/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:26:57,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:26:57,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:26:57,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:26:57,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:26:57,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:26:57,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:26:57,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:26:57,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:26:57,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:26:57,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:26:57,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:26:57,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:26:57,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:26:57,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:26:57,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:26:57,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:26:57,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:26:57,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:26:57,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:26:57,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:26:57,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:26:57,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:26:57,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:26:57,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:26:57,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:26:57,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:26:57,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:26:57,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:26:57,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:26:57,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:26:57,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:26:57,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:26:57,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:26:57,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:26:57,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:26:57,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:26:57,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:26:57,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:26:57,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:26:57,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:26:57,708 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 [2020-10-28 18:26:57,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:26:57,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:26:57,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:26:57,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:26:57,738 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:26:57,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:26:57,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:26:57,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:26:57,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:26:57,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:26:57,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:26:57,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:26:57,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:26:57,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:26:57,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:26:57,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:26:57,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:26:57,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:26:57,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:26:57,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:26:57,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:26:57,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:26:57,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:26:57,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:26:57,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:26:57,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:26:57,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:26:57,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:26:57,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:26:57,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:26:58,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:26:58,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:26:58,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:26:58,137 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:26:58,138 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:26:58,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:26:58,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/612277857/f406ba1ff8b74396bdf5ccad64aa1f19/FLAG63cebfd0f [2020-10-28 18:26:58,852 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:26:58,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:26:58,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/612277857/f406ba1ff8b74396bdf5ccad64aa1f19/FLAG63cebfd0f [2020-10-28 18:26:59,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/612277857/f406ba1ff8b74396bdf5ccad64aa1f19 [2020-10-28 18:26:59,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:26:59,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:26:59,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:59,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:26:59,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:26:59,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc1608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59, skipping insertion in model container [2020-10-28 18:26:59,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:26:59,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:26:59,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:59,539 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:26:59,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:59,645 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:26:59,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59 WrapperNode [2020-10-28 18:26:59,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:59,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:26:59,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:26:59,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:26:59,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... [2020-10-28 18:26:59,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:26:59,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:26:59,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:26:59,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:26:59,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:26:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:26:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:26:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:26:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:26:59,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:26:59,822 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:26:59,822 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:26:59,822 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:26:59,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:26:59,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:26:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:26:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:26:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:26:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:26:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:26:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:26:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:26:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:26:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:26:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:26:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:26:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:26:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:26:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:26:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:26:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:26:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:26:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:27:00,657 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:27:00,657 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:27:00,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:27:00 BoogieIcfgContainer [2020-10-28 18:27:00,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:27:00,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:27:00,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:27:00,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:27:00,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:26:59" (1/3) ... [2020-10-28 18:27:00,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34258d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:27:00, skipping insertion in model container [2020-10-28 18:27:00,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:59" (2/3) ... [2020-10-28 18:27:00,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34258d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:27:00, skipping insertion in model container [2020-10-28 18:27:00,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:27:00" (3/3) ... [2020-10-28 18:27:00,668 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:27:00,680 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:27:00,685 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:27:00,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:27:00,726 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:27:00,726 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:27:00,726 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:27:00,726 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:27:00,726 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:27:00,726 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:27:00,727 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:27:00,727 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:27:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-28 18:27:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 18:27:00,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:00,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:00,756 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:00,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1104418387, now seen corresponding path program 1 times [2020-10-28 18:27:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:00,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855917935] [2020-10-28 18:27:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:01,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:06,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:06,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 18:27:06,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:27:06,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:27:06,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:06,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:06,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:06,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:27:06,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:27:06,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:27:06,286 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:06,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:06,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:06,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:06,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:06,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:06,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:27:06,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:06,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:06,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:06,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:06,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855917935] [2020-10-28 18:27:06,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:06,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:27:06,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952126839] [2020-10-28 18:27:06,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:27:06,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:27:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:27:06,363 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2020-10-28 18:27:06,572 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:27:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:07,297 INFO L93 Difference]: Finished difference Result 219 states and 349 transitions. [2020-10-28 18:27:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:27:07,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-28 18:27:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:07,311 INFO L225 Difference]: With dead ends: 219 [2020-10-28 18:27:07,311 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 18:27:07,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 18:27:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2020-10-28 18:27:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 18:27:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 220 transitions. [2020-10-28 18:27:07,377 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 220 transitions. Word has length 52 [2020-10-28 18:27:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:07,378 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 220 transitions. [2020-10-28 18:27:07,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:27:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 220 transitions. [2020-10-28 18:27:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:27:07,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:07,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:07,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:27:07,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:07,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1128688483, now seen corresponding path program 1 times [2020-10-28 18:27:07,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:07,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332115116] [2020-10-28 18:27:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:07,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:07,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:08,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:12,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:27:12,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:27:12,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:27:12,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:12,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:12,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:27:12,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:27:12,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:12,625 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:12,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:12,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:12,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:12,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:27:12,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:12,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:12,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:12,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332115116] [2020-10-28 18:27:12,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:12,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:27:12,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031607415] [2020-10-28 18:27:12,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:27:12,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:27:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:27:12,671 INFO L87 Difference]: Start difference. First operand 156 states and 220 transitions. Second operand 4 states. [2020-10-28 18:27:12,871 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:27:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:13,417 INFO L93 Difference]: Finished difference Result 285 states and 417 transitions. [2020-10-28 18:27:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:27:13,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 18:27:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:13,421 INFO L225 Difference]: With dead ends: 285 [2020-10-28 18:27:13,421 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 18:27:13,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 18:27:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-10-28 18:27:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 18:27:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 285 transitions. [2020-10-28 18:27:13,472 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 285 transitions. Word has length 53 [2020-10-28 18:27:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:13,473 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 285 transitions. [2020-10-28 18:27:13,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:27:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 285 transitions. [2020-10-28 18:27:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:27:13,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:13,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:13,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:27:13,476 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash -95828956, now seen corresponding path program 1 times [2020-10-28 18:27:13,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:13,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754367202] [2020-10-28 18:27:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:13,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:14,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:15,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:15,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:15,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:15,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:15,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:16,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:18,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:18,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:27:18,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:27:18,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:27:18,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:18,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:27:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:18,841 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:18,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:18,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:18,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:18,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:18,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:18,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:27:18,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:18,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:18,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:27:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:18,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754367202] [2020-10-28 18:27:18,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:18,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:27:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082703505] [2020-10-28 18:27:18,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:18,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:18,905 INFO L87 Difference]: Start difference. First operand 199 states and 285 transitions. Second operand 8 states. [2020-10-28 18:27:19,069 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:27:19,548 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:27:20,208 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:27:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:20,347 INFO L93 Difference]: Finished difference Result 1002 states and 1500 transitions. [2020-10-28 18:27:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 18:27:20,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-28 18:27:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:20,359 INFO L225 Difference]: With dead ends: 1002 [2020-10-28 18:27:20,359 INFO L226 Difference]: Without dead ends: 846 [2020-10-28 18:27:20,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-28 18:27:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-28 18:27:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 208. [2020-10-28 18:27:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 18:27:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 291 transitions. [2020-10-28 18:27:20,440 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 291 transitions. Word has length 54 [2020-10-28 18:27:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:20,443 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 291 transitions. [2020-10-28 18:27:20,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 291 transitions. [2020-10-28 18:27:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:27:20,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:20,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:20,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:27:20,450 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash 464608014, now seen corresponding path program 1 times [2020-10-28 18:27:20,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:20,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305416602] [2020-10-28 18:27:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:20,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:24,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:24,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:24,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:25,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:25,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:27:25,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:27:25,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:27:25,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:25,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:27:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:27:25,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:25,733 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:25,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:25,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:25,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:25,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:25,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:25,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:27:25,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:25,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:25,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:25,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:25,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:25,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:25,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305416602] [2020-10-28 18:27:25,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:25,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:25,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809820966] [2020-10-28 18:27:25,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:25,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:25,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:25,770 INFO L87 Difference]: Start difference. First operand 208 states and 291 transitions. Second operand 6 states. [2020-10-28 18:27:25,993 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:27:26,421 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:27:26,648 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:27:26,835 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:27:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:27,094 INFO L93 Difference]: Finished difference Result 567 states and 825 transitions. [2020-10-28 18:27:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:27,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-28 18:27:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:27,098 INFO L225 Difference]: With dead ends: 567 [2020-10-28 18:27:27,098 INFO L226 Difference]: Without dead ends: 445 [2020-10-28 18:27:27,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:27:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-28 18:27:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 296. [2020-10-28 18:27:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-28 18:27:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 424 transitions. [2020-10-28 18:27:27,156 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 424 transitions. Word has length 54 [2020-10-28 18:27:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:27,156 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 424 transitions. [2020-10-28 18:27:27,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 424 transitions. [2020-10-28 18:27:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:27:27,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:27,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:27,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:27:27,167 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1201199661, now seen corresponding path program 1 times [2020-10-28 18:27:27,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:27,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298191468] [2020-10-28 18:27:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:32,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:32,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:27:32,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:27:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:27:32,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:32,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:27:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:27:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:32,413 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:32,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:32,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:32,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:32,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:27:32,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:32,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:32,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:32,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298191468] [2020-10-28 18:27:32,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:32,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:32,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69696384] [2020-10-28 18:27:32,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:32,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:32,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:32,452 INFO L87 Difference]: Start difference. First operand 296 states and 424 transitions. Second operand 6 states. [2020-10-28 18:27:32,671 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:27:33,091 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:27:33,315 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:27:33,500 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:27:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:33,754 INFO L93 Difference]: Finished difference Result 711 states and 1040 transitions. [2020-10-28 18:27:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:33,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-28 18:27:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:33,759 INFO L225 Difference]: With dead ends: 711 [2020-10-28 18:27:33,759 INFO L226 Difference]: Without dead ends: 589 [2020-10-28 18:27:33,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:27:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-28 18:27:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 432. [2020-10-28 18:27:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-10-28 18:27:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 629 transitions. [2020-10-28 18:27:33,804 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 629 transitions. Word has length 54 [2020-10-28 18:27:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:33,804 INFO L481 AbstractCegarLoop]: Abstraction has 432 states and 629 transitions. [2020-10-28 18:27:33,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 629 transitions. [2020-10-28 18:27:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:27:33,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:33,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:33,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:27:33,806 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash 512026434, now seen corresponding path program 1 times [2020-10-28 18:27:33,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:33,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739427911] [2020-10-28 18:27:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:34,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:38,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:27:38,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 18:27:38,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:27:38,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:38,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:27:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:39,085 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:39,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:39,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:39,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:39,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:39,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:27:39,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:39,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:39,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:39,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:39,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:39,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:39,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739427911] [2020-10-28 18:27:39,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:39,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344732888] [2020-10-28 18:27:39,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:39,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:39,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:39,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:39,178 INFO L87 Difference]: Start difference. First operand 432 states and 629 transitions. Second operand 6 states. [2020-10-28 18:27:39,402 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:27:39,800 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:27:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:40,105 INFO L93 Difference]: Finished difference Result 1131 states and 1688 transitions. [2020-10-28 18:27:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:27:40,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 18:27:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:40,112 INFO L225 Difference]: With dead ends: 1131 [2020-10-28 18:27:40,112 INFO L226 Difference]: Without dead ends: 754 [2020-10-28 18:27:40,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:27:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-10-28 18:27:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 749. [2020-10-28 18:27:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-10-28 18:27:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1113 transitions. [2020-10-28 18:27:40,197 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1113 transitions. Word has length 55 [2020-10-28 18:27:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:40,197 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 1113 transitions. [2020-10-28 18:27:40,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1113 transitions. [2020-10-28 18:27:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:27:40,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:40,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:40,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:27:40,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1502868669, now seen corresponding path program 1 times [2020-10-28 18:27:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:40,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33480014] [2020-10-28 18:27:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:45,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:45,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:27:45,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:27:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:27:45,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:45,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:27:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:27:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:45,418 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:45,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:45,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:45,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:45,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:45,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:27:45,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:45,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:45,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:45,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:45,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:45,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:45,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33480014] [2020-10-28 18:27:45,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:45,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:45,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106972035] [2020-10-28 18:27:45,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:45,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:45,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:45,452 INFO L87 Difference]: Start difference. First operand 749 states and 1113 transitions. Second operand 6 states. [2020-10-28 18:27:45,657 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:27:46,054 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:27:46,231 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:27:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:46,501 INFO L93 Difference]: Finished difference Result 1319 states and 1979 transitions. [2020-10-28 18:27:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:27:46,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 18:27:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:46,508 INFO L225 Difference]: With dead ends: 1319 [2020-10-28 18:27:46,508 INFO L226 Difference]: Without dead ends: 1084 [2020-10-28 18:27:46,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:27:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2020-10-28 18:27:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 998. [2020-10-28 18:27:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2020-10-28 18:27:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1500 transitions. [2020-10-28 18:27:46,606 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1500 transitions. Word has length 55 [2020-10-28 18:27:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:46,606 INFO L481 AbstractCegarLoop]: Abstraction has 998 states and 1500 transitions. [2020-10-28 18:27:46,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1500 transitions. [2020-10-28 18:27:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:27:46,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:46,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:46,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:27:46,608 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:46,608 INFO L82 PathProgramCache]: Analyzing trace with hash -350208595, now seen corresponding path program 1 times [2020-10-28 18:27:46,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:46,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700832011] [2020-10-28 18:27:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:48,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:48,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:27:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:27:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:51,821 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:51,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:51,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:51,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:51,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:51,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:27:51,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:51,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:51,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:51,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700832011] [2020-10-28 18:27:51,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:51,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:51,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023814665] [2020-10-28 18:27:51,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:51,854 INFO L87 Difference]: Start difference. First operand 998 states and 1500 transitions. Second operand 6 states. [2020-10-28 18:27:52,045 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:27:52,613 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:27:52,808 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:27:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:53,948 INFO L93 Difference]: Finished difference Result 7284 states and 11108 transitions. [2020-10-28 18:27:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:53,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:27:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:53,984 INFO L225 Difference]: With dead ends: 7284 [2020-10-28 18:27:53,984 INFO L226 Difference]: Without dead ends: 6376 [2020-10-28 18:27:53,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:27:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2020-10-28 18:27:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 3764. [2020-10-28 18:27:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3764 states. [2020-10-28 18:27:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5686 transitions. [2020-10-28 18:27:54,425 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5686 transitions. Word has length 56 [2020-10-28 18:27:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:54,426 INFO L481 AbstractCegarLoop]: Abstraction has 3764 states and 5686 transitions. [2020-10-28 18:27:54,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5686 transitions. [2020-10-28 18:27:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:27:54,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:54,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:54,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:27:54,428 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash -156531709, now seen corresponding path program 1 times [2020-10-28 18:27:54,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:54,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493085467] [2020-10-28 18:27:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:54,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:54,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:54,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:55,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:59,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:27:59,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-28 18:27:59,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:27:59,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:59,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:59,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:59,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:27:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:59,757 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2020-10-28 18:27:59,937 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:27:59,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:59,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:59,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:59,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:27:59,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:59,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:59,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:59,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493085467] [2020-10-28 18:27:59,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:59,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:27:59,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980213160] [2020-10-28 18:27:59,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:59,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:59,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:59,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:59,977 INFO L87 Difference]: Start difference. First operand 3764 states and 5686 transitions. Second operand 8 states. [2020-10-28 18:28:00,203 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:28:00,818 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:28:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:01,806 INFO L93 Difference]: Finished difference Result 8139 states and 12360 transitions. [2020-10-28 18:28:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:28:01,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:28:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:01,830 INFO L225 Difference]: With dead ends: 8139 [2020-10-28 18:28:01,831 INFO L226 Difference]: Without dead ends: 4566 [2020-10-28 18:28:01,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:28:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2020-10-28 18:28:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 3108. [2020-10-28 18:28:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3108 states. [2020-10-28 18:28:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4699 transitions. [2020-10-28 18:28:02,382 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4699 transitions. Word has length 56 [2020-10-28 18:28:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:02,382 INFO L481 AbstractCegarLoop]: Abstraction has 3108 states and 4699 transitions. [2020-10-28 18:28:02,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:28:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4699 transitions. [2020-10-28 18:28:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:28:02,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:02,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:02,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:28:02,384 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1851690260, now seen corresponding path program 1 times [2020-10-28 18:28:02,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:02,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106492017] [2020-10-28 18:28:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:02,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:28:07,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:07,623 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:07,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:07,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:07,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:07,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:07,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:07,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:28:07,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:07,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:07,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:07,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106492017] [2020-10-28 18:28:07,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:07,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:07,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827201573] [2020-10-28 18:28:07,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:07,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:07,671 INFO L87 Difference]: Start difference. First operand 3108 states and 4699 transitions. Second operand 6 states. [2020-10-28 18:28:07,887 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:08,323 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:28:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:09,088 INFO L93 Difference]: Finished difference Result 9084 states and 13747 transitions. [2020-10-28 18:28:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:28:09,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 18:28:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:09,116 INFO L225 Difference]: With dead ends: 9084 [2020-10-28 18:28:09,116 INFO L226 Difference]: Without dead ends: 6010 [2020-10-28 18:28:09,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:28:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2020-10-28 18:28:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 6005. [2020-10-28 18:28:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6005 states. [2020-10-28 18:28:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 9005 transitions. [2020-10-28 18:28:09,903 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 9005 transitions. Word has length 57 [2020-10-28 18:28:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:09,904 INFO L481 AbstractCegarLoop]: Abstraction has 6005 states and 9005 transitions. [2020-10-28 18:28:09,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 9005 transitions. [2020-10-28 18:28:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:28:09,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:09,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:09,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:28:09,905 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1175099714, now seen corresponding path program 1 times [2020-10-28 18:28:09,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:09,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115707214] [2020-10-28 18:28:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:09,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:13,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:13,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:28:14,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:15,278 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:15,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:15,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:15,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:15,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:15,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:28:15,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:15,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:15,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:15,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:15,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:15,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:15,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115707214] [2020-10-28 18:28:15,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:15,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:28:15,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49147257] [2020-10-28 18:28:15,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:28:15,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:15,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:28:15,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:28:15,337 INFO L87 Difference]: Start difference. First operand 6005 states and 9005 transitions. Second operand 11 states. [2020-10-28 18:28:15,574 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:28:16,343 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:28:16,548 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:28:17,628 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:28:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:18,917 INFO L93 Difference]: Finished difference Result 20524 states and 30881 transitions. [2020-10-28 18:28:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:28:18,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-28 18:28:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:18,973 INFO L225 Difference]: With dead ends: 20524 [2020-10-28 18:28:18,974 INFO L226 Difference]: Without dead ends: 14731 [2020-10-28 18:28:18,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:28:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14731 states. [2020-10-28 18:28:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14731 to 6005. [2020-10-28 18:28:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6005 states. [2020-10-28 18:28:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 8996 transitions. [2020-10-28 18:28:19,989 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 8996 transitions. Word has length 58 [2020-10-28 18:28:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:19,989 INFO L481 AbstractCegarLoop]: Abstraction has 6005 states and 8996 transitions. [2020-10-28 18:28:19,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:28:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 8996 transitions. [2020-10-28 18:28:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:28:19,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:19,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:19,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:28:19,991 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2127629833, now seen corresponding path program 1 times [2020-10-28 18:28:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:19,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729500187] [2020-10-28 18:28:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:20,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:20,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:28:20,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:28:20,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-28 18:28:20,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:20,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:20,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:20,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:20,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:28:20,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:20,919 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:20,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:20,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:20,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:20,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:28:20,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:20,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:20,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:20,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729500187] [2020-10-28 18:28:20,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:20,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:20,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908012193] [2020-10-28 18:28:20,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:20,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:20,957 INFO L87 Difference]: Start difference. First operand 6005 states and 8996 transitions. Second operand 6 states. [2020-10-28 18:28:21,175 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:28:21,619 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:28:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:22,280 INFO L93 Difference]: Finished difference Result 9533 states and 14341 transitions. [2020-10-28 18:28:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:28:22,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 18:28:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:22,289 INFO L225 Difference]: With dead ends: 9533 [2020-10-28 18:28:22,290 INFO L226 Difference]: Without dead ends: 4313 [2020-10-28 18:28:22,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2020-10-28 18:28:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 3686. [2020-10-28 18:28:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3686 states. [2020-10-28 18:28:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 5491 transitions. [2020-10-28 18:28:22,838 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 5491 transitions. Word has length 58 [2020-10-28 18:28:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:22,839 INFO L481 AbstractCegarLoop]: Abstraction has 3686 states and 5491 transitions. [2020-10-28 18:28:22,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 5491 transitions. [2020-10-28 18:28:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:28:22,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:22,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:22,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:28:22,840 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:22,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1982206072, now seen corresponding path program 1 times [2020-10-28 18:28:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:22,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065630072] [2020-10-28 18:28:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:22,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:25,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:25,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:28:25,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:28:25,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2437 [2020-10-28 18:28:25,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:25,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 18:28:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:28:25,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:25,708 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:25,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:25,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:25,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:25,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:25,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:25,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:28:25,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:25,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:25,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:25,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:25,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:25,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:25,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065630072] [2020-10-28 18:28:25,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:25,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 18:28:25,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782583795] [2020-10-28 18:28:25,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 18:28:25,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 18:28:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:28:25,754 INFO L87 Difference]: Start difference. First operand 3686 states and 5491 transitions. Second operand 12 states. [2020-10-28 18:28:26,440 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2020-10-28 18:28:27,693 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:28:27,920 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:28:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:30,224 INFO L93 Difference]: Finished difference Result 14208 states and 21092 transitions. [2020-10-28 18:28:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 18:28:30,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-28 18:28:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:30,251 INFO L225 Difference]: With dead ends: 14208 [2020-10-28 18:28:30,252 INFO L226 Difference]: Without dead ends: 10736 [2020-10-28 18:28:30,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2020-10-28 18:28:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10736 states. [2020-10-28 18:28:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10736 to 3686. [2020-10-28 18:28:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3686 states. [2020-10-28 18:28:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 5490 transitions. [2020-10-28 18:28:30,925 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 5490 transitions. Word has length 59 [2020-10-28 18:28:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:30,925 INFO L481 AbstractCegarLoop]: Abstraction has 3686 states and 5490 transitions. [2020-10-28 18:28:30,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 18:28:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 5490 transitions. [2020-10-28 18:28:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:28:30,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:30,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:30,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:28:30,936 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash -974140147, now seen corresponding path program 1 times [2020-10-28 18:28:30,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:30,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695736642] [2020-10-28 18:28:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:30,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:31,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:33,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:33,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:34,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:34,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:34,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:35,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:28:35,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:36,292 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:36,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:36,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:36,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:28:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:36,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:36,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695736642] [2020-10-28 18:28:36,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:36,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:28:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722718690] [2020-10-28 18:28:36,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:28:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:36,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:28:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:28:36,332 INFO L87 Difference]: Start difference. First operand 3686 states and 5490 transitions. Second operand 11 states. [2020-10-28 18:28:36,569 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:28:37,406 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:28:37,618 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:28:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:38,867 INFO L93 Difference]: Finished difference Result 7952 states and 11832 transitions. [2020-10-28 18:28:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:28:38,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 18:28:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:38,878 INFO L225 Difference]: With dead ends: 7952 [2020-10-28 18:28:38,878 INFO L226 Difference]: Without dead ends: 4461 [2020-10-28 18:28:38,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2020-10-28 18:28:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2020-10-28 18:28:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3686. [2020-10-28 18:28:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3686 states. [2020-10-28 18:28:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 5488 transitions. [2020-10-28 18:28:39,536 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 5488 transitions. Word has length 59 [2020-10-28 18:28:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:39,537 INFO L481 AbstractCegarLoop]: Abstraction has 3686 states and 5488 transitions. [2020-10-28 18:28:39,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:28:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 5488 transitions. [2020-10-28 18:28:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:28:39,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:39,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:39,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:28:39,538 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:39,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:39,538 INFO L82 PathProgramCache]: Analyzing trace with hash -336026102, now seen corresponding path program 1 times [2020-10-28 18:28:39,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:39,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502748069] [2020-10-28 18:28:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:39,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:40,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:28:40,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:40,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1246 [2020-10-28 18:28:40,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:40,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:40,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:28:40,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:40,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:28:40,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:41,318 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:41,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:41,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:41,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:41,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:41,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:41,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:28:41,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:41,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:41,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:41,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502748069] [2020-10-28 18:28:41,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:41,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:28:41,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075758201] [2020-10-28 18:28:41,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:28:41,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:28:41,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:41,347 INFO L87 Difference]: Start difference. First operand 3686 states and 5488 transitions. Second operand 10 states. [2020-10-28 18:28:41,607 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:28:42,564 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:28:42,767 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:28:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:44,207 INFO L93 Difference]: Finished difference Result 7630 states and 11433 transitions. [2020-10-28 18:28:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:28:44,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 18:28:44,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:44,216 INFO L225 Difference]: With dead ends: 7630 [2020-10-28 18:28:44,217 INFO L226 Difference]: Without dead ends: 5403 [2020-10-28 18:28:44,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:28:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2020-10-28 18:28:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 3654. [2020-10-28 18:28:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3654 states. [2020-10-28 18:28:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3654 states to 3654 states and 5440 transitions. [2020-10-28 18:28:45,020 INFO L78 Accepts]: Start accepts. Automaton has 3654 states and 5440 transitions. Word has length 60 [2020-10-28 18:28:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:45,020 INFO L481 AbstractCegarLoop]: Abstraction has 3654 states and 5440 transitions. [2020-10-28 18:28:45,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:28:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3654 states and 5440 transitions. [2020-10-28 18:28:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:28:45,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:45,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:45,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:28:45,021 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash 758056329, now seen corresponding path program 1 times [2020-10-28 18:28:45,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:45,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255618027] [2020-10-28 18:28:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:45,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:46,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:28:46,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-28 18:28:46,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:46,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:28:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:28:46,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:46,824 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:46,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:46,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:46,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:46,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:46,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:28:46,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:46,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:46,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:46,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:46,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:46,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:46,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255618027] [2020-10-28 18:28:46,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:46,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:28:46,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608890758] [2020-10-28 18:28:46,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:28:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:28:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:46,854 INFO L87 Difference]: Start difference. First operand 3654 states and 5440 transitions. Second operand 10 states. [2020-10-28 18:28:47,224 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:28:48,385 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:28:49,460 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:28:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:50,051 INFO L93 Difference]: Finished difference Result 6466 states and 9680 transitions. [2020-10-28 18:28:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:28:50,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 18:28:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:50,057 INFO L225 Difference]: With dead ends: 6466 [2020-10-28 18:28:50,058 INFO L226 Difference]: Without dead ends: 4230 [2020-10-28 18:28:50,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-28 18:28:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2020-10-28 18:28:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 3611. [2020-10-28 18:28:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3611 states. [2020-10-28 18:28:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 5385 transitions. [2020-10-28 18:28:51,456 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 5385 transitions. Word has length 60 [2020-10-28 18:28:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:51,457 INFO L481 AbstractCegarLoop]: Abstraction has 3611 states and 5385 transitions. [2020-10-28 18:28:51,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:28:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 5385 transitions. [2020-10-28 18:28:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:28:51,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:51,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:51,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:28:51,458 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash 296738184, now seen corresponding path program 1 times [2020-10-28 18:28:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:51,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349125963] [2020-10-28 18:28:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:51,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:51,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:52,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:28:52,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:52,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-28 18:28:52,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:52,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:28:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:28:52,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:52,943 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:52,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:52,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:52,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:52,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:52,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349125963] [2020-10-28 18:28:52,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:52,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:28:52,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768656155] [2020-10-28 18:28:52,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:28:52,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:52,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:28:52,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:28:52,972 INFO L87 Difference]: Start difference. First operand 3611 states and 5385 transitions. Second operand 9 states. [2020-10-28 18:28:53,210 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:28:54,768 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:28:55,283 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2020-10-28 18:28:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:56,284 INFO L93 Difference]: Finished difference Result 6571 states and 9833 transitions. [2020-10-28 18:28:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:28:56,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-28 18:28:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:56,289 INFO L225 Difference]: With dead ends: 6571 [2020-10-28 18:28:56,289 INFO L226 Difference]: Without dead ends: 5295 [2020-10-28 18:28:56,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:28:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2020-10-28 18:28:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 3570. [2020-10-28 18:28:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3570 states. [2020-10-28 18:28:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3570 states to 3570 states and 5336 transitions. [2020-10-28 18:28:57,353 INFO L78 Accepts]: Start accepts. Automaton has 3570 states and 5336 transitions. Word has length 60 [2020-10-28 18:28:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:57,354 INFO L481 AbstractCegarLoop]: Abstraction has 3570 states and 5336 transitions. [2020-10-28 18:28:57,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:28:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3570 states and 5336 transitions. [2020-10-28 18:28:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:28:57,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:57,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:57,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:28:57,357 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2000494173, now seen corresponding path program 1 times [2020-10-28 18:28:57,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:57,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716994659] [2020-10-28 18:28:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:57,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:57,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:57,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:57,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:58,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:02,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:29:02,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:29:02,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:29:02,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:02,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:29:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:29:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 18:29:02,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:02,605 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:29:02,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:02,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:02,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:02,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:02,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:29:02,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:02,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:02,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:02,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:02,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:02,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:02,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716994659] [2020-10-28 18:29:02,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:02,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:29:02,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719362275] [2020-10-28 18:29:02,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:29:02,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:29:02,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:02,634 INFO L87 Difference]: Start difference. First operand 3570 states and 5336 transitions. Second operand 5 states. [2020-10-28 18:29:02,865 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:03,825 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:29:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:04,898 INFO L93 Difference]: Finished difference Result 9180 states and 13720 transitions. [2020-10-28 18:29:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:29:04,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-28 18:29:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:04,905 INFO L225 Difference]: With dead ends: 9180 [2020-10-28 18:29:04,905 INFO L226 Difference]: Without dead ends: 5733 [2020-10-28 18:29:04,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:29:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2020-10-28 18:29:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 5666. [2020-10-28 18:29:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5666 states. [2020-10-28 18:29:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 8296 transitions. [2020-10-28 18:29:06,451 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 8296 transitions. Word has length 80 [2020-10-28 18:29:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:06,451 INFO L481 AbstractCegarLoop]: Abstraction has 5666 states and 8296 transitions. [2020-10-28 18:29:06,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:29:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 8296 transitions. [2020-10-28 18:29:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:29:06,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:06,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:06,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:29:06,455 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1306605347, now seen corresponding path program 1 times [2020-10-28 18:29:06,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:06,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840773394] [2020-10-28 18:29:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:06,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:06,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:06,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:08,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:11,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:29:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:11,684 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:29:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:11,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:11,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:11,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:11,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:11,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:11,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:11,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:11,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:11,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840773394] [2020-10-28 18:29:11,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:11,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:11,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424456718] [2020-10-28 18:29:11,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:11,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:11,717 INFO L87 Difference]: Start difference. First operand 5666 states and 8296 transitions. Second operand 4 states. [2020-10-28 18:29:11,914 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:29:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:15,119 INFO L93 Difference]: Finished difference Result 16144 states and 23564 transitions. [2020-10-28 18:29:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:15,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 18:29:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:15,133 INFO L225 Difference]: With dead ends: 16144 [2020-10-28 18:29:15,134 INFO L226 Difference]: Without dead ends: 10601 [2020-10-28 18:29:15,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10601 states. [2020-10-28 18:29:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10601 to 10142. [2020-10-28 18:29:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10142 states. [2020-10-28 18:29:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10142 states to 10142 states and 14712 transitions. [2020-10-28 18:29:17,901 INFO L78 Accepts]: Start accepts. Automaton has 10142 states and 14712 transitions. Word has length 81 [2020-10-28 18:29:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:17,902 INFO L481 AbstractCegarLoop]: Abstraction has 10142 states and 14712 transitions. [2020-10-28 18:29:17,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10142 states and 14712 transitions. [2020-10-28 18:29:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:29:17,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:17,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:17,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:29:17,905 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash -669308271, now seen corresponding path program 1 times [2020-10-28 18:29:17,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:17,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308498915] [2020-10-28 18:29:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:22,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:29:22,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:29:22,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:29:22,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:22,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:29:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 18:29:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:29:22,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:23,116 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:29:23,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:23,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:23,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:23,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:23,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:29:23,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:23,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:23,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:23,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:23,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:23,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308498915] [2020-10-28 18:29:23,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:23,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:29:23,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741343853] [2020-10-28 18:29:23,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:29:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:23,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:29:23,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:23,147 INFO L87 Difference]: Start difference. First operand 10142 states and 14712 transitions. Second operand 5 states. [2020-10-28 18:29:23,326 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:29:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:26,500 INFO L93 Difference]: Finished difference Result 20414 states and 29652 transitions. [2020-10-28 18:29:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:29:26,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 18:29:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:26,511 INFO L225 Difference]: With dead ends: 20414 [2020-10-28 18:29:26,511 INFO L226 Difference]: Without dead ends: 10395 [2020-10-28 18:29:26,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:29:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2020-10-28 18:29:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 10118. [2020-10-28 18:29:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10118 states. [2020-10-28 18:29:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10118 states to 10118 states and 14688 transitions. [2020-10-28 18:29:29,379 INFO L78 Accepts]: Start accepts. Automaton has 10118 states and 14688 transitions. Word has length 82 [2020-10-28 18:29:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:29,379 INFO L481 AbstractCegarLoop]: Abstraction has 10118 states and 14688 transitions. [2020-10-28 18:29:29,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:29:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand 10118 states and 14688 transitions. [2020-10-28 18:29:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:29:29,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:29,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:29,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:29:29,381 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1783628492, now seen corresponding path program 1 times [2020-10-28 18:29:29,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:29,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971239189] [2020-10-28 18:29:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:29,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:30,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:32,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:32,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:29:32,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:29:32,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3560 [2020-10-28 18:29:32,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:32,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:32,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:32,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 18:29:32,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:29:32,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:33,166 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:29:33,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:33,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:33,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:33,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:33,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:33,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:29:33,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:33,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:33,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:33,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:33,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:33,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:33,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971239189] [2020-10-28 18:29:33,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:33,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:33,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410543893] [2020-10-28 18:29:33,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:33,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:33,191 INFO L87 Difference]: Start difference. First operand 10118 states and 14688 transitions. Second operand 4 states. [2020-10-28 18:29:33,399 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:29:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:39,048 INFO L93 Difference]: Finished difference Result 28940 states and 41724 transitions. [2020-10-28 18:29:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:39,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 18:29:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:39,068 INFO L225 Difference]: With dead ends: 28940 [2020-10-28 18:29:39,068 INFO L226 Difference]: Without dead ends: 18921 [2020-10-28 18:29:39,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18921 states. [2020-10-28 18:29:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18921 to 17854. [2020-10-28 18:29:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17854 states. [2020-10-28 18:29:44,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 25468 transitions. [2020-10-28 18:29:44,213 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 25468 transitions. Word has length 82 [2020-10-28 18:29:44,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:44,213 INFO L481 AbstractCegarLoop]: Abstraction has 17854 states and 25468 transitions. [2020-10-28 18:29:44,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 25468 transitions. [2020-10-28 18:29:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:29:44,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:44,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:44,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:29:44,215 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:44,216 INFO L82 PathProgramCache]: Analyzing trace with hash 443772718, now seen corresponding path program 1 times [2020-10-28 18:29:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:44,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735994303] [2020-10-28 18:29:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3107 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 18:29:47,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:47,584 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:29:47,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:47,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:47,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:47,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:47,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:47,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:47,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:47,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:47,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735994303] [2020-10-28 18:29:47,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:47,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:29:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853217091] [2020-10-28 18:29:47,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:47,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:47,611 INFO L87 Difference]: Start difference. First operand 17854 states and 25468 transitions. Second operand 6 states. [2020-10-28 18:29:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:57,247 INFO L93 Difference]: Finished difference Result 31167 states and 44122 transitions. [2020-10-28 18:29:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:29:57,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 18:29:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:57,287 INFO L225 Difference]: With dead ends: 31167 [2020-10-28 18:29:57,287 INFO L226 Difference]: Without dead ends: 31164 [2020-10-28 18:29:57,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:29:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31164 states. [2020-10-28 18:30:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31164 to 18814. [2020-10-28 18:30:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18814 states. [2020-10-28 18:30:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18814 states to 18814 states and 26300 transitions. [2020-10-28 18:30:03,141 INFO L78 Accepts]: Start accepts. Automaton has 18814 states and 26300 transitions. Word has length 83 [2020-10-28 18:30:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:03,142 INFO L481 AbstractCegarLoop]: Abstraction has 18814 states and 26300 transitions. [2020-10-28 18:30:03,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:30:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 18814 states and 26300 transitions. [2020-10-28 18:30:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:30:03,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:03,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:03,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 18:30:03,143 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:03,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:03,144 INFO L82 PathProgramCache]: Analyzing trace with hash 797355847, now seen corresponding path program 1 times [2020-10-28 18:30:03,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:03,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199192174] [2020-10-28 18:30:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:03,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:06,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:07,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:07,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:30:07,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:07,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4220 [2020-10-28 18:30:07,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:07,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 18:30:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:30:07,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:07,593 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:30:07,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:07,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:07,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:07,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:07,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:07,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:30:07,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:07,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:07,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:07,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199192174] [2020-10-28 18:30:07,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:07,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:07,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943009510] [2020-10-28 18:30:07,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:07,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:07,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:07,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:07,618 INFO L87 Difference]: Start difference. First operand 18814 states and 26300 transitions. Second operand 4 states. [2020-10-28 18:30:07,821 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:30:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:16,663 INFO L93 Difference]: Finished difference Result 41104 states and 57926 transitions. [2020-10-28 18:30:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:16,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 18:30:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:16,696 INFO L225 Difference]: With dead ends: 41104 [2020-10-28 18:30:16,697 INFO L226 Difference]: Without dead ends: 28913 [2020-10-28 18:30:16,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28913 states. [2020-10-28 18:30:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28913 to 27486. [2020-10-28 18:30:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27486 states. [2020-10-28 18:30:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 38052 transitions. [2020-10-28 18:30:25,075 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 38052 transitions. Word has length 84 [2020-10-28 18:30:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 27486 states and 38052 transitions. [2020-10-28 18:30:25,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 38052 transitions. [2020-10-28 18:30:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 18:30:25,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:25,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:25,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 18:30:25,081 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2039796199, now seen corresponding path program 1 times [2020-10-28 18:30:25,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:25,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732508318] [2020-10-28 18:30:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:25,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:25,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:25,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:25,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:30:30,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:30,315 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:30:30,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:30,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:30,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:30,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:30,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:30,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:30:30,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:30,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:30,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:30,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:30,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:30,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:30,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732508318] [2020-10-28 18:30:30,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:30,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:30,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241384991] [2020-10-28 18:30:30,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:30,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:30,341 INFO L87 Difference]: Start difference. First operand 27486 states and 38052 transitions. Second operand 4 states. [2020-10-28 18:30:33,274 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:30:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:37,477 INFO L93 Difference]: Finished difference Result 48442 states and 67468 transitions. [2020-10-28 18:30:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:37,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 18:30:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:37,500 INFO L225 Difference]: With dead ends: 48442 [2020-10-28 18:30:37,500 INFO L226 Difference]: Without dead ends: 21063 [2020-10-28 18:30:37,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21063 states. [2020-10-28 18:30:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21063 to 21060. [2020-10-28 18:30:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21060 states. [2020-10-28 18:30:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21060 states to 21060 states and 29172 transitions. [2020-10-28 18:30:44,499 INFO L78 Accepts]: Start accepts. Automaton has 21060 states and 29172 transitions. Word has length 105 [2020-10-28 18:30:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:44,500 INFO L481 AbstractCegarLoop]: Abstraction has 21060 states and 29172 transitions. [2020-10-28 18:30:44,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21060 states and 29172 transitions. [2020-10-28 18:30:44,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 18:30:44,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:44,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:44,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 18:30:44,503 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:44,503 INFO L82 PathProgramCache]: Analyzing trace with hash -38786115, now seen corresponding path program 1 times [2020-10-28 18:30:44,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:44,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734550029] [2020-10-28 18:30:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:44,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:44,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:44,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:45,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:45,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:45,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking...