:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:48:11,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:48:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:11,195 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:48:11,195 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:48:11,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:48:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:48:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-29 09:48:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:48:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2020-10-29 09:48:11,207 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 20 [2020-10-29 09:48:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:11,207 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2020-10-29 09:48:11,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:48:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2020-10-29 09:48:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:11,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:11,208 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:11,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:48:11,209 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:11,209 INFO L82 PathProgramCache]: Analyzing trace with hash 517347981, now seen corresponding path program 2 times [2020-10-29 09:48:11,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:11,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614553509] [2020-10-29 09:48:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:11,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:11,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:11,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:11,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-29 09:48:11,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:11,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:11,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:48:11,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:11,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:48:11,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:11,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:11,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:11,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:11,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:11,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:11,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:11,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:11,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:11,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:48:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614553509] [2020-10-29 09:48:11,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:11,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:48:11,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201016409] [2020-10-29 09:48:11,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:48:11,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:48:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:48:11,984 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand 6 states. [2020-10-29 09:48:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:12,223 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2020-10-29 09:48:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:48:12,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-29 09:48:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:12,224 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:48:12,224 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:48:12,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:48:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-29 09:48:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:48:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2020-10-29 09:48:12,237 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 20 [2020-10-29 09:48:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:12,237 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2020-10-29 09:48:12,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:48:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2020-10-29 09:48:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:12,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:12,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:12,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:48:12,241 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:12,242 INFO L82 PathProgramCache]: Analyzing trace with hash 814661467, now seen corresponding path program 3 times [2020-10-29 09:48:12,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:12,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096671143] [2020-10-29 09:48:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:12,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:12,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:12,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:12,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-29 09:48:12,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:12,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:48:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:12,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:48:12,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:13,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:13,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:13,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:13,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:13,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:13,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:13,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:13,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096671143] [2020-10-29 09:48:13,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:13,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:48:13,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468626016] [2020-10-29 09:48:13,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:48:13,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:48:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:48:13,330 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand 12 states. [2020-10-29 09:48:14,211 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-29 09:48:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:14,350 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2020-10-29 09:48:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:48:14,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-29 09:48:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:14,352 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:48:14,352 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:48:14,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:48:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:48:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:48:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:48:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 82 transitions. [2020-10-29 09:48:14,364 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 82 transitions. Word has length 20 [2020-10-29 09:48:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:14,365 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-10-29 09:48:14,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:48:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 82 transitions. [2020-10-29 09:48:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:48:14,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:14,366 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:14,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:48:14,366 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1927668051, now seen corresponding path program 4 times [2020-10-29 09:48:14,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:14,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943956199] [2020-10-29 09:48:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:14,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:48:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-29 09:48:14,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:14,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:48:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:14,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:14,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:14,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:14,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:14,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:14,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:14,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:14,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:14,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:14,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:14,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943956199] [2020-10-29 09:48:14,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:14,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:48:14,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430541592] [2020-10-29 09:48:14,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:48:14,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:14,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:48:14,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:48:14,865 INFO L87 Difference]: Start difference. First operand 61 states and 82 transitions. Second operand 8 states. [2020-10-29 09:48:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:15,196 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2020-10-29 09:48:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:48:15,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-29 09:48:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:15,197 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:48:15,198 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:48:15,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:48:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:48:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2020-10-29 09:48:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:48:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2020-10-29 09:48:15,219 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 20 [2020-10-29 09:48:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:15,219 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2020-10-29 09:48:15,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:48:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2020-10-29 09:48:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:15,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:15,225 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:15,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:48:15,226 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2094307012, now seen corresponding path program 3 times [2020-10-29 09:48:15,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:15,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38333854] [2020-10-29 09:48:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:15,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:15,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:15,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:16,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:16,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:16,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-29 09:48:16,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:16,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:16,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:16,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:48:16,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:48:16,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:16,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:16,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:16,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:16,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:16,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:16,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:16,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:16,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:48:16,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38333854] [2020-10-29 09:48:16,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:16,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:16,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728926369] [2020-10-29 09:48:16,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:16,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:16,169 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 7 states. [2020-10-29 09:48:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:16,514 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2020-10-29 09:48:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:16,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-29 09:48:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:16,515 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:48:16,515 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:48:16,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:48:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-10-29 09:48:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:48:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2020-10-29 09:48:16,529 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 21 [2020-10-29 09:48:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:16,529 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2020-10-29 09:48:16,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2020-10-29 09:48:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:48:16,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:16,530 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:16,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:48:16,530 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -763152699, now seen corresponding path program 5 times [2020-10-29 09:48:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:16,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475416573] [2020-10-29 09:48:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:16,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:16,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:16,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:48:16,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:48:16,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-29 09:48:16,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:16,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:16,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:48:16,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:16,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:48:16,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:48:17,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:17,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:17,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:17,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:17,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:17,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:17,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:17,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475416573] [2020-10-29 09:48:17,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:17,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:48:17,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720358059] [2020-10-29 09:48:17,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:48:17,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:48:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:48:17,098 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand 9 states. [2020-10-29 09:48:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:17,556 INFO L93 Difference]: Finished difference Result 143 states and 212 transitions. [2020-10-29 09:48:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:48:17,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-29 09:48:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:17,557 INFO L225 Difference]: With dead ends: 143 [2020-10-29 09:48:17,558 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:48:17,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:48:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:48:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2020-10-29 09:48:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:48:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2020-10-29 09:48:17,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 21 [2020-10-29 09:48:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:17,572 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2020-10-29 09:48:17,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:48:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2020-10-29 09:48:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:48:17,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:17,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:17,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:48:17,573 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1185755859, now seen corresponding path program 2 times [2020-10-29 09:48:17,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:17,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774440028] [2020-10-29 09:48:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:17,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:48:17,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:48:17,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-29 09:48:17,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:48:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:48:17,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:17,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:17,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:17,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:17,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:17,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:17,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:48:17,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774440028] [2020-10-29 09:48:17,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:17,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:48:17,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407835588] [2020-10-29 09:48:17,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:48:17,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:48:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:48:17,946 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand 7 states. [2020-10-29 09:48:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:18,190 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2020-10-29 09:48:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:48:18,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-29 09:48:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:18,192 INFO L225 Difference]: With dead ends: 114 [2020-10-29 09:48:18,192 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:48:18,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:48:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:48:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-29 09:48:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:48:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2020-10-29 09:48:18,205 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 22 [2020-10-29 09:48:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:18,205 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2020-10-29 09:48:18,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:48:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2020-10-29 09:48:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:48:18,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:18,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:18,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:48:18,207 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1462683795, now seen corresponding path program 6 times [2020-10-29 09:48:18,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:18,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674204154] [2020-10-29 09:48:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:18,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:18,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:21,074 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 1 c_main_~y~0)) (.cse4 (<= c_main_~y~0 1))) (and (= (+ c_main_~x~0 1) c_main_~n~0) .cse0 (let ((.cse3 (div c_main_~x~0 4294967296))) (let ((.cse1 (* 4294967296 .cse3))) (or (<= (+ .cse1 4294967297) c_main_~n~0) (and (<= c_main_~n~0 (+ .cse1 4294967295)) (let ((.cse2 (div (* c_main_~n~0 2) 4294967296))) (or (and (<= (* 4294967296 .cse2) (+ c_main_~y~0 (* 8589934592 .cse3) 4294967295)) .cse4) (<= (+ c_main_~n~0 1) (* 2147483648 .cse2)))) .cse0)))) .cse4)) is different from false [2020-10-29 09:48:23,285 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 50 DAG size of output: 20 [2020-10-29 09:48:25,458 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-29 09:48:42,067 WARN L193 SmtUtils]: Spent 14.50 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-29 09:48:50,506 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-29 09:49:07,222 WARN L193 SmtUtils]: Spent 12.57 s on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-29 09:49:07,439 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-29 09:49:09,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:09,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:09,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:09,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:09,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:09,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:09,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:09,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2020-10-29 09:49:09,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674204154] [2020-10-29 09:49:09,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:09,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:49:09,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552850896] [2020-10-29 09:49:09,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:49:09,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:49:09,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=128, Unknown=6, NotChecked=22, Total=182 [2020-10-29 09:49:09,806 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand 14 states. [2020-10-29 09:49:41,212 WARN L193 SmtUtils]: Spent 29.16 s on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-29 09:49:45,625 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 76 [2020-10-29 09:50:02,670 WARN L193 SmtUtils]: Spent 10.62 s on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-10-29 09:50:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:03,100 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2020-10-29 09:50:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:50:03,100 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-29 09:50:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:03,101 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:50:03,101 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:50:03,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 103.3s TimeCoverageRelationStatistics Valid=51, Invalid=284, Unknown=11, NotChecked=34, Total=380 [2020-10-29 09:50:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:50:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-29 09:50:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:50:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2020-10-29 09:50:03,113 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 22 [2020-10-29 09:50:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:03,114 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2020-10-29 09:50:03,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:50:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2020-10-29 09:50:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:50:03,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:03,116 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:03,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:50:03,117 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash 977084845, now seen corresponding path program 7 times [2020-10-29 09:50:03,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:03,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022591870] [2020-10-29 09:50:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:03,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:03,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:03,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:03,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:03,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:50:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:03,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:03,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:03,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:03,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:03,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:03,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:03,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:03,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:03,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:03,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:03,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:03,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:03,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022591870] [2020-10-29 09:50:03,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:03,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:50:03,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303034196] [2020-10-29 09:50:03,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:50:03,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:50:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:50:03,699 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand 10 states. [2020-10-29 09:50:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:04,233 INFO L93 Difference]: Finished difference Result 148 states and 222 transitions. [2020-10-29 09:50:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:50:04,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-29 09:50:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:04,236 INFO L225 Difference]: With dead ends: 148 [2020-10-29 09:50:04,236 INFO L226 Difference]: Without dead ends: 132 [2020-10-29 09:50:04,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:50:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-29 09:50:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 101. [2020-10-29 09:50:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:50:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2020-10-29 09:50:04,254 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 22 [2020-10-29 09:50:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:04,254 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2020-10-29 09:50:04,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:50:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2020-10-29 09:50:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:50:04,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:04,255 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:04,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:50:04,255 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash -910126139, now seen corresponding path program 8 times [2020-10-29 09:50:04,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:04,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404943901] [2020-10-29 09:50:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:04,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:04,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:04,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:04,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:50:04,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:04,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-29 09:50:04,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:04,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:50:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:50:04,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:04,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:04,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:04,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:04,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:04,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:04,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:04,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:04,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:04,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:04,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:04,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:04,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404943901] [2020-10-29 09:50:04,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:04,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:50:04,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882379712] [2020-10-29 09:50:04,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:50:04,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:50:04,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:50:04,980 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand 11 states. [2020-10-29 09:50:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:05,642 INFO L93 Difference]: Finished difference Result 165 states and 250 transitions. [2020-10-29 09:50:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:50:05,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-29 09:50:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:05,644 INFO L225 Difference]: With dead ends: 165 [2020-10-29 09:50:05,644 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:50:05,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:50:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:50:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2020-10-29 09:50:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:50:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2020-10-29 09:50:05,658 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 157 transitions. Word has length 23 [2020-10-29 09:50:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:05,658 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 157 transitions. [2020-10-29 09:50:05,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:50:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 157 transitions. [2020-10-29 09:50:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:05,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:05,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:05,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:50:05,660 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:05,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1925689755, now seen corresponding path program 3 times [2020-10-29 09:50:05,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:05,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186958293] [2020-10-29 09:50:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:05,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:05,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:06,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:50:06,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:08,835 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-29 09:50:11,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:11,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:11,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:11,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:11,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:11,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:11,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:11,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:11,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:11,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:11,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:11,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:50:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186958293] [2020-10-29 09:50:11,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:11,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:50:11,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883582275] [2020-10-29 09:50:11,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:50:11,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:50:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=152, Unknown=1, NotChecked=0, Total=182 [2020-10-29 09:50:11,145 INFO L87 Difference]: Start difference. First operand 113 states and 157 transitions. Second operand 14 states. [2020-10-29 09:50:18,242 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 62 [2020-10-29 09:50:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:21,126 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-10-29 09:50:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:50:21,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-29 09:50:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:21,128 INFO L225 Difference]: With dead ends: 140 [2020-10-29 09:50:21,128 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:50:21,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=156, Invalid=899, Unknown=1, NotChecked=0, Total=1056 [2020-10-29 09:50:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:50:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2020-10-29 09:50:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:50:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2020-10-29 09:50:21,142 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 24 [2020-10-29 09:50:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:21,142 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2020-10-29 09:50:21,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:50:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2020-10-29 09:50:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:21,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:21,143 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:21,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:50:21,143 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash -727220421, now seen corresponding path program 4 times [2020-10-29 09:50:21,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:21,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533034877] [2020-10-29 09:50:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:21,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:21,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:21,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:23,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:23,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:23,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:23,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1850 [2020-10-29 09:50:23,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:23,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:23,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:50:23,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:50:23,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:50:23,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:23,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:23,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:23,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:23,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:23,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:23,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:23,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:23,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:23,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:23,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:23,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:23,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:50:23,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533034877] [2020-10-29 09:50:23,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:23,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:50:23,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782789538] [2020-10-29 09:50:23,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:50:23,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:23,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:50:23,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:50:23,139 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand 8 states. [2020-10-29 09:50:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:23,588 INFO L93 Difference]: Finished difference Result 156 states and 215 transitions. [2020-10-29 09:50:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:50:23,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:50:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:23,590 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:50:23,590 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:50:23,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:50:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:50:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 139. [2020-10-29 09:50:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 09:50:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 192 transitions. [2020-10-29 09:50:23,605 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 192 transitions. Word has length 24 [2020-10-29 09:50:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:23,605 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 192 transitions. [2020-10-29 09:50:23,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:50:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 192 transitions. [2020-10-29 09:50:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:23,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:23,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:23,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:50:23,607 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:23,607 INFO L82 PathProgramCache]: Analyzing trace with hash 202665963, now seen corresponding path program 5 times [2020-10-29 09:50:23,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:23,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377422308] [2020-10-29 09:50:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:23,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:23,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:23,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:23,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:24,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:24,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:24,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:24,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-29 09:50:24,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:24,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:50:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:50:24,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:25,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:25,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:25,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:25,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:25,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:25,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:25,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:25,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:25,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:25,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377422308] [2020-10-29 09:50:25,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:25,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:50:25,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908228487] [2020-10-29 09:50:25,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:50:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:50:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:50:25,340 INFO L87 Difference]: Start difference. First operand 139 states and 192 transitions. Second operand 15 states. [2020-10-29 09:50:26,068 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-29 09:50:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:26,458 INFO L93 Difference]: Finished difference Result 155 states and 207 transitions. [2020-10-29 09:50:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:50:26,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:50:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:26,462 INFO L225 Difference]: With dead ends: 155 [2020-10-29 09:50:26,462 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:50:26,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:50:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2020-10-29 09:50:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 09:50:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 191 transitions. [2020-10-29 09:50:26,476 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 191 transitions. Word has length 24 [2020-10-29 09:50:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:26,477 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 191 transitions. [2020-10-29 09:50:26,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:50:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 191 transitions. [2020-10-29 09:50:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:26,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:26,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:26,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:50:26,478 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash 839821211, now seen corresponding path program 9 times [2020-10-29 09:50:26,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:26,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695797437] [2020-10-29 09:50:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:26,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:27,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:27,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:50:27,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:28,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:28,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:28,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695797437] [2020-10-29 09:50:28,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:28,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:50:28,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346677361] [2020-10-29 09:50:28,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:50:28,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:28,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:50:28,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:50:28,120 INFO L87 Difference]: Start difference. First operand 139 states and 191 transitions. Second operand 16 states. [2020-10-29 09:50:28,860 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:50:29,095 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 09:50:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:29,433 INFO L93 Difference]: Finished difference Result 156 states and 207 transitions. [2020-10-29 09:50:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:50:29,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-29 09:50:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:29,436 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:50:29,436 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 09:50:29,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:50:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 09:50:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2020-10-29 09:50:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 09:50:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 190 transitions. [2020-10-29 09:50:29,453 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 190 transitions. Word has length 24 [2020-10-29 09:50:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:29,453 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 190 transitions. [2020-10-29 09:50:29,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:50:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 190 transitions. [2020-10-29 09:50:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:29,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:29,454 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:29,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:50:29,454 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:29,455 INFO L82 PathProgramCache]: Analyzing trace with hash 715875501, now seen corresponding path program 10 times [2020-10-29 09:50:29,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:29,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344684136] [2020-10-29 09:50:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:29,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:29,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:29,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:29,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:29,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:29,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-29 09:50:29,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:29,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:50:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:50:29,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:30,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:30,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:30,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:30,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:30,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:30,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:30,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:30,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:50:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344684136] [2020-10-29 09:50:30,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:30,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:50:30,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427845592] [2020-10-29 09:50:30,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:50:30,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:30,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:50:30,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:50:30,200 INFO L87 Difference]: Start difference. First operand 139 states and 190 transitions. Second operand 12 states. [2020-10-29 09:50:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:31,066 INFO L93 Difference]: Finished difference Result 199 states and 292 transitions. [2020-10-29 09:50:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:50:31,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-29 09:50:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:31,068 INFO L225 Difference]: With dead ends: 199 [2020-10-29 09:50:31,068 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 09:50:31,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 09:50:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2020-10-29 09:50:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:50:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 188 transitions. [2020-10-29 09:50:31,091 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 188 transitions. Word has length 24 [2020-10-29 09:50:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:31,091 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 188 transitions. [2020-10-29 09:50:31,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:50:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 188 transitions. [2020-10-29 09:50:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:31,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:31,092 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:31,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:50:31,094 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1181602587, now seen corresponding path program 3 times [2020-10-29 09:50:31,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:31,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313286774] [2020-10-29 09:50:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:31,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:31,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:31,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:31,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:31,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-29 09:50:31,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:31,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:31,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:50:31,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:31,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:50:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:31,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:31,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:31,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:31,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:31,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:31,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:31,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:31,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:31,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:31,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:31,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:31,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:31,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313286774] [2020-10-29 09:50:31,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:31,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:50:31,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229903142] [2020-10-29 09:50:31,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:50:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:50:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:50:31,748 INFO L87 Difference]: Start difference. First operand 138 states and 188 transitions. Second operand 12 states. [2020-10-29 09:50:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:32,624 INFO L93 Difference]: Finished difference Result 171 states and 235 transitions. [2020-10-29 09:50:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:50:32,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-29 09:50:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:32,626 INFO L225 Difference]: With dead ends: 171 [2020-10-29 09:50:32,627 INFO L226 Difference]: Without dead ends: 159 [2020-10-29 09:50:32,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-29 09:50:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2020-10-29 09:50:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-29 09:50:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 209 transitions. [2020-10-29 09:50:32,646 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 209 transitions. Word has length 24 [2020-10-29 09:50:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:32,646 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 209 transitions. [2020-10-29 09:50:32,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:50:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 209 transitions. [2020-10-29 09:50:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:50:32,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:32,647 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:32,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:50:32,647 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1642397396, now seen corresponding path program 6 times [2020-10-29 09:50:32,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:32,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049646848] [2020-10-29 09:50:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:32,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:32,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:32,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:34,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:34,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:50:34,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:34,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-29 09:50:34,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:34,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:50:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:50:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:50:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:34,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:34,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:34,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:34,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:34,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:50:34,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049646848] [2020-10-29 09:50:34,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:34,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:50:34,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164173750] [2020-10-29 09:50:34,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:50:34,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:34,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:50:34,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:50:34,820 INFO L87 Difference]: Start difference. First operand 152 states and 209 transitions. Second operand 9 states. [2020-10-29 09:50:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:35,363 INFO L93 Difference]: Finished difference Result 189 states and 262 transitions. [2020-10-29 09:50:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:50:35,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-29 09:50:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:35,365 INFO L225 Difference]: With dead ends: 189 [2020-10-29 09:50:35,365 INFO L226 Difference]: Without dead ends: 182 [2020-10-29 09:50:35,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:50:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-29 09:50:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 171. [2020-10-29 09:50:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-29 09:50:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 237 transitions. [2020-10-29 09:50:35,390 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 237 transitions. Word has length 25 [2020-10-29 09:50:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:35,392 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 237 transitions. [2020-10-29 09:50:35,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:50:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 237 transitions. [2020-10-29 09:50:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:50:35,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:35,393 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:35,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:50:35,393 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:35,396 INFO L82 PathProgramCache]: Analyzing trace with hash -417681211, now seen corresponding path program 11 times [2020-10-29 09:50:35,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:35,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138157709] [2020-10-29 09:50:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:50:35,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:50:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-29 09:50:35,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:50:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:50:35,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:36,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:36,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:36,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:36,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:36,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:36,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:36,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:36,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138157709] [2020-10-29 09:50:36,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:36,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:50:36,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74341365] [2020-10-29 09:50:36,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:50:36,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:36,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:50:36,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:50:36,146 INFO L87 Difference]: Start difference. First operand 171 states and 237 transitions. Second operand 13 states. [2020-10-29 09:50:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:37,157 INFO L93 Difference]: Finished difference Result 271 states and 416 transitions. [2020-10-29 09:50:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:50:37,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-29 09:50:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:37,160 INFO L225 Difference]: With dead ends: 271 [2020-10-29 09:50:37,160 INFO L226 Difference]: Without dead ends: 251 [2020-10-29 09:50:37,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-29 09:50:37,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 188. [2020-10-29 09:50:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-29 09:50:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 262 transitions. [2020-10-29 09:50:37,180 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 262 transitions. Word has length 25 [2020-10-29 09:50:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:37,180 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 262 transitions. [2020-10-29 09:50:37,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:50:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 262 transitions. [2020-10-29 09:50:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:50:37,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:37,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:37,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:50:37,182 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:37,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1079885403, now seen corresponding path program 7 times [2020-10-29 09:50:37,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:37,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397928412] [2020-10-29 09:50:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:50:37,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:37,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:37,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:50:37,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397928412] [2020-10-29 09:50:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:50:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017664991] [2020-10-29 09:50:37,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:50:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:50:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:50:37,686 INFO L87 Difference]: Start difference. First operand 188 states and 262 transitions. Second operand 9 states. [2020-10-29 09:50:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:38,622 INFO L93 Difference]: Finished difference Result 317 states and 411 transitions. [2020-10-29 09:50:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:50:38,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:50:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:38,625 INFO L225 Difference]: With dead ends: 317 [2020-10-29 09:50:38,625 INFO L226 Difference]: Without dead ends: 281 [2020-10-29 09:50:38,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-29 09:50:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 179. [2020-10-29 09:50:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-29 09:50:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 242 transitions. [2020-10-29 09:50:38,647 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 242 transitions. Word has length 26 [2020-10-29 09:50:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:38,647 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 242 transitions. [2020-10-29 09:50:38,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:50:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 242 transitions. [2020-10-29 09:50:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:50:38,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:38,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:38,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:50:38,648 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1484701933, now seen corresponding path program 8 times [2020-10-29 09:50:38,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:38,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945368158] [2020-10-29 09:50:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:38,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:39,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:39,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:39,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:50:39,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:39,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-10-29 09:50:39,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:39,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:50:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:39,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:50,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:50,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:50,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:50,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:50,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:50,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:50,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:50,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:50,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945368158] [2020-10-29 09:50:50,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:50,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:50:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23533179] [2020-10-29 09:50:50,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:50:50,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:50:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=264, Unknown=5, NotChecked=0, Total=306 [2020-10-29 09:50:50,906 INFO L87 Difference]: Start difference. First operand 179 states and 242 transitions. Second operand 18 states. [2020-10-29 09:50:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:57,967 INFO L93 Difference]: Finished difference Result 192 states and 254 transitions. [2020-10-29 09:50:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:50:57,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-29 09:50:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:57,969 INFO L225 Difference]: With dead ends: 192 [2020-10-29 09:50:57,969 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:50:57,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=75, Invalid=569, Unknown=6, NotChecked=0, Total=650 [2020-10-29 09:50:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:50:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-29 09:50:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-29 09:50:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 241 transitions. [2020-10-29 09:50:57,997 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 241 transitions. Word has length 26 [2020-10-29 09:50:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:57,997 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 241 transitions. [2020-10-29 09:50:57,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:50:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 241 transitions. [2020-10-29 09:50:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:50:57,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:57,998 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:57,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:50:57,998 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1774855195, now seen corresponding path program 9 times [2020-10-29 09:50:57,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:58,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880910673] [2020-10-29 09:50:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:58,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:58,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:50:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:50:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-29 09:50:58,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:58,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:50:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:01,437 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-10-29 09:51:01,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:01,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:01,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:01,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:01,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:01,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:01,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:01,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:01,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:01,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:01,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880910673] [2020-10-29 09:51:01,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:01,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:51:01,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119753122] [2020-10-29 09:51:01,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:51:01,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:01,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:51:02,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:51:02,003 INFO L87 Difference]: Start difference. First operand 179 states and 241 transitions. Second operand 18 states. [2020-10-29 09:51:02,753 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 09:51:03,053 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-29 09:51:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:05,421 INFO L93 Difference]: Finished difference Result 192 states and 253 transitions. [2020-10-29 09:51:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:51:05,422 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-29 09:51:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:05,423 INFO L225 Difference]: With dead ends: 192 [2020-10-29 09:51:05,423 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:51:05,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:51:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:51:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-29 09:51:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-29 09:51:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 240 transitions. [2020-10-29 09:51:05,445 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 240 transitions. Word has length 26 [2020-10-29 09:51:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:05,445 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 240 transitions. [2020-10-29 09:51:05,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:51:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 240 transitions. [2020-10-29 09:51:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:51:05,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:05,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:05,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:51:05,446 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1091478317, now seen corresponding path program 12 times [2020-10-29 09:51:05,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:05,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198544999] [2020-10-29 09:51:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:05,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:05,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:05,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:51:06,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:07,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:07,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:07,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:07,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:07,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:07,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:07,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:07,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198544999] [2020-10-29 09:51:07,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:07,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:51:07,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250749707] [2020-10-29 09:51:07,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:51:07,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:07,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:51:07,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:51:07,461 INFO L87 Difference]: Start difference. First operand 179 states and 240 transitions. Second operand 18 states. [2020-10-29 09:51:12,385 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:51:14,709 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:51:16,975 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 57 [2020-10-29 09:51:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:21,330 INFO L93 Difference]: Finished difference Result 198 states and 258 transitions. [2020-10-29 09:51:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:51:21,330 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-29 09:51:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:21,332 INFO L225 Difference]: With dead ends: 198 [2020-10-29 09:51:21,332 INFO L226 Difference]: Without dead ends: 185 [2020-10-29 09:51:21,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:51:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-29 09:51:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 179. [2020-10-29 09:51:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-29 09:51:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 239 transitions. [2020-10-29 09:51:21,353 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 239 transitions. Word has length 26 [2020-10-29 09:51:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:21,353 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 239 transitions. [2020-10-29 09:51:21,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:51:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 239 transitions. [2020-10-29 09:51:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:51:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:21,354 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:21,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:51:21,354 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash -732473829, now seen corresponding path program 4 times [2020-10-29 09:51:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:21,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499880926] [2020-10-29 09:51:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:21,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:51:21,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:21,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-29 09:51:21,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:21,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:51:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:51:21,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:21,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:21,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:21,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:21,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:21,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:21,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:21,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:21,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:21,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499880926] [2020-10-29 09:51:21,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:21,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:51:21,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102109324] [2020-10-29 09:51:21,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:51:21,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:21,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:51:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:51:21,943 INFO L87 Difference]: Start difference. First operand 179 states and 239 transitions. Second operand 14 states. [2020-10-29 09:51:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:23,176 INFO L93 Difference]: Finished difference Result 298 states and 432 transitions. [2020-10-29 09:51:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:51:23,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-29 09:51:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:23,179 INFO L225 Difference]: With dead ends: 298 [2020-10-29 09:51:23,179 INFO L226 Difference]: Without dead ends: 278 [2020-10-29 09:51:23,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:51:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-29 09:51:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 195. [2020-10-29 09:51:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-29 09:51:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 263 transitions. [2020-10-29 09:51:23,204 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 263 transitions. Word has length 26 [2020-10-29 09:51:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:23,204 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 263 transitions. [2020-10-29 09:51:23,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:51:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 263 transitions. [2020-10-29 09:51:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:51:23,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:23,205 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:23,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:51:23,205 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash 841219123, now seen corresponding path program 5 times [2020-10-29 09:51:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:23,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806413232] [2020-10-29 09:51:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:23,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:23,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:51:23,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-29 09:51:23,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:23,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:51:23,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:23,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:51:23,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:23,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:23,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:23,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:23,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806413232] [2020-10-29 09:51:23,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:23,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:51:23,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318150795] [2020-10-29 09:51:23,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:51:23,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:23,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:51:23,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:51:23,846 INFO L87 Difference]: Start difference. First operand 195 states and 263 transitions. Second operand 15 states. [2020-10-29 09:51:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:25,268 INFO L93 Difference]: Finished difference Result 321 states and 470 transitions. [2020-10-29 09:51:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:51:25,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-29 09:51:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:25,271 INFO L225 Difference]: With dead ends: 321 [2020-10-29 09:51:25,271 INFO L226 Difference]: Without dead ends: 301 [2020-10-29 09:51:25,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:51:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-29 09:51:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 211. [2020-10-29 09:51:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-29 09:51:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 287 transitions. [2020-10-29 09:51:25,303 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 287 transitions. Word has length 27 [2020-10-29 09:51:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:25,303 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 287 transitions. [2020-10-29 09:51:25,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:51:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 287 transitions. [2020-10-29 09:51:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:51:25,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:25,304 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:25,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:51:25,304 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:25,306 INFO L82 PathProgramCache]: Analyzing trace with hash 686660075, now seen corresponding path program 10 times [2020-10-29 09:51:25,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:25,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761280727] [2020-10-29 09:51:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:25,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:25,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:26,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:26,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:26,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:51:26,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:51:26,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-29 09:51:26,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:26,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:26,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:51:26,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:26,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:51:26,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:27,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:27,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:27,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:27,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:27,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:27,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:27,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:27,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:27,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:51:27,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761280727] [2020-10-29 09:51:27,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:27,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:51:27,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110485271] [2020-10-29 09:51:27,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:51:27,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:27,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:51:27,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:51:27,171 INFO L87 Difference]: Start difference. First operand 211 states and 287 transitions. Second operand 17 states. [2020-10-29 09:51:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:41,868 INFO L93 Difference]: Finished difference Result 253 states and 333 transitions. [2020-10-29 09:51:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:51:41,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-29 09:51:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:41,871 INFO L225 Difference]: With dead ends: 253 [2020-10-29 09:51:41,871 INFO L226 Difference]: Without dead ends: 238 [2020-10-29 09:51:41,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=201, Invalid=1519, Unknown=2, NotChecked=0, Total=1722 [2020-10-29 09:51:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-29 09:51:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2020-10-29 09:51:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-29 09:51:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 301 transitions. [2020-10-29 09:51:41,898 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 301 transitions. Word has length 28 [2020-10-29 09:51:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:41,899 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 301 transitions. [2020-10-29 09:51:41,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:51:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 301 transitions. [2020-10-29 09:51:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:51:41,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:41,900 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:41,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:51:41,900 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1942661717, now seen corresponding path program 11 times [2020-10-29 09:51:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:41,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607605498] [2020-10-29 09:51:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:41,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:41,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:44,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2909 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:51:44,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:45,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:45,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:45,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:45,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:45,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:51:45,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:45,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:45,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:51:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:51:45,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607605498] [2020-10-29 09:51:45,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:45,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:51:45,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754885404] [2020-10-29 09:51:45,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:51:45,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:51:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:51:45,066 INFO L87 Difference]: Start difference. First operand 223 states and 301 transitions. Second operand 10 states. [2020-10-29 09:51:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:46,020 INFO L93 Difference]: Finished difference Result 269 states and 366 transitions. [2020-10-29 09:51:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:51:46,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 09:51:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:46,023 INFO L225 Difference]: With dead ends: 269 [2020-10-29 09:51:46,023 INFO L226 Difference]: Without dead ends: 262 [2020-10-29 09:51:46,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:51:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-29 09:51:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2020-10-29 09:51:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-29 09:51:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 336 transitions. [2020-10-29 09:51:46,053 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 336 transitions. Word has length 28 [2020-10-29 09:51:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:46,053 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 336 transitions. [2020-10-29 09:51:46,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:51:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 336 transitions. [2020-10-29 09:51:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:51:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:46,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:46,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:51:46,054 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1275624997, now seen corresponding path program 12 times [2020-10-29 09:51:46,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:46,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794312153] [2020-10-29 09:51:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:46,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:47,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:47,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:51:47,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:51:47,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-29 09:51:47,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:47,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:51:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:51:47,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:49,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:49,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:49,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:49,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:49,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:49,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794312153] [2020-10-29 09:51:49,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:49,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:51:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707112140] [2020-10-29 09:51:49,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:51:49,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:51:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=272, Unknown=1, NotChecked=0, Total=306 [2020-10-29 09:51:49,689 INFO L87 Difference]: Start difference. First operand 248 states and 336 transitions. Second operand 18 states. [2020-10-29 09:51:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:51,438 INFO L93 Difference]: Finished difference Result 267 states and 354 transitions. [2020-10-29 09:51:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:51:51,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-29 09:51:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:51,440 INFO L225 Difference]: With dead ends: 267 [2020-10-29 09:51:51,441 INFO L226 Difference]: Without dead ends: 253 [2020-10-29 09:51:51,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=131, Invalid=1128, Unknown=1, NotChecked=0, Total=1260 [2020-10-29 09:51:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-29 09:51:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 248. [2020-10-29 09:51:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-29 09:51:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 335 transitions. [2020-10-29 09:51:51,469 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 335 transitions. Word has length 28 [2020-10-29 09:51:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:51,469 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 335 transitions. [2020-10-29 09:51:51,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:51:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 335 transitions. [2020-10-29 09:51:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:51:51,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:51,470 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:51,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:51:51,471 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1293474795, now seen corresponding path program 13 times [2020-10-29 09:51:51,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:51,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896981568] [2020-10-29 09:51:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1622 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:51:53,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:59,955 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 46 DAG size of output: 15 [2020-10-29 09:52:00,317 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 13