/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=SHALLOWEST --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/array-fpi/condm.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:37:18,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:37:18,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:37:18,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:37:18,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:37:18,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:37:18,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:37:18,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:37:18,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:37:18,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:37:18,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:37:18,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:37:18,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:37:18,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:37:18,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:37:18,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:37:18,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:37:18,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:37:18,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:37:18,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:37:18,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:37:18,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:37:18,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:37:18,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:37:18,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:37:18,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:37:18,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:37:18,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:37:18,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:37:18,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:37:18,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:37:18,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:37:18,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:37:18,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:37:18,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:37:18,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:37:18,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:37:18,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:37:18,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:37:18,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:37:18,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:37:18,578 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 [2020-10-26 19:37:18,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:37:18,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:37:18,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:37:18,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:37:18,646 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:37:18,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:37:18,648 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:37:18,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:37:18,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:37:18,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:37:18,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:37:18,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:37:18,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:37:18,651 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:37:18,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:37:18,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:37:18,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:37:18,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:37:18,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:37:18,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:37:18,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:37:18,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:37:18,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:37:18,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:37:18,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:37:18,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:37:18,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:37:18,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:37:18,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:37:18,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:37:19,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:37:19,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:37:19,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:37:19,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:37:19,119 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:37:19,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condm.c [2020-10-26 19:37:19,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c19315d8/de6b3215e70b4f89b950eb9169e12927/FLAGbc71aa792 [2020-10-26 19:37:19,902 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:37:19,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condm.c [2020-10-26 19:37:19,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c19315d8/de6b3215e70b4f89b950eb9169e12927/FLAGbc71aa792 [2020-10-26 19:37:20,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c19315d8/de6b3215e70b4f89b950eb9169e12927 [2020-10-26 19:37:20,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:37:20,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:37:20,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:20,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:37:20,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:37:20,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d33371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20, skipping insertion in model container [2020-10-26 19:37:20,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:37:20,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:37:20,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:20,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:37:20,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:20,563 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:37:20,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20 WrapperNode [2020-10-26 19:37:20,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:20,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:37:20,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:37:20,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:37:20,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (1/1) ... [2020-10-26 19:37:20,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:37:20,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:37:20,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:37:20,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:37:20,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (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 [2020-10-26 19:37:20,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:37:20,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:37:20,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:37:20,705 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:37:20,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:37:20,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:37:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:37:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:37:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:37:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:37:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:37:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:37:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:37:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:37:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:37:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:37:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:37:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:37:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:37:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:37:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:37:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:37:21,427 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:37:21,428 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:37:21,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:21 BoogieIcfgContainer [2020-10-26 19:37:21,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:37:21,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:37:21,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:37:21,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:37:21,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:37:20" (1/3) ... [2020-10-26 19:37:21,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbc3634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:21, skipping insertion in model container [2020-10-26 19:37:21,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:20" (2/3) ... [2020-10-26 19:37:21,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbc3634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:21, skipping insertion in model container [2020-10-26 19:37:21,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:21" (3/3) ... [2020-10-26 19:37:21,445 INFO L111 eAbstractionObserver]: Analyzing ICFG condm.c [2020-10-26 19:37:21,459 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:37:21,465 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:37:21,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:37:21,530 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:37:21,530 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:37:21,530 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:37:21,531 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:37:21,531 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:37:21,531 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:37:21,531 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:37:21,531 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:37:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-26 19:37:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:37:21,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:21,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:21,565 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -603566119, now seen corresponding path program 1 times [2020-10-26 19:37:21,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:21,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7314574] [2020-10-26 19:37:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:21,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:22,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:37:22,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:37:22,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-26 19:37:22,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:37:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:22,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:37:22,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 19:37:22,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:22,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:22,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:22,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:22,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:22,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:22,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:22,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:22,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:22,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:22,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:37:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:22,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:22,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7314574] [2020-10-26 19:37:22,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:22,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:37:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22953285] [2020-10-26 19:37:22,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:37:22,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:22,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:37:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:37:22,983 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-26 19:37:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:23,228 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2020-10-26 19:37:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:37:23,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:37:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:23,240 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:37:23,241 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:37:23,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:37:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:37:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-10-26 19:37:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:37:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-26 19:37:23,300 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-26 19:37:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:23,301 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-26 19:37:23,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:37:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-26 19:37:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:23,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:23,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:23,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:37:23,304 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash 493588519, now seen corresponding path program 1 times [2020-10-26 19:37:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:23,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337942982] [2020-10-26 19:37:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:23,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:28,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:28,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:37:28,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4984 [2020-10-26 19:37:28,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:37:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:37:28,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:28,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:28,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:28,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:28,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:37:28,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:28,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:28,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:28,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:28,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:28,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:28,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:28,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:28,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:28,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:28,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337942982] [2020-10-26 19:37:28,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:28,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:37:28,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024076735] [2020-10-26 19:37:28,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:37:28,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:37:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:37:28,608 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-10-26 19:37:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:28,857 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-26 19:37:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:37:28,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-26 19:37:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:28,860 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:37:28,861 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:37:28,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:37:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-10-26 19:37:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:37:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-26 19:37:28,873 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 28 [2020-10-26 19:37:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:28,874 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-26 19:37:28,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:37:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-26 19:37:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:28,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:28,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:28,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:37:28,876 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 100561509, now seen corresponding path program 1 times [2020-10-26 19:37:28,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:28,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839626088] [2020-10-26 19:37:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:28,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:30,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:30,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-26 19:37:30,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:37:30,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:30,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:37:30,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:30,826 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 23 [2020-10-26 19:37:30,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:30,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:30,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:30,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:30,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:30,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:30,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:30,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:30,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:30,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:30,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839626088] [2020-10-26 19:37:30,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:30,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:37:30,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240228175] [2020-10-26 19:37:30,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:37:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:30,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:37:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:37:30,920 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-10-26 19:37:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:31,492 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-26 19:37:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:37:31,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-26 19:37:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:31,495 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:37:31,495 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:37:31,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:37:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-10-26 19:37:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:37:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-26 19:37:31,508 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 28 [2020-10-26 19:37:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:31,508 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-26 19:37:31,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:37:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-26 19:37:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:37:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:31,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:31,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:37:31,513 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2060613828, now seen corresponding path program 2 times [2020-10-26 19:37:31,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:31,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791670256] [2020-10-26 19:37:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:31,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:34,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:37:34,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:37:34,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2535 [2020-10-26 19:37:34,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:37:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:34,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:37:34,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:34,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:34,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:34,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:34,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:34,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:34,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:34,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:34,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:34,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:34,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:34,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:34,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:34,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:34,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:34,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791670256] [2020-10-26 19:37:34,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:34,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:37:34,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680969602] [2020-10-26 19:37:34,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:37:34,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:37:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:37:34,230 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2020-10-26 19:37:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:34,584 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-26 19:37:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:37:34,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-26 19:37:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:34,590 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:37:34,590 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:37:34,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:37:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:37:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2020-10-26 19:37:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:37:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-26 19:37:34,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 31 [2020-10-26 19:37:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:34,626 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-26 19:37:34,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:37:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-26 19:37:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:37:34,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:34,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:34,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:37:34,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1080780804, now seen corresponding path program 2 times [2020-10-26 19:37:34,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:34,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552546740] [2020-10-26 19:37:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:34,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:37,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:37:37,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:37:37,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3000 [2020-10-26 19:37:37,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:37,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:37:37,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:37,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:37:37,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:38,698 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 21 [2020-10-26 19:37:38,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:38,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:38,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:38,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:38,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:37:38,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:38,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:38,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:38,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:38,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:38,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:38,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:38,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:38,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:38,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:38,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552546740] [2020-10-26 19:37:38,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:38,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:37:38,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175888203] [2020-10-26 19:37:38,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:37:38,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:38,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:37:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:38,790 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 13 states. [2020-10-26 19:37:39,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:39,438 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-26 19:37:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:37:39,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-26 19:37:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:39,443 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:37:39,443 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:37:39,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:37:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:37:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-10-26 19:37:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:37:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-26 19:37:39,457 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 31 [2020-10-26 19:37:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:39,458 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-26 19:37:39,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:37:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-26 19:37:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:37:39,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:39,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:39,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:37:39,462 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:39,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:39,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1903668454, now seen corresponding path program 3 times [2020-10-26 19:37:39,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:39,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251407119] [2020-10-26 19:37:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:39,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:40,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:37:40,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:40,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-26 19:37:40,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:40,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:37:40,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:40,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:37:40,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:40,691 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 24 [2020-10-26 19:37:40,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:40,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:40,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:40,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:40,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:40,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:40,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:40,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:40,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:40,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:40,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:40,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:40,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:40,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251407119] [2020-10-26 19:37:40,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:40,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:37:40,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14064370] [2020-10-26 19:37:40,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:37:40,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:40,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:37:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:37:40,784 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 11 states. [2020-10-26 19:37:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:41,403 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-10-26 19:37:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:37:41,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-26 19:37:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:41,406 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:37:41,406 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:37:41,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:37:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:37:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-10-26 19:37:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:37:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-26 19:37:41,421 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 33 [2020-10-26 19:37:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:41,422 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-26 19:37:41,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:37:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-26 19:37:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:37:41,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:41,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:41,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:37:41,424 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1311152645, now seen corresponding path program 3 times [2020-10-26 19:37:41,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:41,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116202197] [2020-10-26 19:37:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:44,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:37:44,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:37:44,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3041 [2020-10-26 19:37:44,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:44,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:37:44,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:44,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:37:44,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:44,877 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 25 [2020-10-26 19:37:44,994 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2020-10-26 19:37:45,149 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-10-26 19:37:45,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:45,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:45,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:45,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:45,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:45,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:45,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:45,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:45,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:45,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:45,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:45,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:45,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:45,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:45,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:45,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:45,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116202197] [2020-10-26 19:37:45,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:45,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:37:45,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385054605] [2020-10-26 19:37:45,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:37:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:37:45,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:37:45,658 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 14 states. [2020-10-26 19:37:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:46,289 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-10-26 19:37:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:37:46,292 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-26 19:37:46,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:46,294 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:37:46,294 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:37:46,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:37:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:37:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-10-26 19:37:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:37:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-26 19:37:46,307 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2020-10-26 19:37:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:46,308 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-26 19:37:46,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:37:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-26 19:37:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:37:46,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:46,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:46,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:37:46,310 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1710270799, now seen corresponding path program 1 times [2020-10-26 19:37:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:46,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852380612] [2020-10-26 19:37:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:46,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:47,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:37:47,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:47,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-26 19:37:47,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:47,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:37:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:37:47,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:37:47,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:47,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:47,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:47,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:47,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:47,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:47,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:47,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:47,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:47,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:47,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:47,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:47,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:47,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:37:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:47,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:47,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:47,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:47,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:37:47,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 19:37:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:47,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852380612] [2020-10-26 19:37:47,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:47,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:37:47,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929127844] [2020-10-26 19:37:47,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:37:47,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:47,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:37:47,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:47,401 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 8 states. [2020-10-26 19:37:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:47,624 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-10-26 19:37:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:37:47,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-26 19:37:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:47,627 INFO L225 Difference]: With dead ends: 101 [2020-10-26 19:37:47,627 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:37:47,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:37:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:37:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-26 19:37:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:37:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-26 19:37:47,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 36 [2020-10-26 19:37:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:47,653 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-26 19:37:47,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:37:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-26 19:37:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:37:47,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:47,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:37:47,658 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash 676835237, now seen corresponding path program 4 times [2020-10-26 19:37:47,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:47,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566031830] [2020-10-26 19:37:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:49,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:51,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:37:51,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:37:51,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3947 [2020-10-26 19:37:51,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:37:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:37:51,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:51,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:51,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:51,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:51,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:51,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:51,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:51,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:51,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:51,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:51,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:51,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:51,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:51,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:51,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:51,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:51,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566031830] [2020-10-26 19:37:51,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:51,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:37:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129984429] [2020-10-26 19:37:51,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:37:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:51,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:37:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:37:51,742 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 10 states. [2020-10-26 19:37:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:52,115 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-10-26 19:37:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:37:52,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-26 19:37:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:52,118 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:37:52,118 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:37:52,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:37:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-26 19:37:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:37:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-26 19:37:52,148 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 36 [2020-10-26 19:37:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:52,148 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-26 19:37:52,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:37:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-26 19:37:52,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:37:52,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:52,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:52,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:37:52,151 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2032680765, now seen corresponding path program 5 times [2020-10-26 19:37:52,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:52,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274001871] [2020-10-26 19:37:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:57,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:37:57,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:37:57,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:37:57,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:37:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:37:57,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:57,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:57,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:57,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:57,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:57,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:57,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:57,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:57,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:57,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:57,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:57,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:57,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:57,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:57,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:57,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:57,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:57,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:57,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:57,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274001871] [2020-10-26 19:37:57,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:57,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:37:57,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319330548] [2020-10-26 19:37:57,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:37:57,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:57,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:37:57,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:37:57,368 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 12 states. [2020-10-26 19:37:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:58,033 INFO L93 Difference]: Finished difference Result 190 states and 214 transitions. [2020-10-26 19:37:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:37:58,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-26 19:37:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:58,036 INFO L225 Difference]: With dead ends: 190 [2020-10-26 19:37:58,036 INFO L226 Difference]: Without dead ends: 174 [2020-10-26 19:37:58,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:37:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-26 19:37:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 85. [2020-10-26 19:37:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:37:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-10-26 19:37:58,070 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 38 [2020-10-26 19:37:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:58,071 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-10-26 19:37:58,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:37:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-10-26 19:37:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:37:58,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:58,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:58,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:37:58,080 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2146708784, now seen corresponding path program 1 times [2020-10-26 19:37:58,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:58,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351652367] [2020-10-26 19:37:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:58,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:59,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:59,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:59,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-26 19:37:59,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:59,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:37:59,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:59,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:37:59,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:00,359 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 21 [2020-10-26 19:38:00,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:00,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:00,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:00,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:00,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:00,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:00,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:00,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:00,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:00,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:38:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:00,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:00,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:00,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:38:00,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:00,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:00,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351652367] [2020-10-26 19:38:00,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:00,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:38:00,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928641994] [2020-10-26 19:38:00,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:38:00,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:38:00,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:38:00,472 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 13 states. [2020-10-26 19:38:01,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:01,706 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2020-10-26 19:38:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:38:01,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-26 19:38:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:01,708 INFO L225 Difference]: With dead ends: 137 [2020-10-26 19:38:01,708 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:38:01,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:38:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:38:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2020-10-26 19:38:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:38:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-10-26 19:38:01,727 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 41 [2020-10-26 19:38:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:01,727 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-10-26 19:38:01,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:38:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-10-26 19:38:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:38:01,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:01,730 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:01,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:38:01,730 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1167589985, now seen corresponding path program 6 times [2020-10-26 19:38:01,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:01,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562891136] [2020-10-26 19:38:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:01,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2981 [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:38:04,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:04,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:04,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:04,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:04,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:04,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:04,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:04,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:04,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:04,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:04,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562891136] [2020-10-26 19:38:04,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:04,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:38:04,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691324134] [2020-10-26 19:38:04,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:38:04,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:38:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:38:04,857 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 12 states. [2020-10-26 19:38:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:05,596 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-10-26 19:38:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:38:05,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-26 19:38:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:05,598 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:38:05,598 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:38:05,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:38:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:38:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 88. [2020-10-26 19:38:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:38:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:38:05,616 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 40 [2020-10-26 19:38:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:05,617 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:38:05,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:38:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:38:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:38:05,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:05,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:05,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:38:05,618 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash 158692274, now seen corresponding path program 2 times [2020-10-26 19:38:05,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:05,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499998664] [2020-10-26 19:38:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:05,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:09,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:38:09,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:38:09,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3958 [2020-10-26 19:38:09,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:38:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:38:09,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:09,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:09,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:09,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:09,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:09,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:09,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:09,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:09,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:09,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:09,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:09,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:09,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:09,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:09,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:09,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:38:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:09,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:09,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:09,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:09,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:09,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:09,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:09,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:38:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:09,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499998664] [2020-10-26 19:38:09,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:09,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:38:09,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782318410] [2020-10-26 19:38:09,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:38:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:38:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:38:09,708 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2020-10-26 19:38:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:10,071 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-26 19:38:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:38:10,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-26 19:38:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:10,073 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:38:10,073 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:38:10,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:38:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-10-26 19:38:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:38:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-26 19:38:10,093 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 43 [2020-10-26 19:38:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:10,093 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-26 19:38:10,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:38:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-26 19:38:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:38:10,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:10,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:10,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:38:10,095 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:10,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2028788662, now seen corresponding path program 7 times [2020-10-26 19:38:10,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:10,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338979201] [2020-10-26 19:38:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:10,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:10,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:10,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:10,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:38:10,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:10,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-26 19:38:10,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:38:10,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:13,031 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 15 [2020-10-26 19:38:14,575 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 201 DAG size of output: 22 [2020-10-26 19:38:15,161 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 28 [2020-10-26 19:38:15,470 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2020-10-26 19:38:15,793 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-10-26 19:38:16,085 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 12 [2020-10-26 19:38:16,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:16,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:16,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:16,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:16,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:16,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:16,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:16,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:16,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:16,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:16,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:16,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:16,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:16,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:16,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:16,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:16,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:38:16,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338979201] [2020-10-26 19:38:16,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:16,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:38:16,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230456744] [2020-10-26 19:38:16,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:38:16,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:38:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:38:16,185 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 13 states. [2020-10-26 19:38:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:17,045 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-10-26 19:38:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:38:17,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-26 19:38:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:17,048 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:38:17,048 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:38:17,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:38:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:38:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2020-10-26 19:38:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:38:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-26 19:38:17,063 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 43 [2020-10-26 19:38:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:17,064 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-26 19:38:17,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:38:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-26 19:38:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:38:17,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:17,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:17,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:38:17,065 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash -485128533, now seen corresponding path program 3 times [2020-10-26 19:38:17,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:17,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654187647] [2020-10-26 19:38:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:17,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:22,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:22,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:38:22,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:38:22,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:38:22,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:22,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:38:22,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:22,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:38:22,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:22,711 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 29 [2020-10-26 19:38:22,895 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2020-10-26 19:38:23,044 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 18 [2020-10-26 19:38:23,198 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-10-26 19:38:23,337 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-10-26 19:38:23,517 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 12 [2020-10-26 19:38:23,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:23,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:23,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:23,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:23,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:23,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:23,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:23,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:23,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:23,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:23,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:23,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:23,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:23,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:23,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:23,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:23,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:23,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:23,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:23,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:23,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:38:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:23,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:23,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:38:23,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:23,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654187647] [2020-10-26 19:38:23,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:23,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:38:23,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585234480] [2020-10-26 19:38:23,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:38:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:23,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:38:23,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:23,649 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 17 states. [2020-10-26 19:38:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:24,579 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-26 19:38:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:38:24,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-26 19:38:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:24,581 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:38:24,581 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:38:24,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:38:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:38:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-26 19:38:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:38:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-10-26 19:38:24,605 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 46 [2020-10-26 19:38:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:24,605 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-10-26 19:38:24,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:38:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-10-26 19:38:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:38:24,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:24,606 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:24,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:38:24,607 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1625141823, now seen corresponding path program 8 times [2020-10-26 19:38:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:24,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806033491] [2020-10-26 19:38:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:24,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:28,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:38:28,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:38:28,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4195 [2020-10-26 19:38:28,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:38:28,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:28,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:38:28,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,198 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 19 [2020-10-26 19:38:30,448 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 23 [2020-10-26 19:38:30,919 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 28 [2020-10-26 19:38:31,072 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 28 [2020-10-26 19:38:31,253 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2020-10-26 19:38:31,567 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 12 [2020-10-26 19:38:31,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:31,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:31,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:31,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:31,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:31,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:31,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:31,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:31,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:31,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:31,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:31,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:31,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:31,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:31,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:38:31,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806033491] [2020-10-26 19:38:31,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:31,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:38:31,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127488044] [2020-10-26 19:38:31,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:38:31,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:38:31,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:38:31,664 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 14 states. [2020-10-26 19:38:32,540 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-26 19:38:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:32,902 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2020-10-26 19:38:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:38:32,903 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-26 19:38:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:32,905 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:38:32,905 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:38:32,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:38:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:38:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-26 19:38:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:38:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:38:32,923 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 46 [2020-10-26 19:38:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:32,924 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:38:32,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:38:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:38:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:38:32,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:32,925 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:32,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:38:32,925 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:32,926 INFO L82 PathProgramCache]: Analyzing trace with hash 773154066, now seen corresponding path program 4 times [2020-10-26 19:38:32,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:32,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245875273] [2020-10-26 19:38:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:38:37,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:39,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:39,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:39,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:39,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:39,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:39,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:39,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:39,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:39,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:39,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:39,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:39,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:39,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:39,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:39,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:39,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:38:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:39,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:39,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:39,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245875273] [2020-10-26 19:38:39,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:39,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:38:39,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538964348] [2020-10-26 19:38:39,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:38:39,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:39,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:38:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:38:39,385 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 23 states. [2020-10-26 19:38:40,743 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-26 19:38:41,117 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-26 19:38:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:41,494 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-10-26 19:38:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:38:41,496 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-10-26 19:38:41,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:41,498 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:38:41,498 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:38:41,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:38:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:38:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-10-26 19:38:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:38:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:38:41,520 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 49 [2020-10-26 19:38:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:41,520 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:38:41,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:38:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:38:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:38:41,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:41,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:41,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:38:41,521 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:41,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2063882700, now seen corresponding path program 2 times [2020-10-26 19:38:41,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:41,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043286729] [2020-10-26 19:38:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:43,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:38:43,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:43,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1539 [2020-10-26 19:38:43,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:38:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:43,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:38:43,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:46,747 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 332 DAG size of output: 16 [2020-10-26 19:38:47,375 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 21 [2020-10-26 19:38:48,202 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 31 [2020-10-26 19:38:48,451 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2020-10-26 19:38:48,731 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 38 [2020-10-26 19:38:48,995 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2020-10-26 19:38:49,832 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 22 [2020-10-26 19:38:49,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:49,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:49,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:49,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:49,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:49,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:49,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:49,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:49,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:49,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:49,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:49,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:49,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:38:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:49,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:49,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:49,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:49,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:38:49,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:49,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:49,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:49,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:49,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:38:49,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043286729] [2020-10-26 19:38:49,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:49,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:38:49,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588700681] [2020-10-26 19:38:49,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:38:49,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:38:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:38:49,988 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 15 states. [2020-10-26 19:38:51,083 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-26 19:38:51,352 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-26 19:38:51,560 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-26 19:38:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:52,103 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-10-26 19:38:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:38:52,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-26 19:38:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:52,106 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:38:52,106 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:38:52,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:38:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:38:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2020-10-26 19:38:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:38:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2020-10-26 19:38:52,135 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 51 [2020-10-26 19:38:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:52,136 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2020-10-26 19:38:52,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:38:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2020-10-26 19:38:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:38:52,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:52,137 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:52,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:38:52,137 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1846111052, now seen corresponding path program 5 times [2020-10-26 19:38:52,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:52,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454365186] [2020-10-26 19:38:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:38:57,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:57,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:57,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:57,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:57,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:57,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:57,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:57,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:57,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:57,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:57,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:57,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:57,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:57,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:57,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:38:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:57,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:57,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:57,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:57,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:38:57,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:57,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:57,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454365186] [2020-10-26 19:38:57,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:57,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:38:57,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113589965] [2020-10-26 19:38:57,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:38:57,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:57,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:38:57,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:38:57,680 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 14 states. [2020-10-26 19:38:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:58,817 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2020-10-26 19:38:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:38:58,818 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-26 19:38:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:58,820 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:38:58,820 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:38:58,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:38:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:38:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 104. [2020-10-26 19:38:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:38:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2020-10-26 19:38:58,849 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 51 [2020-10-26 19:38:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:58,849 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2020-10-26 19:38:58,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:38:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2020-10-26 19:38:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:38:58,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:58,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:58,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:38:58,851 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:58,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash 527046549, now seen corresponding path program 6 times [2020-10-26 19:38:58,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:58,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488741164] [2020-10-26 19:38:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:58,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:39:03,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:04,338 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-26 19:39:04,610 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 43 [2020-10-26 19:39:04,969 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-26 19:39:05,126 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2020-10-26 19:39:05,428 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 31 [2020-10-26 19:39:05,611 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 31 [2020-10-26 19:39:05,794 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2020-10-26 19:39:06,034 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2020-10-26 19:39:07,285 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 352 DAG size of output: 48 [2020-10-26 19:39:07,554 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2020-10-26 19:39:07,771 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-10-26 19:39:07,964 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-10-26 19:39:08,209 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 15 [2020-10-26 19:39:08,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:08,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:08,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:08,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:08,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:08,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:08,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:08,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:08,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:08,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:08,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:08,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:08,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:39:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:08,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:08,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:08,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:39:08,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:39:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:39:08,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:39:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:08,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:08,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:08,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:39:08,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:08,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:08,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:08,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:08,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:08,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488741164] [2020-10-26 19:39:08,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:08,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:39:08,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703825746] [2020-10-26 19:39:08,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:39:08,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:08,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:39:08,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:39:08,543 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand 28 states. [2020-10-26 19:39:09,131 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-26 19:39:09,423 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2020-10-26 19:39:09,665 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-26 19:39:09,829 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-26 19:39:10,276 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-26 19:39:10,512 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-26 19:39:10,980 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-26 19:39:11,173 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-26 19:39:11,945 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2020-10-26 19:39:12,663 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 94 [2020-10-26 19:39:13,170 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-26 19:39:13,725 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2020-10-26 19:39:14,214 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-10-26 19:39:14,491 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-26 19:39:14,921 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:39:15,222 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-26 19:39:15,890 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-26 19:39:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:16,000 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2020-10-26 19:39:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:39:16,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-10-26 19:39:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:16,002 INFO L225 Difference]: With dead ends: 131 [2020-10-26 19:39:16,002 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:39:16,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=469, Invalid=2287, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:39:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:39:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2020-10-26 19:39:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:39:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2020-10-26 19:39:16,024 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 54 [2020-10-26 19:39:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:16,024 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2020-10-26 19:39:16,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:39:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2020-10-26 19:39:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:39:16,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:16,025 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:16,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:39:16,026 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:16,026 INFO L82 PathProgramCache]: Analyzing trace with hash 234204777, now seen corresponding path program 7 times [2020-10-26 19:39:16,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:16,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383493034] [2020-10-26 19:39:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:21,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:39:21,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:39:21,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:39:21,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:21,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:39:21,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:21,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:39:21,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:21,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:21,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:21,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:21,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:39:21,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:21,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:21,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:21,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:21,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:21,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:21,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:21,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:21,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:21,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:21,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:21,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:21,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:39:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:21,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:21,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:21,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:21,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:21,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:21,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:39:21,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:21,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 19:39:21,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383493034] [2020-10-26 19:39:21,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:21,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:39:21,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360871992] [2020-10-26 19:39:21,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:39:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:39:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:39:21,367 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 10 states. [2020-10-26 19:39:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:22,305 INFO L93 Difference]: Finished difference Result 201 states and 219 transitions. [2020-10-26 19:39:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:39:22,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-26 19:39:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:22,309 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:39:22,309 INFO L226 Difference]: Without dead ends: 169 [2020-10-26 19:39:22,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-26 19:39:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2020-10-26 19:39:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:39:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-26 19:39:22,347 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 54 [2020-10-26 19:39:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:22,348 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-26 19:39:22,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:39:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-26 19:39:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:39:22,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:22,349 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:22,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:39:22,349 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:22,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1282224526, now seen corresponding path program 8 times [2020-10-26 19:39:22,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:22,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513930031] [2020-10-26 19:39:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:22,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:24,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:39:27,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:39:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:39:27,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:39:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:39:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:27,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:27,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:27,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:27,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:27,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:27,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:39:27,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:27,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:27,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:27,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:27,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:39:27,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:39:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:27,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:27,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:27,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:39:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:27,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 44 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 19:39:27,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513930031] [2020-10-26 19:39:27,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:27,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:39:27,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275215049] [2020-10-26 19:39:27,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:39:27,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:27,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:39:27,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:39:27,526 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 12 states. [2020-10-26 19:39:28,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:28,022 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2020-10-26 19:39:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:39:28,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-26 19:39:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:28,025 INFO L225 Difference]: With dead ends: 145 [2020-10-26 19:39:28,025 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:39:28,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:39:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:39:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2020-10-26 19:39:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:39:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2020-10-26 19:39:28,053 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 55 [2020-10-26 19:39:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:28,053 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2020-10-26 19:39:28,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:39:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2020-10-26 19:39:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:39:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:28,055 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:28,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:39:28,055 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 921367559, now seen corresponding path program 9 times [2020-10-26 19:39:28,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:28,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670928553] [2020-10-26 19:39:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:28,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:30,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:39:33,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:38,025 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 477 DAG size of output: 26 [2020-10-26 19:39:40,022 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 428 DAG size of output: 38 [2020-10-26 19:39:41,261 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 306 DAG size of output: 44 [2020-10-26 19:39:42,665 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 306 DAG size of output: 44 [2020-10-26 19:39:43,654 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 46 [2020-10-26 19:39:44,307 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 48 [2020-10-26 19:39:44,842 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2020-10-26 19:39:45,265 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2020-10-26 19:39:45,704 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 39 [2020-10-26 19:39:45,949 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 34 [2020-10-26 19:39:46,181 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-10-26 19:39:46,376 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-10-26 19:39:46,635 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 36 [2020-10-26 19:39:47,087 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 43 [2020-10-26 19:39:47,682 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 18 [2020-10-26 19:39:47,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:47,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:47,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:47,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:47,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:47,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:47,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:47,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:39:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:47,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:47,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:39:47,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:39:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:39:47,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:39:48,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670928553] [2020-10-26 19:39:48,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:48,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:39:48,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169774486] [2020-10-26 19:39:48,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:39:48,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:48,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:39:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:39:48,022 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand 26 states. [2020-10-26 19:39:49,000 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-26 19:39:49,262 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-26 19:39:49,640 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-26 19:39:49,921 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-26 19:39:50,173 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-26 19:39:50,435 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-26 19:39:50,972 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-26 19:39:51,346 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-26 19:39:51,702 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-26 19:39:51,894 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:39:52,279 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-26 19:39:52,651 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-26 19:39:52,866 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-26 19:39:53,175 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-26 19:39:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:53,185 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-10-26 19:39:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:39:53,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-26 19:39:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:53,187 INFO L225 Difference]: With dead ends: 113 [2020-10-26 19:39:53,187 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:39:53,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:39:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:39:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-10-26 19:39:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:39:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-10-26 19:39:53,217 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 56 [2020-10-26 19:39:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:53,217 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-10-26 19:39:53,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:39:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-10-26 19:39:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:39:53,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:53,218 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:53,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:39:53,219 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1623032108, now seen corresponding path program 3 times [2020-10-26 19:39:53,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:53,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899074211] [2020-10-26 19:39:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:53,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:56,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:39:56,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:39:56,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3413 [2020-10-26 19:39:56,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:56,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:39:56,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:56,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:39:56,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0