/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:15:37,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:15:37,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:15:37,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:15:37,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:15:37,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:15:37,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:15:37,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:15:37,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:15:37,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:15:37,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:15:37,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:15:37,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:15:37,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:15:37,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:15:37,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:15:37,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:15:37,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:15:37,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:15:37,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:15:37,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:15:37,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:15:37,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:15:37,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:15:37,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:15:37,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:15:37,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:15:37,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:15:37,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:15:37,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:15:37,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:15:37,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:15:37,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:15:37,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:15:37,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:15:37,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:15:37,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:15:37,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:15:37,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:15:37,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:15:37,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:15:37,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:15:38,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:15:38,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:15:38,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:15:38,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:15:38,031 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:15:38,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:15:38,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:15:38,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:15:38,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:15:38,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:15:38,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:15:38,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:15:38,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:15:38,034 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:15:38,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:15:38,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:15:38,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:15:38,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:15:38,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:15:38,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:15:38,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:15:38,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:15:38,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:15:38,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:15:38,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:15:38,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:15:38,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:15:38,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:15:38,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:15:38,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:15:38,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:15:38,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:15:38,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:15:38,489 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:15:38,490 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:15:38,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 18:15:38,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/796aed3c8/875eb2614371490cb961338bdbb16511/FLAGf53e65198 [2020-10-28 18:15:39,269 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:15:39,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 18:15:39,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/796aed3c8/875eb2614371490cb961338bdbb16511/FLAGf53e65198 [2020-10-28 18:15:39,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/796aed3c8/875eb2614371490cb961338bdbb16511 [2020-10-28 18:15:39,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:15:39,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:15:39,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:39,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:15:39,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:15:39,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:39,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4a2634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:39, skipping insertion in model container [2020-10-28 18:15:39,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:39" (1/1) ... [2020-10-28 18:15:39,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:15:39,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:15:40,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:40,042 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:15:40,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:40,246 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:15:40,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40 WrapperNode [2020-10-28 18:15:40,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:40,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:15:40,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:15:40,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:15:40,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... [2020-10-28 18:15:40,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... [2020-10-28 18:15:40,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... [2020-10-28 18:15:40,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... [2020-10-28 18:15:40,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... [2020-10-28 18:15:40,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... [2020-10-28 18:15:40,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... [2020-10-28 18:15:40,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:15:40,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:15:40,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:15:40,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:15:40,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:15:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:15:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:15:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:15:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:15:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:15:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:15:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:15:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:15:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:15:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:15:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:15:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:15:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:15:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:15:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:15:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:15:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:15:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:15:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:15:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:15:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:15:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:15:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:15:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:15:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:15:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:15:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:15:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:15:41,905 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:15:41,906 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:15:41,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:41 BoogieIcfgContainer [2020-10-28 18:15:41,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:15:41,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:15:41,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:15:41,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:15:41,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:15:39" (1/3) ... [2020-10-28 18:15:41,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aed8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:41, skipping insertion in model container [2020-10-28 18:15:41,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:40" (2/3) ... [2020-10-28 18:15:41,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aed8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:41, skipping insertion in model container [2020-10-28 18:15:41,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:41" (3/3) ... [2020-10-28 18:15:41,939 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 18:15:41,952 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:15:41,957 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:15:41,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:15:42,004 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:15:42,004 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:15:42,004 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:15:42,004 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:15:42,005 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:15:42,005 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:15:42,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:15:42,005 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:15:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states. [2020-10-28 18:15:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 18:15:42,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:42,053 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] [2020-10-28 18:15:42,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:42,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1566272280, now seen corresponding path program 1 times [2020-10-28 18:15:42,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:42,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538039812] [2020-10-28 18:15:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:43,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:43,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:44,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:45,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:47,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:47,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 18:15:47,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:15:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-28 18:15:47,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:47,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:15:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 18:15:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:15:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 18:15:48,456 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:15:48,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:48,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:48,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:48,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:48,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:48,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:15:48,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:48,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:48,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:48,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:48,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:48,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:15:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:48,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538039812] [2020-10-28 18:15:48,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:48,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:15:48,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147118762] [2020-10-28 18:15:48,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:15:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:15:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:15:48,605 INFO L87 Difference]: Start difference. First operand 328 states. Second operand 4 states. [2020-10-28 18:15:49,359 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-28 18:15:51,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:51,735 INFO L93 Difference]: Finished difference Result 583 states and 1010 transitions. [2020-10-28 18:15:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:15:51,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-28 18:15:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:51,754 INFO L225 Difference]: With dead ends: 583 [2020-10-28 18:15:51,755 INFO L226 Difference]: Without dead ends: 440 [2020-10-28 18:15:51,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-28 18:15:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 437. [2020-10-28 18:15:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-28 18:15:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 727 transitions. [2020-10-28 18:15:51,909 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 727 transitions. Word has length 116 [2020-10-28 18:15:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:51,911 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 727 transitions. [2020-10-28 18:15:51,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:15:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 727 transitions. [2020-10-28 18:15:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 18:15:51,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:51,924 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] [2020-10-28 18:15:51,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:15:51,924 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2097749728, now seen corresponding path program 1 times [2020-10-28 18:15:51,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:51,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816600104] [2020-10-28 18:15:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:52,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:52,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:52,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:53,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:53,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:54,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:57,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:57,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 18:15:57,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:15:57,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 18:15:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:57,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:57,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:15:57,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:15:57,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:15:57,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 18:15:57,995 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:15:57,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:58,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:58,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:58,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:58,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:58,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:15:58,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:58,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:58,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:58,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:58,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:58,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:58,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816600104] [2020-10-28 18:15:58,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:58,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:58,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817831035] [2020-10-28 18:15:58,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:15:58,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:15:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:58,147 INFO L87 Difference]: Start difference. First operand 437 states and 727 transitions. Second operand 5 states. [2020-10-28 18:16:01,519 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:16:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:01,643 INFO L93 Difference]: Finished difference Result 1247 states and 2074 transitions. [2020-10-28 18:16:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:01,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-28 18:16:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:01,656 INFO L225 Difference]: With dead ends: 1247 [2020-10-28 18:16:01,656 INFO L226 Difference]: Without dead ends: 845 [2020-10-28 18:16:01,664 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 [2020-10-28 18:16:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-10-28 18:16:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 842. [2020-10-28 18:16:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-10-28 18:16:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1398 transitions. [2020-10-28 18:16:01,765 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1398 transitions. Word has length 119 [2020-10-28 18:16:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:01,767 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1398 transitions. [2020-10-28 18:16:01,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1398 transitions. [2020-10-28 18:16:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 18:16:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:01,772 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] [2020-10-28 18:16:01,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:16:01,772 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1975387022, now seen corresponding path program 1 times [2020-10-28 18:16:01,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:01,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070906709] [2020-10-28 18:16:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:01,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:01,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:02,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:02,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:02,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:05,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:06,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 18:16:06,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:16:06,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:16:06,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:06,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:06,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:06,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:06,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:16:06,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:07,618 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:16:07,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:07,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:07,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:07,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:07,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:07,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:16:07,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:07,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:07,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:07,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070906709] [2020-10-28 18:16:07,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:07,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:07,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665425648] [2020-10-28 18:16:07,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:07,715 INFO L87 Difference]: Start difference. First operand 842 states and 1398 transitions. Second operand 5 states. [2020-10-28 18:16:10,660 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:16:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:10,799 INFO L93 Difference]: Finished difference Result 2402 states and 3979 transitions. [2020-10-28 18:16:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:10,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-28 18:16:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:10,810 INFO L225 Difference]: With dead ends: 2402 [2020-10-28 18:16:10,811 INFO L226 Difference]: Without dead ends: 1625 [2020-10-28 18:16:10,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2020-10-28 18:16:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1622. [2020-10-28 18:16:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2020-10-28 18:16:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2675 transitions. [2020-10-28 18:16:10,953 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2675 transitions. Word has length 119 [2020-10-28 18:16:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:10,953 INFO L481 AbstractCegarLoop]: Abstraction has 1622 states and 2675 transitions. [2020-10-28 18:16:10,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2675 transitions. [2020-10-28 18:16:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 18:16:10,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:10,958 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] [2020-10-28 18:16:10,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:16:10,959 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash -494074190, now seen corresponding path program 1 times [2020-10-28 18:16:10,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:10,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886850910] [2020-10-28 18:16:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:11,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:16,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 18:16:16,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:16:16,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 18:16:16,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:16,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:16:16,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:16,922 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:16:16,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:16,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:16,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:16,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:16,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:16:16,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:16,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:17,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886850910] [2020-10-28 18:16:17,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:17,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:17,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160093437] [2020-10-28 18:16:17,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:17,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:17,032 INFO L87 Difference]: Start difference. First operand 1622 states and 2675 transitions. Second operand 5 states. [2020-10-28 18:16:20,369 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:16:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:20,564 INFO L93 Difference]: Finished difference Result 4556 states and 7490 transitions. [2020-10-28 18:16:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:20,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-28 18:16:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:20,584 INFO L225 Difference]: With dead ends: 4556 [2020-10-28 18:16:20,584 INFO L226 Difference]: Without dead ends: 3161 [2020-10-28 18:16:20,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2020-10-28 18:16:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3158. [2020-10-28 18:16:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3158 states. [2020-10-28 18:16:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 5189 transitions. [2020-10-28 18:16:20,883 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 5189 transitions. Word has length 120 [2020-10-28 18:16:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:20,883 INFO L481 AbstractCegarLoop]: Abstraction has 3158 states and 5189 transitions. [2020-10-28 18:16:20,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 5189 transitions. [2020-10-28 18:16:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 18:16:20,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:20,890 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] [2020-10-28 18:16:20,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:16:20,891 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:20,891 INFO L82 PathProgramCache]: Analyzing trace with hash 496412900, now seen corresponding path program 1 times [2020-10-28 18:16:20,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:20,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445119363] [2020-10-28 18:16:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:20,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:21,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:21,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:25,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:25,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:25,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 18:16:25,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:16:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 18:16:25,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:25,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 18:16:25,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:16:26,709 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:16:26,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:26,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:26,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:26,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:26,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:26,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:16:26,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:26,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:26,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:26,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:26,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445119363] [2020-10-28 18:16:26,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:26,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:26,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380929664] [2020-10-28 18:16:26,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:26,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:26,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:26,874 INFO L87 Difference]: Start difference. First operand 3158 states and 5189 transitions. Second operand 5 states. [2020-10-28 18:16:30,128 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:16:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:30,371 INFO L93 Difference]: Finished difference Result 9154 states and 15022 transitions. [2020-10-28 18:16:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:30,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-28 18:16:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:30,405 INFO L225 Difference]: With dead ends: 9154 [2020-10-28 18:16:30,405 INFO L226 Difference]: Without dead ends: 6135 [2020-10-28 18:16:30,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6135 states. [2020-10-28 18:16:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6135 to 6132. [2020-10-28 18:16:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6132 states. [2020-10-28 18:16:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 10024 transitions. [2020-10-28 18:16:30,987 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 10024 transitions. Word has length 121 [2020-10-28 18:16:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:30,988 INFO L481 AbstractCegarLoop]: Abstraction has 6132 states and 10024 transitions. [2020-10-28 18:16:30,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 10024 transitions. [2020-10-28 18:16:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 18:16:31,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:31,000 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] [2020-10-28 18:16:31,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:16:31,001 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:31,002 INFO L82 PathProgramCache]: Analyzing trace with hash -462609259, now seen corresponding path program 1 times [2020-10-28 18:16:31,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:31,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050491662] [2020-10-28 18:16:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:31,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:31,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:31,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:31,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:32,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:36,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:36,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 18:16:36,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:16:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 18:16:36,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:36,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:36,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:36,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:36,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 18:16:36,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:36,735 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:16:36,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:36,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:36,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:36,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:36,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:16:36,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:36,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050491662] [2020-10-28 18:16:36,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:36,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:36,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066011298] [2020-10-28 18:16:36,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:36,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:36,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:36,826 INFO L87 Difference]: Start difference. First operand 6132 states and 10024 transitions. Second operand 5 states. [2020-10-28 18:16:40,382 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:16:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:40,737 INFO L93 Difference]: Finished difference Result 17464 states and 28462 transitions. [2020-10-28 18:16:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:40,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-28 18:16:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:40,792 INFO L225 Difference]: With dead ends: 17464 [2020-10-28 18:16:40,792 INFO L226 Difference]: Without dead ends: 11828 [2020-10-28 18:16:40,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11828 states. [2020-10-28 18:16:41,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11828 to 11825. [2020-10-28 18:16:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11825 states. [2020-10-28 18:16:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11825 states to 11825 states and 19145 transitions. [2020-10-28 18:16:41,768 INFO L78 Accepts]: Start accepts. Automaton has 11825 states and 19145 transitions. Word has length 121 [2020-10-28 18:16:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:41,769 INFO L481 AbstractCegarLoop]: Abstraction has 11825 states and 19145 transitions. [2020-10-28 18:16:41,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 11825 states and 19145 transitions. [2020-10-28 18:16:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 18:16:41,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:41,795 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] [2020-10-28 18:16:41,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:16:41,795 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:41,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1188955356, now seen corresponding path program 1 times [2020-10-28 18:16:41,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:41,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075320743] [2020-10-28 18:16:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:42,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:42,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:42,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:42,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:46,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:46,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:46,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:46,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 18:16:46,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:16:46,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 18:16:46,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:46,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:46,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:16:46,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 18:16:46,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:16:46,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:47,575 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:16:47,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:47,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:47,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:47,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:47,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:16:47,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:47,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:47,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:47,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075320743] [2020-10-28 18:16:47,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:47,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:16:47,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816431546] [2020-10-28 18:16:47,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:16:47,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:47,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:16:47,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:16:47,641 INFO L87 Difference]: Start difference. First operand 11825 states and 19145 transitions. Second operand 4 states. [2020-10-28 18:16:48,254 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-28 18:16:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:51,418 INFO L93 Difference]: Finished difference Result 25207 states and 41613 transitions. [2020-10-28 18:16:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:16:51,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2020-10-28 18:16:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:51,490 INFO L225 Difference]: With dead ends: 25207 [2020-10-28 18:16:51,490 INFO L226 Difference]: Without dead ends: 18244 [2020-10-28 18:16:51,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18244 states. [2020-10-28 18:16:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18244 to 18241. [2020-10-28 18:16:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18241 states. [2020-10-28 18:16:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18241 states to 18241 states and 29817 transitions. [2020-10-28 18:16:53,173 INFO L78 Accepts]: Start accepts. Automaton has 18241 states and 29817 transitions. Word has length 122 [2020-10-28 18:16:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:53,174 INFO L481 AbstractCegarLoop]: Abstraction has 18241 states and 29817 transitions. [2020-10-28 18:16:53,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:16:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 18241 states and 29817 transitions. [2020-10-28 18:16:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 18:16:53,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:53,201 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] [2020-10-28 18:16:53,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:16:53,201 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash -168441052, now seen corresponding path program 1 times [2020-10-28 18:16:53,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:53,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855516812] [2020-10-28 18:16:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:53,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:53,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:53,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:54,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:54,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:54,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:58,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:58,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 18:16:58,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:16:58,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:16:58,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:58,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:16:58,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:59,046 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:16:59,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:59,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:59,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:59,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:59,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:16:59,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:59,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:59,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:59,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855516812] [2020-10-28 18:16:59,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:59,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:59,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262904604] [2020-10-28 18:16:59,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:59,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:59,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:59,141 INFO L87 Difference]: Start difference. First operand 18241 states and 29817 transitions. Second operand 5 states. [2020-10-28 18:17:02,880 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:17:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:04,318 INFO L93 Difference]: Finished difference Result 53828 states and 87988 transitions. [2020-10-28 18:17:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:04,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-28 18:17:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:04,408 INFO L225 Difference]: With dead ends: 53828 [2020-10-28 18:17:04,409 INFO L226 Difference]: Without dead ends: 35731 [2020-10-28 18:17:04,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35731 states. [2020-10-28 18:17:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35731 to 35728. [2020-10-28 18:17:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35728 states. [2020-10-28 18:17:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35728 states to 35728 states and 58099 transitions. [2020-10-28 18:17:07,393 INFO L78 Accepts]: Start accepts. Automaton has 35728 states and 58099 transitions. Word has length 126 [2020-10-28 18:17:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:07,393 INFO L481 AbstractCegarLoop]: Abstraction has 35728 states and 58099 transitions. [2020-10-28 18:17:07,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 35728 states and 58099 transitions. [2020-10-28 18:17:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 18:17:07,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:07,429 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] [2020-10-28 18:17:07,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:17:07,429 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2043028054, now seen corresponding path program 1 times [2020-10-28 18:17:07,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:07,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381964021] [2020-10-28 18:17:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:07,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:12,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 18:17:12,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:17:12,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:17:12,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:12,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:17:12,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:13,144 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:17:13,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:13,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:13,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:13,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:13,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:13,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:17:13,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:13,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:13,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:13,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:13,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:13,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:13,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381964021] [2020-10-28 18:17:13,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:13,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:13,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841478772] [2020-10-28 18:17:13,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:13,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:13,218 INFO L87 Difference]: Start difference. First operand 35728 states and 58099 transitions. Second operand 5 states. [2020-10-28 18:17:18,122 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:17:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:21,231 INFO L93 Difference]: Finished difference Result 104526 states and 169960 transitions. [2020-10-28 18:17:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:21,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-28 18:17:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:21,400 INFO L225 Difference]: With dead ends: 104526 [2020-10-28 18:17:21,400 INFO L226 Difference]: Without dead ends: 69625 [2020-10-28 18:17:21,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:21,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69625 states. [2020-10-28 18:17:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69625 to 69622. [2020-10-28 18:17:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69622 states. [2020-10-28 18:17:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69622 states to 69622 states and 112476 transitions. [2020-10-28 18:17:27,514 INFO L78 Accepts]: Start accepts. Automaton has 69622 states and 112476 transitions. Word has length 126 [2020-10-28 18:17:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:27,514 INFO L481 AbstractCegarLoop]: Abstraction has 69622 states and 112476 transitions. [2020-10-28 18:17:27,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 69622 states and 112476 transitions. [2020-10-28 18:17:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 18:17:27,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:27,761 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] [2020-10-28 18:17:27,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:17:27,761 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:27,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1624588105, now seen corresponding path program 1 times [2020-10-28 18:17:27,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:27,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573088773] [2020-10-28 18:17:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:27,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:32,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 18:17:32,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:17:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 18:17:32,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:32,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:32,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 18:17:32,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:33,522 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:17:33,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:33,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:33,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:33,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:33,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:17:33,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:33,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:33,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573088773] [2020-10-28 18:17:33,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:33,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104494628] [2020-10-28 18:17:33,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:33,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:33,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:33,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:33,584 INFO L87 Difference]: Start difference. First operand 69622 states and 112476 transitions. Second operand 5 states. [2020-10-28 18:17:40,232 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-28 18:17:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:47,351 INFO L93 Difference]: Finished difference Result 205550 states and 332236 transitions. [2020-10-28 18:17:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:47,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-28 18:17:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:47,638 INFO L225 Difference]: With dead ends: 205550 [2020-10-28 18:17:47,639 INFO L226 Difference]: Without dead ends: 135947 [2020-10-28 18:17:47,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135947 states. [2020-10-28 18:17:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135947 to 135944. [2020-10-28 18:17:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135944 states. [2020-10-28 18:17:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135944 states to 135944 states and 218600 transitions. [2020-10-28 18:17:59,715 INFO L78 Accepts]: Start accepts. Automaton has 135944 states and 218600 transitions. Word has length 127 [2020-10-28 18:17:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:59,716 INFO L481 AbstractCegarLoop]: Abstraction has 135944 states and 218600 transitions. [2020-10-28 18:17:59,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 135944 states and 218600 transitions. [2020-10-28 18:18:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 18:18:00,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:00,109 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] [2020-10-28 18:18:00,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:18:00,110 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1592496355, now seen corresponding path program 1 times [2020-10-28 18:18:00,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:00,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108449787] [2020-10-28 18:18:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:00,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:00,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:00,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:05,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:05,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 18:18:05,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:18:05,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:18:05,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:05,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:18:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 18:18:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:18:05,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:05,813 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:18:05,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:05,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:05,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:05,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:05,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:05,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:18:05,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:05,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:05,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108449787] [2020-10-28 18:18:05,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:05,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:18:05,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865088981] [2020-10-28 18:18:05,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:18:05,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:05,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:18:05,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:18:05,864 INFO L87 Difference]: Start difference. First operand 135944 states and 218600 transitions. Second operand 4 states. [2020-10-28 18:18:06,527 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-28 18:18:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:28,550 INFO L93 Difference]: Finished difference Result 327438 states and 535020 transitions. [2020-10-28 18:18:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:18:28,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 18:18:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:29,229 INFO L225 Difference]: With dead ends: 327438 [2020-10-28 18:18:29,230 INFO L226 Difference]: Without dead ends: 227595 [2020-10-28 18:18:29,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227595 states. [2020-10-28 18:18:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227595 to 227592. [2020-10-28 18:18:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227592 states. [2020-10-28 18:18:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227592 states to 227592 states and 368616 transitions. [2020-10-28 18:18:50,074 INFO L78 Accepts]: Start accepts. Automaton has 227592 states and 368616 transitions. Word has length 128 [2020-10-28 18:18:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:50,075 INFO L481 AbstractCegarLoop]: Abstraction has 227592 states and 368616 transitions. [2020-10-28 18:18:50,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:18:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 227592 states and 368616 transitions. [2020-10-28 18:18:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 18:18:50,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:50,170 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] [2020-10-28 18:18:50,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:18:50,171 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:50,171 INFO L82 PathProgramCache]: Analyzing trace with hash 474666546, now seen corresponding path program 1 times [2020-10-28 18:18:50,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:50,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894332298] [2020-10-28 18:18:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:50,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:50,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:51,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:55,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:18:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:55,913 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-28 18:18:55,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:55,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:55,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:55,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:55,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:55,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:18:55,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:55,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:55,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:55,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:55,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:55,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:55,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894332298] [2020-10-28 18:18:55,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:55,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:55,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359950848] [2020-10-28 18:18:55,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:55,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:55,994 INFO L87 Difference]: Start difference. First operand 227592 states and 368616 transitions. Second operand 5 states. [2020-10-28 18:19:09,159 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 286