/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:03:23,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:03:23,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:03:23,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:03:23,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:03:23,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:03:23,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:03:23,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:03:23,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:03:23,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:03:23,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:03:23,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:03:23,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:03:23,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:03:23,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:03:23,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:03:23,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:03:23,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:03:23,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:03:23,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:03:23,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:03:23,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:03:23,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:03:23,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:03:23,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:03:23,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:03:23,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:03:23,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:03:23,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:03:23,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:03:23,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:03:23,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:03:23,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:03:23,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:03:23,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:03:23,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:03:23,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:03:23,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:03:23,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:03:23,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:03:23,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:03:23,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:03:23,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:03:23,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:03:23,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:03:23,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:03:23,948 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:03:23,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:03:23,949 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:03:23,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:03:23,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:03:23,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:03:23,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:03:23,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:03:23,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:03:23,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:03:23,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:03:23,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:03:23,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:03:23,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:03:23,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:03:23,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:03:23,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:03:23,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:03:23,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:03:23,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:03:23,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:03:23,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:03:23,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:03:23,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:03:23,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:03:23,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:03:24,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:03:24,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:03:24,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:03:24,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:03:24,389 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:03:24,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:03:24,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/781bd920a/7524b29a70154d5692952b727f714c58/FLAG813215f14 [2020-10-29 13:03:25,398 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:03:25,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:03:25,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/781bd920a/7524b29a70154d5692952b727f714c58/FLAG813215f14 [2020-10-29 13:03:25,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/781bd920a/7524b29a70154d5692952b727f714c58 [2020-10-29 13:03:25,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:03:25,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:03:25,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:03:25,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:03:25,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:03:25,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:03:25" (1/1) ... [2020-10-29 13:03:25,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f3b34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:25, skipping insertion in model container [2020-10-29 13:03:25,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:03:25" (1/1) ... [2020-10-29 13:03:25,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:03:25,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:03:26,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:03:26,577 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:03:27,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:03:27,029 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:03:27,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27 WrapperNode [2020-10-29 13:03:27,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:03:27,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:03:27,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:03:27,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:03:27,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... [2020-10-29 13:03:27,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... [2020-10-29 13:03:27,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... [2020-10-29 13:03:27,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... [2020-10-29 13:03:27,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... [2020-10-29 13:03:27,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... [2020-10-29 13:03:27,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... [2020-10-29 13:03:27,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:03:27,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:03:27,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:03:27,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:03:27,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:03:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:03:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:03:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:03:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:03:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:03:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:03:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:03:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:03:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:03:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:03:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:03:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:03:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:03:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:03:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:03:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:03:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:03:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:03:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:03:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:03:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:03:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:03:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:03:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:03:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:03:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:03:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:03:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:03:30,143 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:03:30,144 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:03:30,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:03:30 BoogieIcfgContainer [2020-10-29 13:03:30,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:03:30,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:03:30,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:03:30,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:03:30,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:03:25" (1/3) ... [2020-10-29 13:03:30,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba5c7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:03:30, skipping insertion in model container [2020-10-29 13:03:30,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:03:27" (2/3) ... [2020-10-29 13:03:30,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba5c7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:03:30, skipping insertion in model container [2020-10-29 13:03:30,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:03:30" (3/3) ... [2020-10-29 13:03:30,161 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 13:03:30,175 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:03:30,181 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:03:30,197 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:03:30,247 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:03:30,247 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:03:30,247 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:03:30,247 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:03:30,248 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:03:30,248 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:03:30,248 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:03:30,248 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:03:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states. [2020-10-29 13:03:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-29 13:03:30,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:03:30,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:03:30,328 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:03:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:03:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash -332104346, now seen corresponding path program 1 times [2020-10-29 13:03:30,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:03:30,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805175734] [2020-10-29 13:03:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:03:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:03:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:32,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:33,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:34,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:34,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:34,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:35,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:35,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:35,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:35,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:36,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:36,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:03:36,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-29 13:03:36,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:03:36,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-29 13:03:36,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:03:36,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:03:36,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:03:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:03:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-29 13:03:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:03:37,644 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:03:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:03:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:03:37,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:37,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:03:37,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:03:37,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:03:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:03:37,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:03:37,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:03:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:03:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:03:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:03:37,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:03:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:03:38,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805175734] [2020-10-29 13:03:38,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:03:38,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:03:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816190498] [2020-10-29 13:03:38,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:03:38,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:03:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:03:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:03:38,041 INFO L87 Difference]: Start difference. First operand 728 states. Second operand 5 states. [2020-10-29 13:03:46,469 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:03:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:03:48,276 INFO L93 Difference]: Finished difference Result 2108 states and 3753 transitions. [2020-10-29 13:03:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:03:48,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2020-10-29 13:03:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:03:48,320 INFO L225 Difference]: With dead ends: 2108 [2020-10-29 13:03:48,322 INFO L226 Difference]: Without dead ends: 1399 [2020-10-29 13:03:48,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:03:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2020-10-29 13:03:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1396. [2020-10-29 13:03:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2020-10-29 13:03:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2153 transitions. [2020-10-29 13:03:48,554 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2153 transitions. Word has length 309 [2020-10-29 13:03:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:03:48,557 INFO L481 AbstractCegarLoop]: Abstraction has 1396 states and 2153 transitions. [2020-10-29 13:03:48,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:03:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2153 transitions. [2020-10-29 13:03:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-29 13:03:48,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:03:48,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:03:48,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:03:48,576 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:03:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:03:48,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1181088620, now seen corresponding path program 1 times [2020-10-29 13:03:48,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:03:48,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288480873] [2020-10-29 13:03:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:03:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:03:48,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:49,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:49,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:50,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:50,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:50,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:50,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:50,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:51,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:51,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:53,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:03:53,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-29 13:03:53,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:03:53,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:03:53,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:03:53,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:03:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:03:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:03:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-29 13:03:53,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:03:54,591 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:03:54,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:03:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:03:54,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:54,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:03:54,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:03:54,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:03:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:03:54,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:03:54,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:03:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:03:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:03:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:03:54,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:03:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:03:54,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288480873] [2020-10-29 13:03:54,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:03:54,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:03:54,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177803998] [2020-10-29 13:03:54,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:03:54,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:03:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:03:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:03:54,937 INFO L87 Difference]: Start difference. First operand 1396 states and 2153 transitions. Second operand 5 states. [2020-10-29 13:04:02,748 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:04:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:04:04,720 INFO L93 Difference]: Finished difference Result 4047 states and 6224 transitions. [2020-10-29 13:04:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:04:04,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-29 13:04:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:04:04,738 INFO L225 Difference]: With dead ends: 4047 [2020-10-29 13:04:04,738 INFO L226 Difference]: Without dead ends: 2730 [2020-10-29 13:04:04,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:04:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2020-10-29 13:04:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2727. [2020-10-29 13:04:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2020-10-29 13:04:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 4181 transitions. [2020-10-29 13:04:04,954 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 4181 transitions. Word has length 311 [2020-10-29 13:04:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:04:04,955 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 4181 transitions. [2020-10-29 13:04:04,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:04:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 4181 transitions. [2020-10-29 13:04:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 13:04:04,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:04:04,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:04:04,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:04:04,966 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:04:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:04:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash 28021862, now seen corresponding path program 1 times [2020-10-29 13:04:04,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:04:04,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330008256] [2020-10-29 13:04:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:04:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:05,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:05,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:05,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:05,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:05,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:05,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:06,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:06,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:06,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:06,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:07,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:10,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:10,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 13:04:10,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:04:10,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:04:10,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:10,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:04:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:04:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-29 13:04:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:04:11,079 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:04:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:04:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:11,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:11,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:04:11,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:04:11,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:04:11,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:11,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:04:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:04:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:04:11,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:04:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:04:11,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330008256] [2020-10-29 13:04:11,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:04:11,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:04:11,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375455240] [2020-10-29 13:04:11,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:04:11,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:04:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:04:11,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:04:11,325 INFO L87 Difference]: Start difference. First operand 2727 states and 4181 transitions. Second operand 4 states. [2020-10-29 13:04:18,958 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-29 13:04:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:04:20,785 INFO L93 Difference]: Finished difference Result 7871 states and 12013 transitions. [2020-10-29 13:04:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:04:20,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-29 13:04:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:04:20,814 INFO L225 Difference]: With dead ends: 7871 [2020-10-29 13:04:20,814 INFO L226 Difference]: Without dead ends: 5360 [2020-10-29 13:04:20,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:04:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5360 states. [2020-10-29 13:04:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5360 to 5357. [2020-10-29 13:04:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5357 states. [2020-10-29 13:04:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 8167 transitions. [2020-10-29 13:04:21,128 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 8167 transitions. Word has length 313 [2020-10-29 13:04:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:04:21,128 INFO L481 AbstractCegarLoop]: Abstraction has 5357 states and 8167 transitions. [2020-10-29 13:04:21,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:04:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 8167 transitions. [2020-10-29 13:04:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 13:04:21,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:04:21,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:04:21,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:04:21,143 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:04:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:04:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1468527809, now seen corresponding path program 1 times [2020-10-29 13:04:21,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:04:21,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665728208] [2020-10-29 13:04:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:04:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:21,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:21,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:21,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:21,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:21,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:22,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:22,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:22,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:22,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:22,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:26,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:26,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 13:04:26,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:04:26,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-29 13:04:26,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:26,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:26,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:04:26,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:04:26,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-29 13:04:26,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:04:27,042 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:04:27,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:04:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:27,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:27,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:27,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:04:27,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:04:27,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:04:27,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:27,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:27,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:04:27,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:04:27,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:04:27,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:04:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:04:27,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665728208] [2020-10-29 13:04:27,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:04:27,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:04:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800307441] [2020-10-29 13:04:27,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:04:27,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:04:27,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:04:27,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:04:27,235 INFO L87 Difference]: Start difference. First operand 5357 states and 8167 transitions. Second operand 4 states. [2020-10-29 13:04:34,657 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-29 13:04:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:04:36,527 INFO L93 Difference]: Finished difference Result 15307 states and 23187 transitions. [2020-10-29 13:04:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:04:36,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-29 13:04:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:04:36,572 INFO L225 Difference]: With dead ends: 15307 [2020-10-29 13:04:36,573 INFO L226 Difference]: Without dead ends: 10400 [2020-10-29 13:04:36,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:04:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2020-10-29 13:04:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10397. [2020-10-29 13:04:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10397 states. [2020-10-29 13:04:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10397 states to 10397 states and 15723 transitions. [2020-10-29 13:04:37,168 INFO L78 Accepts]: Start accepts. Automaton has 10397 states and 15723 transitions. Word has length 313 [2020-10-29 13:04:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:04:37,169 INFO L481 AbstractCegarLoop]: Abstraction has 10397 states and 15723 transitions. [2020-10-29 13:04:37,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:04:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 10397 states and 15723 transitions. [2020-10-29 13:04:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 13:04:37,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:04:37,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:04:37,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:04:37,198 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:04:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:04:37,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1185613092, now seen corresponding path program 1 times [2020-10-29 13:04:37,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:04:37,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099677368] [2020-10-29 13:04:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:04:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:37,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:37,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:37,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:37,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:37,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:38,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:38,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:38,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:38,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:38,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:42,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:42,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 13:04:42,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:04:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 13:04:42,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:42,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:04:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:04:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-29 13:04:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:04:43,069 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:04:43,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:04:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:43,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:43,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:43,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:04:43,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:04:43,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:04:43,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:43,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:04:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:04:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:04:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:04:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:04:43,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099677368] [2020-10-29 13:04:43,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:04:43,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:04:43,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127499690] [2020-10-29 13:04:43,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:04:43,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:04:43,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:04:43,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:04:43,251 INFO L87 Difference]: Start difference. First operand 10397 states and 15723 transitions. Second operand 5 states. [2020-10-29 13:04:50,111 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:04:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:04:52,000 INFO L93 Difference]: Finished difference Result 30461 states and 45911 transitions. [2020-10-29 13:04:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:04:52,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-10-29 13:04:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:04:52,062 INFO L225 Difference]: With dead ends: 30461 [2020-10-29 13:04:52,062 INFO L226 Difference]: Without dead ends: 20314 [2020-10-29 13:04:52,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:04:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20314 states. [2020-10-29 13:04:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20314 to 20311. [2020-10-29 13:04:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20311 states. [2020-10-29 13:04:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20311 states to 20311 states and 30411 transitions. [2020-10-29 13:04:53,307 INFO L78 Accepts]: Start accepts. Automaton has 20311 states and 30411 transitions. Word has length 313 [2020-10-29 13:04:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:04:53,308 INFO L481 AbstractCegarLoop]: Abstraction has 20311 states and 30411 transitions. [2020-10-29 13:04:53,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:04:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 20311 states and 30411 transitions. [2020-10-29 13:04:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-29 13:04:53,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:04:53,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:04:53,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:04:53,356 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:04:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:04:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1812724206, now seen corresponding path program 1 times [2020-10-29 13:04:53,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:04:53,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508184194] [2020-10-29 13:04:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:04:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:53,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:53,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:53,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:53,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:54,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:54,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:54,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:54,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:54,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:56,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:58,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:58,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-29 13:04:58,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:04:58,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-29 13:04:58,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:58,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:04:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 13:04:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-29 13:04:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:04:59,228 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:04:59,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:04:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:04:59,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:04:59,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:04:59,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:04:59,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:04:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:04:59,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:04:59,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:04:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:04:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:04:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:04:59,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:04:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:04:59,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508184194] [2020-10-29 13:04:59,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:04:59,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:04:59,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185465216] [2020-10-29 13:04:59,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:04:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:04:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:04:59,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:04:59,378 INFO L87 Difference]: Start difference. First operand 20311 states and 30411 transitions. Second operand 4 states. [2020-10-29 13:05:07,810 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-29 13:05:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:09,962 INFO L93 Difference]: Finished difference Result 58317 states and 86855 transitions. [2020-10-29 13:05:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:05:09,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-29 13:05:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:10,028 INFO L225 Difference]: With dead ends: 58317 [2020-10-29 13:05:10,028 INFO L226 Difference]: Without dead ends: 39450 [2020-10-29 13:05:10,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:05:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39450 states. [2020-10-29 13:05:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39450 to 39447. [2020-10-29 13:05:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39447 states. [2020-10-29 13:05:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39447 states to 39447 states and 58559 transitions. [2020-10-29 13:05:11,816 INFO L78 Accepts]: Start accepts. Automaton has 39447 states and 58559 transitions. Word has length 315 [2020-10-29 13:05:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:05:11,817 INFO L481 AbstractCegarLoop]: Abstraction has 39447 states and 58559 transitions. [2020-10-29 13:05:11,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:05:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 39447 states and 58559 transitions. [2020-10-29 13:05:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-29 13:05:11,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:11,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:05:11,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:05:11,891 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1501711113, now seen corresponding path program 1 times [2020-10-29 13:05:11,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:11,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141948938] [2020-10-29 13:05:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:11,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:11,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:13,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:14,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:16,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:16,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-29 13:05:16,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:05:16,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:05:16,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:16,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:05:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:05:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-29 13:05:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:05:17,744 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:05:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:05:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:17,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:17,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:17,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:05:17,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:05:17,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:05:17,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:17,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:05:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:05:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:05:17,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:05:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:05:17,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141948938] [2020-10-29 13:05:17,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:05:17,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:05:17,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29294085] [2020-10-29 13:05:17,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:05:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:05:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:05:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:05:17,893 INFO L87 Difference]: Start difference. First operand 39447 states and 58559 transitions. Second operand 5 states. [2020-10-29 13:05:26,553 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:05:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:28,998 INFO L93 Difference]: Finished difference Result 115635 states and 171179 transitions. [2020-10-29 13:05:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:05:28,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-29 13:05:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:29,121 INFO L225 Difference]: With dead ends: 115635 [2020-10-29 13:05:29,122 INFO L226 Difference]: Without dead ends: 77152 [2020-10-29 13:05:29,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:05:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77152 states. [2020-10-29 13:05:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77152 to 77149. [2020-10-29 13:05:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77149 states. [2020-10-29 13:05:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77149 states to 77149 states and 113439 transitions. [2020-10-29 13:05:33,104 INFO L78 Accepts]: Start accepts. Automaton has 77149 states and 113439 transitions. Word has length 315 [2020-10-29 13:05:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:05:33,104 INFO L481 AbstractCegarLoop]: Abstraction has 77149 states and 113439 transitions. [2020-10-29 13:05:33,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:05:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 77149 states and 113439 transitions. [2020-10-29 13:05:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 13:05:33,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:33,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:05:33,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:05:33,193 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1886116063, now seen corresponding path program 1 times [2020-10-29 13:05:33,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:33,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636410651] [2020-10-29 13:05:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:33,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:34,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:35,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:38,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:38,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-29 13:05:38,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:05:38,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:05:38,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:38,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:05:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:05:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-29 13:05:38,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:05:39,096 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:05:39,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:05:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:39,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:39,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:39,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:05:39,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:05:39,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:05:39,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:39,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:05:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:05:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:05:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:05:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:05:39,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636410651] [2020-10-29 13:05:39,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:05:39,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:05:39,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945816255] [2020-10-29 13:05:39,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:05:39,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:05:39,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:05:39,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:05:39,284 INFO L87 Difference]: Start difference. First operand 77149 states and 113439 transitions. Second operand 5 states. [2020-10-29 13:05:48,998 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:05:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:51,697 INFO L93 Difference]: Finished difference Result 163895 states and 240687 transitions. [2020-10-29 13:05:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:05:51,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-29 13:05:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:51,834 INFO L225 Difference]: With dead ends: 163895 [2020-10-29 13:05:51,834 INFO L226 Difference]: Without dead ends: 88016 [2020-10-29 13:05:51,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:05:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88016 states. [2020-10-29 13:05:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88016 to 76869. [2020-10-29 13:05:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76869 states. [2020-10-29 13:05:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76869 states to 76869 states and 112795 transitions. [2020-10-29 13:05:56,286 INFO L78 Accepts]: Start accepts. Automaton has 76869 states and 112795 transitions. Word has length 317 [2020-10-29 13:05:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:05:56,287 INFO L481 AbstractCegarLoop]: Abstraction has 76869 states and 112795 transitions. [2020-10-29 13:05:56,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:05:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 76869 states and 112795 transitions. [2020-10-29 13:05:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-29 13:05:56,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:56,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:05:56,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:05:56,390 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1831724393, now seen corresponding path program 1 times [2020-10-29 13:05:56,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:56,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081952179] [2020-10-29 13:05:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:57,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:01,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-29 13:06:01,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:06:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:06:01,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:01,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:06:01,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:06:01,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:02,324 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:06:02,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:02,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:02,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:02,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:02,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:02,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:06:02,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:02,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:02,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:02,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:02,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:02,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:02,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081952179] [2020-10-29 13:06:02,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:02,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:02,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100174613] [2020-10-29 13:06:02,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:02,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:02,470 INFO L87 Difference]: Start difference. First operand 76869 states and 112795 transitions. Second operand 5 states. [2020-10-29 13:06:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:19,067 INFO L93 Difference]: Finished difference Result 225295 states and 329748 transitions. [2020-10-29 13:06:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:06:19,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-29 13:06:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:19,357 INFO L225 Difference]: With dead ends: 225295 [2020-10-29 13:06:19,357 INFO L226 Difference]: Without dead ends: 152996 [2020-10-29 13:06:19,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:06:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152996 states. [2020-10-29 13:06:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152996 to 81955. [2020-10-29 13:06:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81955 states. [2020-10-29 13:06:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81955 states to 81955 states and 120765 transitions. [2020-10-29 13:06:24,970 INFO L78 Accepts]: Start accepts. Automaton has 81955 states and 120765 transitions. Word has length 319 [2020-10-29 13:06:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:24,970 INFO L481 AbstractCegarLoop]: Abstraction has 81955 states and 120765 transitions. [2020-10-29 13:06:24,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 81955 states and 120765 transitions. [2020-10-29 13:06:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-29 13:06:25,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:25,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:06:25,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:06:25,046 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash 614511817, now seen corresponding path program 1 times [2020-10-29 13:06:25,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:25,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247446103] [2020-10-29 13:06:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:25,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:26,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:30,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:30,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-29 13:06:30,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:30,871 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-29 13:06:30,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:30,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:30,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:30,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:30,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:30,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:06:30,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:30,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:30,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:30,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:30,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:30,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:31,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247446103] [2020-10-29 13:06:31,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:31,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:06:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395859731] [2020-10-29 13:06:31,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:06:31,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:06:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:06:31,026 INFO L87 Difference]: Start difference. First operand 81955 states and 120765 transitions. Second operand 4 states. [2020-10-29 13:06:45,536 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-29 13:06:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:49,395 INFO L93 Difference]: Finished difference Result 229498 states and 335955 transitions. [2020-10-29 13:06:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:06:49,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-10-29 13:06:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:49,596 INFO L225 Difference]: With dead ends: 229498 [2020-10-29 13:06:49,596 INFO L226 Difference]: Without dead ends: 156073 [2020-10-29 13:06:49,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156073 states. [2020-10-29 13:06:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156073 to 156070. [2020-10-29 13:06:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156070 states. [2020-10-29 13:06:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156070 states to 156070 states and 227481 transitions. [2020-10-29 13:06:59,656 INFO L78 Accepts]: Start accepts. Automaton has 156070 states and 227481 transitions. Word has length 320 [2020-10-29 13:06:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:59,656 INFO L481 AbstractCegarLoop]: Abstraction has 156070 states and 227481 transitions. [2020-10-29 13:06:59,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:06:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 156070 states and 227481 transitions. [2020-10-29 13:06:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-29 13:06:59,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:59,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:06:59,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:06:59,791 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888610, now seen corresponding path program 1 times [2020-10-29 13:06:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:59,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247209367] [2020-10-29 13:06:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:00,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking...