/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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:13:17,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:13:17,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:13:17,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:13:17,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:13:17,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:13:17,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:13:17,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:13:17,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:13:17,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:13:17,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:13:17,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:13:17,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:13:17,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:13:17,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:13:17,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:13:17,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:13:17,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:13:17,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:13:17,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:13:17,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:13:17,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:13:17,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:13:17,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:13:17,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:13:17,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:13:17,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:13:17,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:13:17,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:13:17,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:13:17,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:13:17,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:13:17,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:13:17,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:13:17,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:13:17,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:13:17,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:13:17,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:13:17,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:13:17,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:13:17,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:13:17,554 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 19:13:17,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:13:17,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:13:17,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:13:17,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:13:17,591 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:13:17,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:13:17,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:13:17,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:13:17,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:13:17,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:13:17,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:13:17,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:13:17,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:13:17,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:13:17,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:13:17,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:13:17,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:13:17,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:13:17,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:13:17,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:13:17,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:13:17,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:13:17,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:13:17,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:13:17,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:13:17,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:13:17,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:13:17,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:13:17,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:13:17,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:13:18,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:13:18,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:13:18,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:13:18,113 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:13:18,114 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:13:18,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:13:18,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72a312702/68b00105ba3c4713856139f9492c8246/FLAGa26467ad7 [2020-10-28 19:13:18,826 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:13:18,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:13:18,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72a312702/68b00105ba3c4713856139f9492c8246/FLAGa26467ad7 [2020-10-28 19:13:19,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72a312702/68b00105ba3c4713856139f9492c8246 [2020-10-28 19:13:19,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:13:19,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:13:19,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:13:19,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:13:19,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:13:19,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5886bcf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19, skipping insertion in model container [2020-10-28 19:13:19,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:13:19,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:13:19,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:13:19,725 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:13:19,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:13:19,919 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:13:19,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19 WrapperNode [2020-10-28 19:13:19,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:13:19,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:13:19,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:13:19,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:13:19,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (1/1) ... [2020-10-28 19:13:19,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:13:19,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:13:19,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:13:19,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:13:19,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (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 19:13:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:13:20,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:13:20,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:13:20,096 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:13:20,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:13:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:13:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:13:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:13:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:13:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:13:20,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:13:20,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:13:20,099 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:13:20,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:13:20,100 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:13:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:13:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:13:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:13:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:13:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:13:20,102 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:13:20,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:13:20,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:13:20,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:13:20,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:13:20,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:13:20,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:13:20,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:13:21,118 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:13:21,118 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:13:21,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:13:21 BoogieIcfgContainer [2020-10-28 19:13:21,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:13:21,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:13:21,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:13:21,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:13:21,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:13:19" (1/3) ... [2020-10-28 19:13:21,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69418104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:13:21, skipping insertion in model container [2020-10-28 19:13:21,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:19" (2/3) ... [2020-10-28 19:13:21,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69418104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:13:21, skipping insertion in model container [2020-10-28 19:13:21,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:13:21" (3/3) ... [2020-10-28 19:13:21,132 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:13:21,145 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:13:21,151 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:13:21,165 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:13:21,196 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:13:21,196 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:13:21,197 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:13:21,197 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:13:21,197 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:13:21,197 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:13:21,197 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:13:21,197 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:13:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-10-28 19:13:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 19:13:21,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:21,234 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] [2020-10-28 19:13:21,235 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:21,241 INFO L82 PathProgramCache]: Analyzing trace with hash 110987728, now seen corresponding path program 1 times [2020-10-28 19:13:21,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:21,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124150217] [2020-10-28 19:13:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:21,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:22,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:24,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:24,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 19:13:24,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:13:24,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3051 [2020-10-28 19:13:24,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:24,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:24,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:13:24,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 19:13:24,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:13:24,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:13:25,316 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:13:25,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:25,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:25,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:25,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:25,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:25,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:13:25,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:25,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:13:25,404 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 19:13:25,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124150217] [2020-10-28 19:13:25,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:25,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:13:25,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842140172] [2020-10-28 19:13:25,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:13:25,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:13:25,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:13:25,440 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2020-10-28 19:13:25,867 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:13:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:26,977 INFO L93 Difference]: Finished difference Result 356 states and 590 transitions. [2020-10-28 19:13:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:13:26,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 19:13:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:26,992 INFO L225 Difference]: With dead ends: 356 [2020-10-28 19:13:26,993 INFO L226 Difference]: Without dead ends: 245 [2020-10-28 19:13:27,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-28 19:13:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2020-10-28 19:13:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 19:13:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 378 transitions. [2020-10-28 19:13:27,078 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 378 transitions. Word has length 67 [2020-10-28 19:13:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:27,079 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 378 transitions. [2020-10-28 19:13:27,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:13:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 378 transitions. [2020-10-28 19:13:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:13:27,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:27,083 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] [2020-10-28 19:13:27,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:13:27,084 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:27,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash 616229487, now seen corresponding path program 1 times [2020-10-28 19:13:27,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:27,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985787779] [2020-10-28 19:13:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:27,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:27,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:27,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:29,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:32,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:32,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:13:32,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:13:32,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 19:13:32,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:32,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:32,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:32,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:13:32,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 19:13:32,653 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:13:32,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:32,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:32,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:32,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:13:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:32,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:13:32,711 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 19:13:32,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985787779] [2020-10-28 19:13:32,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:32,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:32,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052414628] [2020-10-28 19:13:32,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:32,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:32,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:32,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:32,715 INFO L87 Difference]: Start difference. First operand 241 states and 378 transitions. Second operand 5 states. [2020-10-28 19:13:34,212 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:13:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:34,353 INFO L93 Difference]: Finished difference Result 640 states and 1021 transitions. [2020-10-28 19:13:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:34,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 19:13:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:34,359 INFO L225 Difference]: With dead ends: 640 [2020-10-28 19:13:34,360 INFO L226 Difference]: Without dead ends: 460 [2020-10-28 19:13:34,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:13:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-28 19:13:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 457. [2020-10-28 19:13:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-10-28 19:13:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 716 transitions. [2020-10-28 19:13:34,448 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 716 transitions. Word has length 69 [2020-10-28 19:13:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:34,448 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 716 transitions. [2020-10-28 19:13:34,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 716 transitions. [2020-10-28 19:13:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:13:34,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:34,454 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] [2020-10-28 19:13:34,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:13:34,454 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:34,455 INFO L82 PathProgramCache]: Analyzing trace with hash -377940500, now seen corresponding path program 1 times [2020-10-28 19:13:34,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:34,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295670038] [2020-10-28 19:13:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:34,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:34,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:34,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:34,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:39,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:39,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:13:39,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:13:39,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4755 [2020-10-28 19:13:39,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:39,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:39,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:13:39,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:39,674 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:13:39,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:39,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:39,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:39,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:39,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:13:39,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:39,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:13:39,753 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 19:13:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295670038] [2020-10-28 19:13:39,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:39,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:39,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887746285] [2020-10-28 19:13:39,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:39,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:39,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:39,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:39,756 INFO L87 Difference]: Start difference. First operand 457 states and 716 transitions. Second operand 5 states. [2020-10-28 19:13:41,079 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:13:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:41,212 INFO L93 Difference]: Finished difference Result 1208 states and 1920 transitions. [2020-10-28 19:13:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:41,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:13:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:41,223 INFO L225 Difference]: With dead ends: 1208 [2020-10-28 19:13:41,224 INFO L226 Difference]: Without dead ends: 863 [2020-10-28 19:13:41,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:13:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-10-28 19:13:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 860. [2020-10-28 19:13:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-10-28 19:13:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1338 transitions. [2020-10-28 19:13:41,346 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1338 transitions. Word has length 70 [2020-10-28 19:13:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:41,346 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1338 transitions. [2020-10-28 19:13:41,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1338 transitions. [2020-10-28 19:13:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:13:41,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:41,353 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] [2020-10-28 19:13:41,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:13:41,353 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1895012702, now seen corresponding path program 1 times [2020-10-28 19:13:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:41,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495932222] [2020-10-28 19:13:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:41,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:41,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:41,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:43,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:43,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:13:43,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:13:43,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-28 19:13:43,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:43,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:13:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 19:13:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:13:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:43,638 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:13:43,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:43,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:43,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:43,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:43,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:43,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:13:43,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:43,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:43,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:43,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:43,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:43,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:43,690 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 19:13:43,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495932222] [2020-10-28 19:13:43,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:43,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:13:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089881777] [2020-10-28 19:13:43,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:13:43,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:13:43,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:13:43,693 INFO L87 Difference]: Start difference. First operand 860 states and 1338 transitions. Second operand 4 states. [2020-10-28 19:13:44,074 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:13:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:45,051 INFO L93 Difference]: Finished difference Result 2126 states and 3426 transitions. [2020-10-28 19:13:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:13:45,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:13:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:45,062 INFO L225 Difference]: With dead ends: 2126 [2020-10-28 19:13:45,062 INFO L226 Difference]: Without dead ends: 1463 [2020-10-28 19:13:45,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-10-28 19:13:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1452. [2020-10-28 19:13:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1452 states. [2020-10-28 19:13:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2306 transitions. [2020-10-28 19:13:45,210 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2306 transitions. Word has length 71 [2020-10-28 19:13:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:45,210 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 2306 transitions. [2020-10-28 19:13:45,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:13:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2306 transitions. [2020-10-28 19:13:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:13:45,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:45,214 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] [2020-10-28 19:13:45,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:13:45,214 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:45,215 INFO L82 PathProgramCache]: Analyzing trace with hash -239144511, now seen corresponding path program 1 times [2020-10-28 19:13:45,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:45,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440881565] [2020-10-28 19:13:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:45,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:45,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:45,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:45,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:46,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:50,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:50,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:13:50,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:13:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:13:50,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:50,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:13:50,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:13:50,758 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:13:50,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:50,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:50,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:50,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:50,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:50,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:13:50,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:50,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:50,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:50,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:50,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:50,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:13:50,825 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 19:13:50,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440881565] [2020-10-28 19:13:50,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:50,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:50,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454309024] [2020-10-28 19:13:50,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:50,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:50,828 INFO L87 Difference]: Start difference. First operand 1452 states and 2306 transitions. Second operand 5 states. [2020-10-28 19:13:52,347 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:13:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:52,677 INFO L93 Difference]: Finished difference Result 4037 states and 6474 transitions. [2020-10-28 19:13:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:13:52,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 19:13:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:52,695 INFO L225 Difference]: With dead ends: 4037 [2020-10-28 19:13:52,695 INFO L226 Difference]: Without dead ends: 2782 [2020-10-28 19:13:52,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:13:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2020-10-28 19:13:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 2779. [2020-10-28 19:13:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2779 states. [2020-10-28 19:13:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 4386 transitions. [2020-10-28 19:13:52,991 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 4386 transitions. Word has length 73 [2020-10-28 19:13:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:52,996 INFO L481 AbstractCegarLoop]: Abstraction has 2779 states and 4386 transitions. [2020-10-28 19:13:52,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:13:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 4386 transitions. [2020-10-28 19:13:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:13:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:53,002 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] [2020-10-28 19:13:53,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:13:53,002 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1001640269, now seen corresponding path program 1 times [2020-10-28 19:13:53,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:53,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119991709] [2020-10-28 19:13:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:53,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:54,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:57,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:57,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:13:57,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:13:57,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4564 [2020-10-28 19:13:57,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:57,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:57,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:13:57,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:13:57,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:13:57,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:13:58,027 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:13:58,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:58,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:58,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:58,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:58,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:58,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:58,085 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 19:13:58,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119991709] [2020-10-28 19:13:58,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:58,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:13:58,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648519884] [2020-10-28 19:13:58,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:13:58,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:13:58,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:58,087 INFO L87 Difference]: Start difference. First operand 2779 states and 4386 transitions. Second operand 5 states. [2020-10-28 19:13:59,761 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:14:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:00,216 INFO L93 Difference]: Finished difference Result 7881 states and 12481 transitions. [2020-10-28 19:14:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:00,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:14:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:00,246 INFO L225 Difference]: With dead ends: 7881 [2020-10-28 19:14:00,247 INFO L226 Difference]: Without dead ends: 5323 [2020-10-28 19:14:00,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2020-10-28 19:14:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5320. [2020-10-28 19:14:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5320 states. [2020-10-28 19:14:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 8311 transitions. [2020-10-28 19:14:00,829 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 8311 transitions. Word has length 74 [2020-10-28 19:14:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:00,829 INFO L481 AbstractCegarLoop]: Abstraction has 5320 states and 8311 transitions. [2020-10-28 19:14:00,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 8311 transitions. [2020-10-28 19:14:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 19:14:00,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:00,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:14:00,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:14:00,841 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash 346334016, now seen corresponding path program 1 times [2020-10-28 19:14:00,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:00,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275122564] [2020-10-28 19:14:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:00,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:00,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:00,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:01,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:01,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:05,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:05,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:14:05,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:14:05,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:14:05,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:05,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:05,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:14:05,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 19:14:05,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 19:14:05,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:06,326 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:14:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:06,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:06,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:06,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:06,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:06,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:14:06,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:06,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:06,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:14:06,392 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 19:14:06,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275122564] [2020-10-28 19:14:06,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:06,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:14:06,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551497447] [2020-10-28 19:14:06,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:14:06,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:06,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:14:06,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:14:06,397 INFO L87 Difference]: Start difference. First operand 5320 states and 8311 transitions. Second operand 4 states. [2020-10-28 19:14:06,822 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:14:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:08,252 INFO L93 Difference]: Finished difference Result 14030 states and 22395 transitions. [2020-10-28 19:14:08,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:14:08,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 19:14:08,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:08,305 INFO L225 Difference]: With dead ends: 14030 [2020-10-28 19:14:08,305 INFO L226 Difference]: Without dead ends: 9387 [2020-10-28 19:14:08,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9387 states. [2020-10-28 19:14:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9387 to 9320. [2020-10-28 19:14:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2020-10-28 19:14:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 14423 transitions. [2020-10-28 19:14:09,379 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 14423 transitions. Word has length 75 [2020-10-28 19:14:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:09,379 INFO L481 AbstractCegarLoop]: Abstraction has 9320 states and 14423 transitions. [2020-10-28 19:14:09,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:14:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 14423 transitions. [2020-10-28 19:14:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 19:14:09,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:09,388 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] [2020-10-28 19:14:09,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:14:09,388 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash 33697567, now seen corresponding path program 1 times [2020-10-28 19:14:09,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:09,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919762346] [2020-10-28 19:14:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:09,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:09,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:09,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:09,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:10,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:13,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:14,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:14,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 19:14:14,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:14:14,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:14:14,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:14,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 19:14:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:14,982 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:14:14,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:14,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:15,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:15,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:15,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:15,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:14:15,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:15,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:15,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:15,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:15,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:15,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:14:15,039 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 19:14:15,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919762346] [2020-10-28 19:14:15,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:15,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:15,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888629852] [2020-10-28 19:14:15,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:15,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:15,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:15,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:15,049 INFO L87 Difference]: Start difference. First operand 9320 states and 14423 transitions. Second operand 5 states. [2020-10-28 19:14:16,742 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:14:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:17,774 INFO L93 Difference]: Finished difference Result 26822 states and 41563 transitions. [2020-10-28 19:14:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:17,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-28 19:14:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:17,840 INFO L225 Difference]: With dead ends: 26822 [2020-10-28 19:14:17,841 INFO L226 Difference]: Without dead ends: 17874 [2020-10-28 19:14:17,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17874 states. [2020-10-28 19:14:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17874 to 17871. [2020-10-28 19:14:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17871 states. [2020-10-28 19:14:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17871 states to 17871 states and 27392 transitions. [2020-10-28 19:14:19,495 INFO L78 Accepts]: Start accepts. Automaton has 17871 states and 27392 transitions. Word has length 77 [2020-10-28 19:14:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:19,495 INFO L481 AbstractCegarLoop]: Abstraction has 17871 states and 27392 transitions. [2020-10-28 19:14:19,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17871 states and 27392 transitions. [2020-10-28 19:14:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:14:19,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:19,511 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] [2020-10-28 19:14:19,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:14:19,511 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash -451519928, now seen corresponding path program 1 times [2020-10-28 19:14:19,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:19,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319083029] [2020-10-28 19:14:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:19,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:21,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:23,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:24,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:24,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:14:24,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:14:24,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:14:24,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:24,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 19:14:24,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:24,920 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:14:24,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:24,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:24,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:24,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:24,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:24,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:14:24,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:24,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:24,973 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 19:14:24,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319083029] [2020-10-28 19:14:24,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:24,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:24,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799390188] [2020-10-28 19:14:24,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:24,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:24,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:24,976 INFO L87 Difference]: Start difference. First operand 17871 states and 27392 transitions. Second operand 5 states. [2020-10-28 19:14:27,328 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:14:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:29,319 INFO L93 Difference]: Finished difference Result 51903 states and 79459 transitions. [2020-10-28 19:14:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:29,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:14:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:29,412 INFO L225 Difference]: With dead ends: 51903 [2020-10-28 19:14:29,412 INFO L226 Difference]: Without dead ends: 34298 [2020-10-28 19:14:29,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34298 states. [2020-10-28 19:14:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34298 to 34295. [2020-10-28 19:14:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34295 states. [2020-10-28 19:14:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34295 states to 34295 states and 52019 transitions. [2020-10-28 19:14:32,544 INFO L78 Accepts]: Start accepts. Automaton has 34295 states and 52019 transitions. Word has length 78 [2020-10-28 19:14:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:32,544 INFO L481 AbstractCegarLoop]: Abstraction has 34295 states and 52019 transitions. [2020-10-28 19:14:32,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34295 states and 52019 transitions. [2020-10-28 19:14:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:14:32,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:32,570 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] [2020-10-28 19:14:32,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:14:32,571 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:32,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1070366841, now seen corresponding path program 1 times [2020-10-28 19:14:32,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:32,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498552114] [2020-10-28 19:14:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:32,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:32,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:35,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:35,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:37,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:37,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:14:37,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:14:37,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:14:37,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:37,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:37,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 19:14:37,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:38,006 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:14:38,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:38,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:38,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:38,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:38,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:38,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:14:38,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:38,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:38,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:38,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:38,050 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 19:14:38,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498552114] [2020-10-28 19:14:38,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:38,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070072643] [2020-10-28 19:14:38,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:38,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:38,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:38,052 INFO L87 Difference]: Start difference. First operand 34295 states and 52019 transitions. Second operand 5 states. [2020-10-28 19:14:38,396 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:14:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:42,583 INFO L93 Difference]: Finished difference Result 56998 states and 86211 transitions. [2020-10-28 19:14:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:42,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:14:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:42,683 INFO L225 Difference]: With dead ends: 56998 [2020-10-28 19:14:42,684 INFO L226 Difference]: Without dead ends: 39141 [2020-10-28 19:14:42,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:14:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39141 states. [2020-10-28 19:14:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39141 to 39138. [2020-10-28 19:14:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39138 states. [2020-10-28 19:14:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39138 states to 39138 states and 58573 transitions. [2020-10-28 19:14:46,536 INFO L78 Accepts]: Start accepts. Automaton has 39138 states and 58573 transitions. Word has length 79 [2020-10-28 19:14:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:46,536 INFO L481 AbstractCegarLoop]: Abstraction has 39138 states and 58573 transitions. [2020-10-28 19:14:46,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 39138 states and 58573 transitions. [2020-10-28 19:14:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:14:46,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:46,564 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] [2020-10-28 19:14:46,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:14:46,565 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2088881698, now seen corresponding path program 1 times [2020-10-28 19:14:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:46,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091796337] [2020-10-28 19:14:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:46,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:46,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:51,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:51,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:14:51,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:14:51,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:14:51,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:51,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 19:14:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:14:51,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:51,979 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:14:51,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:51,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:51,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:51,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:51,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:51,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:14:51,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:51,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:51,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:52,014 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 19:14:52,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091796337] [2020-10-28 19:14:52,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:52,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:52,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748763996] [2020-10-28 19:14:52,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:52,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:52,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:52,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:52,017 INFO L87 Difference]: Start difference. First operand 39138 states and 58573 transitions. Second operand 5 states. [2020-10-28 19:14:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:55,218 INFO L93 Difference]: Finished difference Result 63475 states and 95053 transitions. [2020-10-28 19:14:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:14:55,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:14:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:55,270 INFO L225 Difference]: With dead ends: 63475 [2020-10-28 19:14:55,270 INFO L226 Difference]: Without dead ends: 24825 [2020-10-28 19:14:55,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:14:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24825 states. [2020-10-28 19:14:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24825 to 24825. [2020-10-28 19:14:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24825 states. [2020-10-28 19:14:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24825 states to 24825 states and 37099 transitions. [2020-10-28 19:14:57,810 INFO L78 Accepts]: Start accepts. Automaton has 24825 states and 37099 transitions. Word has length 79 [2020-10-28 19:14:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:57,810 INFO L481 AbstractCegarLoop]: Abstraction has 24825 states and 37099 transitions. [2020-10-28 19:14:57,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 24825 states and 37099 transitions. [2020-10-28 19:14:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:14:57,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:57,827 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] [2020-10-28 19:14:57,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:14:57,827 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1274240110, now seen corresponding path program 1 times [2020-10-28 19:14:57,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:57,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139218127] [2020-10-28 19:14:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:57,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:58,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:58,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:58,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:02,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:02,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:02,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:15:02,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4634 [2020-10-28 19:15:02,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:02,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:02,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:15:02,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 19:15:02,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 19:15:02,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:02,847 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:15:02,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:02,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:02,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:02,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:02,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:02,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:02,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:02,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:02,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:02,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:02,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:02,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:02,881 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 19:15:02,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139218127] [2020-10-28 19:15:02,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:02,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:15:02,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855947360] [2020-10-28 19:15:02,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:15:02,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:02,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:15:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:15:02,883 INFO L87 Difference]: Start difference. First operand 24825 states and 37099 transitions. Second operand 4 states. [2020-10-28 19:15:04,646 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:15:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:07,069 INFO L93 Difference]: Finished difference Result 51663 states and 78175 transitions. [2020-10-28 19:15:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:07,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:15:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:07,121 INFO L225 Difference]: With dead ends: 51663 [2020-10-28 19:15:07,121 INFO L226 Difference]: Without dead ends: 32884 [2020-10-28 19:15:07,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32884 states. [2020-10-28 19:15:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32884 to 31937. [2020-10-28 19:15:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31937 states. [2020-10-28 19:15:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31937 states to 31937 states and 47699 transitions. [2020-10-28 19:15:10,349 INFO L78 Accepts]: Start accepts. Automaton has 31937 states and 47699 transitions. Word has length 79 [2020-10-28 19:15:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:10,349 INFO L481 AbstractCegarLoop]: Abstraction has 31937 states and 47699 transitions. [2020-10-28 19:15:10,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:15:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 31937 states and 47699 transitions. [2020-10-28 19:15:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:15:10,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:10,365 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] [2020-10-28 19:15:10,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:15:10,366 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1162230626, now seen corresponding path program 1 times [2020-10-28 19:15:10,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:10,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798403636] [2020-10-28 19:15:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:10,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:10,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:10,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:12,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:15,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:15,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:15,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:15:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:15:15,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:15,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:15:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 19:15:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:15,870 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:15:15,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:15,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:15,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:15,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:15,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:15,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:15:15,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:15,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:15,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:15,902 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 19:15:15,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798403636] [2020-10-28 19:15:15,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:15,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:15,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85486581] [2020-10-28 19:15:15,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:15,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:15,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:15,904 INFO L87 Difference]: Start difference. First operand 31937 states and 47699 transitions. Second operand 5 states. [2020-10-28 19:15:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:18,749 INFO L93 Difference]: Finished difference Result 52775 states and 78688 transitions. [2020-10-28 19:15:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:18,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:15:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:18,772 INFO L225 Difference]: With dead ends: 52775 [2020-10-28 19:15:18,772 INFO L226 Difference]: Without dead ends: 20992 [2020-10-28 19:15:18,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:15:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20992 states. [2020-10-28 19:15:20,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20992 to 20990. [2020-10-28 19:15:20,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20990 states. [2020-10-28 19:15:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20990 states to 20990 states and 31218 transitions. [2020-10-28 19:15:20,936 INFO L78 Accepts]: Start accepts. Automaton has 20990 states and 31218 transitions. Word has length 79 [2020-10-28 19:15:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:20,936 INFO L481 AbstractCegarLoop]: Abstraction has 20990 states and 31218 transitions. [2020-10-28 19:15:20,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 20990 states and 31218 transitions. [2020-10-28 19:15:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:15:20,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:20,945 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] [2020-10-28 19:15:20,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:15:20,945 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1620634855, now seen corresponding path program 1 times [2020-10-28 19:15:20,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:20,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960239983] [2020-10-28 19:15:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:20,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:21,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:21,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:22,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:22,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:25,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:25,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:25,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:15:25,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:15:25,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:25,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:15:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 19:15:25,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:26,342 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:15:26,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:26,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:26,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:26,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:26,376 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 19:15:26,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960239983] [2020-10-28 19:15:26,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:26,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:26,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126325884] [2020-10-28 19:15:26,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:26,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:26,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:26,378 INFO L87 Difference]: Start difference. First operand 20990 states and 31218 transitions. Second operand 5 states. [2020-10-28 19:15:26,753 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:15:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:30,276 INFO L93 Difference]: Finished difference Result 40447 states and 59851 transitions. [2020-10-28 19:15:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:15:30,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:15:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:30,305 INFO L225 Difference]: With dead ends: 40447 [2020-10-28 19:15:30,305 INFO L226 Difference]: Without dead ends: 23710 [2020-10-28 19:15:30,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:15:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23710 states. [2020-10-28 19:15:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23710 to 23703. [2020-10-28 19:15:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23703 states. [2020-10-28 19:15:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23703 states to 23703 states and 34810 transitions. [2020-10-28 19:15:32,773 INFO L78 Accepts]: Start accepts. Automaton has 23703 states and 34810 transitions. Word has length 79 [2020-10-28 19:15:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:32,773 INFO L481 AbstractCegarLoop]: Abstraction has 23703 states and 34810 transitions. [2020-10-28 19:15:32,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 23703 states and 34810 transitions. [2020-10-28 19:15:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:15:32,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:32,782 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] [2020-10-28 19:15:32,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:15:32,782 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:32,783 INFO L82 PathProgramCache]: Analyzing trace with hash 516185554, now seen corresponding path program 1 times [2020-10-28 19:15:32,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:32,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209072755] [2020-10-28 19:15:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:32,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:32,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:32,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:32,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:34,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:37,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:37,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:37,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:15:37,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:15:37,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:37,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:37,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:37,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:15:37,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 19:15:37,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:38,193 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:15:38,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:38,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:38,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:38,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:38,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:38,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:38,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:38,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:38,220 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 19:15:38,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209072755] [2020-10-28 19:15:38,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:38,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:38,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300105005] [2020-10-28 19:15:38,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:38,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:38,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:38,222 INFO L87 Difference]: Start difference. First operand 23703 states and 34810 transitions. Second operand 5 states. [2020-10-28 19:15:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:41,165 INFO L93 Difference]: Finished difference Result 43390 states and 63861 transitions. [2020-10-28 19:15:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:41,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:15:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:41,189 INFO L225 Difference]: With dead ends: 43390 [2020-10-28 19:15:41,189 INFO L226 Difference]: Without dead ends: 20019 [2020-10-28 19:15:41,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:15:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20019 states. [2020-10-28 19:15:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20019 to 20019. [2020-10-28 19:15:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20019 states. [2020-10-28 19:15:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 29454 transitions. [2020-10-28 19:15:43,155 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 29454 transitions. Word has length 79 [2020-10-28 19:15:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:43,155 INFO L481 AbstractCegarLoop]: Abstraction has 20019 states and 29454 transitions. [2020-10-28 19:15:43,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 29454 transitions. [2020-10-28 19:15:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:15:43,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:43,164 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 19:15:43,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:15:43,164 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash -109626792, now seen corresponding path program 1 times [2020-10-28 19:15:43,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:43,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344623732] [2020-10-28 19:15:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:43,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:43,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:43,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:43,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:44,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:48,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:48,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 19:15:48,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:15:48,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 19:15:48,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:48,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:48,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:15:48,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 19:15:48,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 19:15:48,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:48,542 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:15:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:48,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:48,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:48,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:48,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:48,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:48,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:48,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:48,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:48,570 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 19:15:48,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344623732] [2020-10-28 19:15:48,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:48,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:15:48,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720464096] [2020-10-28 19:15:48,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:15:48,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:48,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:15:48,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:15:48,573 INFO L87 Difference]: Start difference. First operand 20019 states and 29454 transitions. Second operand 4 states. [2020-10-28 19:15:48,935 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:15:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:52,405 INFO L93 Difference]: Finished difference Result 38837 states and 57751 transitions. [2020-10-28 19:15:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:52,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 19:15:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:52,440 INFO L225 Difference]: With dead ends: 38837 [2020-10-28 19:15:52,440 INFO L226 Difference]: Without dead ends: 26696 [2020-10-28 19:15:52,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26696 states. [2020-10-28 19:15:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26696 to 26476. [2020-10-28 19:15:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26476 states. [2020-10-28 19:15:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26476 states to 26476 states and 38955 transitions. [2020-10-28 19:15:55,112 INFO L78 Accepts]: Start accepts. Automaton has 26476 states and 38955 transitions. Word has length 82 [2020-10-28 19:15:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:55,112 INFO L481 AbstractCegarLoop]: Abstraction has 26476 states and 38955 transitions. [2020-10-28 19:15:55,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:15:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 26476 states and 38955 transitions. [2020-10-28 19:15:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:15:55,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:55,117 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 19:15:55,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:15:55,118 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:55,118 INFO L82 PathProgramCache]: Analyzing trace with hash -335709353, now seen corresponding path program 1 times [2020-10-28 19:15:55,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:55,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671307361] [2020-10-28 19:15:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:55,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:57,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:00,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:00,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 19:16:00,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:16:00,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 19:16:00,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:00,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:00,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:16:00,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:16:00,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 19:16:00,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:00,541 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:16:00,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:00,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:00,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:00,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:00,573 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 19:16:00,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671307361] [2020-10-28 19:16:00,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:00,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:00,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998741878] [2020-10-28 19:16:00,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:00,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:00,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:00,575 INFO L87 Difference]: Start difference. First operand 26476 states and 38955 transitions. Second operand 5 states. [2020-10-28 19:16:00,939 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:16:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:05,066 INFO L93 Difference]: Finished difference Result 45745 states and 67233 transitions. [2020-10-28 19:16:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:16:05,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 19:16:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:05,097 INFO L225 Difference]: With dead ends: 45745 [2020-10-28 19:16:05,097 INFO L226 Difference]: Without dead ends: 26475 [2020-10-28 19:16:05,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:16:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26475 states. [2020-10-28 19:16:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26475 to 26472. [2020-10-28 19:16:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26472 states. [2020-10-28 19:16:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26472 states to 26472 states and 38792 transitions. [2020-10-28 19:16:07,905 INFO L78 Accepts]: Start accepts. Automaton has 26472 states and 38792 transitions. Word has length 82 [2020-10-28 19:16:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:07,905 INFO L481 AbstractCegarLoop]: Abstraction has 26472 states and 38792 transitions. [2020-10-28 19:16:07,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:16:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26472 states and 38792 transitions. [2020-10-28 19:16:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:16:07,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:07,909 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 19:16:07,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:16:07,910 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash -130882412, now seen corresponding path program 1 times [2020-10-28 19:16:07,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:07,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583867206] [2020-10-28 19:16:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:07,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:07,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:07,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:08,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:08,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:08,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:10,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:10,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 19:16:10,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:10,620 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:16:10,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:10,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:10,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:10,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:10,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:16:10,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:10,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:10,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:10,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:10,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:10,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:10,647 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 19:16:10,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583867206] [2020-10-28 19:16:10,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:10,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:10,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629556943] [2020-10-28 19:16:10,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:10,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:10,649 INFO L87 Difference]: Start difference. First operand 26472 states and 38792 transitions. Second operand 4 states. [2020-10-28 19:16:12,126 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:16:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:15,652 INFO L93 Difference]: Finished difference Result 58218 states and 86490 transitions. [2020-10-28 19:16:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:15,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:16:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:15,719 INFO L225 Difference]: With dead ends: 58218 [2020-10-28 19:16:15,719 INFO L226 Difference]: Without dead ends: 36474 [2020-10-28 19:16:15,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36474 states. [2020-10-28 19:16:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36474 to 35344. [2020-10-28 19:16:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35344 states. [2020-10-28 19:16:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 51690 transitions. [2020-10-28 19:16:19,736 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 51690 transitions. Word has length 83 [2020-10-28 19:16:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:19,736 INFO L481 AbstractCegarLoop]: Abstraction has 35344 states and 51690 transitions. [2020-10-28 19:16:19,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 51690 transitions. [2020-10-28 19:16:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 19:16:19,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:19,741 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, 1] [2020-10-28 19:16:19,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:16:19,741 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash -519042821, now seen corresponding path program 1 times [2020-10-28 19:16:19,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:19,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439892963] [2020-10-28 19:16:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:20,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:21,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:21,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 19:16:21,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:16:21,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2188 [2020-10-28 19:16:21,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:21,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 19:16:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:16:21,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:22,309 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:16:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:22,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:22,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:22,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:22,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:16:22,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:22,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:22,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:22,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:22,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:22,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:22,338 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 19:16:22,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439892963] [2020-10-28 19:16:22,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:22,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:22,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194718474] [2020-10-28 19:16:22,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:22,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:22,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:22,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:22,340 INFO L87 Difference]: Start difference. First operand 35344 states and 51690 transitions. Second operand 4 states. [2020-10-28 19:16:22,713 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 19:16:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:28,239 INFO L93 Difference]: Finished difference Result 63713 states and 94419 transitions. [2020-10-28 19:16:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:28,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-28 19:16:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:28,300 INFO L225 Difference]: With dead ends: 63713 [2020-10-28 19:16:28,300 INFO L226 Difference]: Without dead ends: 40547 [2020-10-28 19:16:28,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40547 states. [2020-10-28 19:16:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40547 to 40544. [2020-10-28 19:16:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40544 states. [2020-10-28 19:16:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40544 states to 40544 states and 59734 transitions. [2020-10-28 19:16:32,837 INFO L78 Accepts]: Start accepts. Automaton has 40544 states and 59734 transitions. Word has length 85 [2020-10-28 19:16:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:32,838 INFO L481 AbstractCegarLoop]: Abstraction has 40544 states and 59734 transitions. [2020-10-28 19:16:32,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 40544 states and 59734 transitions. [2020-10-28 19:16:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:16:32,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:32,841 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, 1, 1, 1] [2020-10-28 19:16:32,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 19:16:32,841 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:32,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1781602155, now seen corresponding path program 1 times [2020-10-28 19:16:32,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:32,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579488049] [2020-10-28 19:16:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:32,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:32,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:33,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:34,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4589 [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 19:16:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 19:16:37,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:37,800 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 19:16:37,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:37,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:37,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:37,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:37,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:16:37,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:37,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:37,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:37,828 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 19:16:37,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579488049] [2020-10-28 19:16:37,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:37,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:37,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120345826] [2020-10-28 19:16:37,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:37,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:37,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:37,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:37,830 INFO L87 Difference]: Start difference. First operand 40544 states and 59734 transitions. Second operand 4 states. [2020-10-28 19:16:39,236 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:16:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:45,901 INFO L93 Difference]: Finished difference Result 95324 states and 142182 transitions. [2020-10-28 19:16:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:45,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-28 19:16:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:45,970 INFO L225 Difference]: With dead ends: 95324 [2020-10-28 19:16:45,970 INFO L226 Difference]: Without dead ends: 57939 [2020-10-28 19:16:45,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57939 states. [2020-10-28 19:16:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57939 to 55760. [2020-10-28 19:16:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55760 states. [2020-10-28 19:16:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 82573 transitions. [2020-10-28 19:16:52,655 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 82573 transitions. Word has length 87 [2020-10-28 19:16:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:52,655 INFO L481 AbstractCegarLoop]: Abstraction has 55760 states and 82573 transitions. [2020-10-28 19:16:52,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 82573 transitions. [2020-10-28 19:16:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 19:16:52,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:52,658 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, 1, 1, 1, 1, 1] [2020-10-28 19:16:52,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 19:16:52,659 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash 403041644, now seen corresponding path program 1 times [2020-10-28 19:16:52,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:52,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475487231] [2020-10-28 19:16:52,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:52,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:52,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:53,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:54,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking...