/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:13:42,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:13:42,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:13:42,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:13:42,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:13:42,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:13:42,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:13:42,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:13:42,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:13:42,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:13:42,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:13:42,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:13:42,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:13:42,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:13:42,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:13:42,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:13:42,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:13:42,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:13:42,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:13:42,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:13:42,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:13:42,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:13:42,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:13:42,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:13:42,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:13:42,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:13:42,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:13:42,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:13:42,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:13:42,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:13:42,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:13:42,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:13:42,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:13:42,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:13:42,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:13:42,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:13:42,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:13:42,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:13:42,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:13:42,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:13:42,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:13:42,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:13:42,922 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:13:42,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:13:42,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:13:42,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:13:42,927 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:13:42,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:13:42,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:13:42,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:13:42,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:13:42,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:13:42,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:13:42,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:13:42,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:13:42,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:13:42,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:13:42,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:13:42,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:13:42,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:13:42,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:13:42,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:13:42,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:13:42,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:13:42,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:13:42,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:13:42,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:13:42,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:13:42,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:13:42,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:13:42,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:13:42,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:13:43,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:13:43,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:13:43,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:13:43,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:13:43,353 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:13:43,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:13:43,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f98c0accb/2b2795849006457bae0430628c5f68e8/FLAG8e4fafef2 [2020-10-29 13:13:44,052 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:13:44,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:13:44,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f98c0accb/2b2795849006457bae0430628c5f68e8/FLAG8e4fafef2 [2020-10-29 13:13:44,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f98c0accb/2b2795849006457bae0430628c5f68e8 [2020-10-29 13:13:44,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:13:44,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:13:44,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:13:44,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:13:44,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:13:44,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5677bf1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44, skipping insertion in model container [2020-10-29 13:13:44,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:13:44,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:13:44,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:13:44,642 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:13:44,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:13:44,727 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:13:44,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44 WrapperNode [2020-10-29 13:13:44,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:13:44,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:13:44,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:13:44,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:13:44,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... [2020-10-29 13:13:44,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:13:44,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:13:44,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:13:44,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:13:44,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:13:44,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:13:44,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:13:44,872 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:13:44,872 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:13:44,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:13:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:13:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:13:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:13:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:13:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:13:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:13:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:13:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:13:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:13:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:13:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:13:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:13:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:13:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:13:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:13:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:13:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:13:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:13:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:13:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:13:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:13:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:13:45,417 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:13:45,417 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:13:45,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:13:45 BoogieIcfgContainer [2020-10-29 13:13:45,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:13:45,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:13:45,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:13:45,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:13:45,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:13:44" (1/3) ... [2020-10-29 13:13:45,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db886c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:13:45, skipping insertion in model container [2020-10-29 13:13:45,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:44" (2/3) ... [2020-10-29 13:13:45,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db886c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:13:45, skipping insertion in model container [2020-10-29 13:13:45,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:13:45" (3/3) ... [2020-10-29 13:13:45,432 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:13:45,478 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:13:45,493 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:13:45,534 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:13:45,563 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:13:45,563 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:13:45,564 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:13:45,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:13:45,564 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:13:45,564 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:13:45,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:13:45,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:13:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-10-29 13:13:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 13:13:45,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:45,593 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] [2020-10-29 13:13:45,593 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash -423992621, now seen corresponding path program 1 times [2020-10-29 13:13:45,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:45,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154992562] [2020-10-29 13:13:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:46,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 13:13:48,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:13:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2445 [2020-10-29 13:13:48,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:13:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:13:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:13:48,581 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:13:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:48,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:48,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:48,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:13:48,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:48,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:48,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:48,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:48,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154992562] [2020-10-29 13:13:48,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:48,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:48,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957598539] [2020-10-29 13:13:48,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:48,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:48,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:48,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:48,652 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 6 states. [2020-10-29 13:13:48,892 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:13:49,403 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:13:49,575 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:13:49,737 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:13:49,875 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:13:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:49,940 INFO L93 Difference]: Finished difference Result 341 states and 532 transitions. [2020-10-29 13:13:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:49,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-29 13:13:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:49,966 INFO L225 Difference]: With dead ends: 341 [2020-10-29 13:13:49,966 INFO L226 Difference]: Without dead ends: 269 [2020-10-29 13:13:49,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:13:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-29 13:13:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 102. [2020-10-29 13:13:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 13:13:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 147 transitions. [2020-10-29 13:13:50,035 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 147 transitions. Word has length 41 [2020-10-29 13:13:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:50,036 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 147 transitions. [2020-10-29 13:13:50,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 147 transitions. [2020-10-29 13:13:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:13:50,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:50,038 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] [2020-10-29 13:13:50,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:13:50,039 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1863949304, now seen corresponding path program 1 times [2020-10-29 13:13:50,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:50,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521360260] [2020-10-29 13:13:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:50,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:53,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:13:53,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:13:53,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3903 [2020-10-29 13:13:53,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:53,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:13:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:13:53,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:54,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:54,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:54,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:54,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:54,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:13:54,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:54,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:54,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:54,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521360260] [2020-10-29 13:13:54,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:54,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:54,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820475599] [2020-10-29 13:13:54,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:54,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:54,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:54,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:54,159 INFO L87 Difference]: Start difference. First operand 102 states and 147 transitions. Second operand 6 states. [2020-10-29 13:13:54,330 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:13:54,705 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:13:54,853 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-29 13:13:54,977 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:13:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:55,052 INFO L93 Difference]: Finished difference Result 445 states and 681 transitions. [2020-10-29 13:13:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:55,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 13:13:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:55,057 INFO L225 Difference]: With dead ends: 445 [2020-10-29 13:13:55,057 INFO L226 Difference]: Without dead ends: 366 [2020-10-29 13:13:55,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:13:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-29 13:13:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 212. [2020-10-29 13:13:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-29 13:13:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2020-10-29 13:13:55,110 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 43 [2020-10-29 13:13:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:55,111 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2020-10-29 13:13:55,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2020-10-29 13:13:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:13:55,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:55,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:55,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:13:55,118 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1127847422, now seen corresponding path program 1 times [2020-10-29 13:13:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:55,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381520565] [2020-10-29 13:13:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:58,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:13:58,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:13:58,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3387 [2020-10-29 13:13:58,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:58,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:58,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:58,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:13:58,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:13:58,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:58,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:58,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:58,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:58,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:13:58,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:58,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:58,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:58,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:58,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:58,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:58,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381520565] [2020-10-29 13:13:58,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:58,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:58,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447335099] [2020-10-29 13:13:58,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:58,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:58,739 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand 6 states. [2020-10-29 13:13:58,884 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:13:59,345 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-29 13:13:59,467 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:13:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:59,505 INFO L93 Difference]: Finished difference Result 577 states and 885 transitions. [2020-10-29 13:13:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:59,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 13:13:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:59,509 INFO L225 Difference]: With dead ends: 577 [2020-10-29 13:13:59,509 INFO L226 Difference]: Without dead ends: 464 [2020-10-29 13:13:59,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:13:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-10-29 13:13:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 326. [2020-10-29 13:13:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-29 13:13:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 502 transitions. [2020-10-29 13:13:59,549 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 502 transitions. Word has length 43 [2020-10-29 13:13:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:59,549 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 502 transitions. [2020-10-29 13:13:59,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 502 transitions. [2020-10-29 13:13:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:13:59,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:59,551 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] [2020-10-29 13:13:59,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:13:59,552 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash -736230407, now seen corresponding path program 1 times [2020-10-29 13:13:59,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:59,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769596625] [2020-10-29 13:13:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:00,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:14:00,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:14:00,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-29 13:14:00,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:00,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:14:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:14:00,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:00,884 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:00,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:00,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:00,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:00,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:14:00,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:00,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:00,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:00,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769596625] [2020-10-29 13:14:00,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:00,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:00,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178851343] [2020-10-29 13:14:00,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:00,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:00,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:00,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:00,919 INFO L87 Difference]: Start difference. First operand 326 states and 502 transitions. Second operand 6 states. [2020-10-29 13:14:01,097 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:14:01,465 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:14:01,610 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:14:01,769 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:14:01,915 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:14:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:01,963 INFO L93 Difference]: Finished difference Result 754 states and 1166 transitions. [2020-10-29 13:14:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:01,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 13:14:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:01,966 INFO L225 Difference]: With dead ends: 754 [2020-10-29 13:14:01,966 INFO L226 Difference]: Without dead ends: 451 [2020-10-29 13:14:01,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:14:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-29 13:14:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 326. [2020-10-29 13:14:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-29 13:14:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 498 transitions. [2020-10-29 13:14:02,000 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 498 transitions. Word has length 43 [2020-10-29 13:14:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:02,000 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 498 transitions. [2020-10-29 13:14:02,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 498 transitions. [2020-10-29 13:14:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:14:02,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:02,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:02,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:14:02,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1357760040, now seen corresponding path program 1 times [2020-10-29 13:14:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:02,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700614388] [2020-10-29 13:14:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:03,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:14:03,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:14:03,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1252 [2020-10-29 13:14:03,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:03,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:14:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:14:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:14:03,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:03,460 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:03,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:03,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:03,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:03,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:03,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:14:03,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:03,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:03,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:03,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:03,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:03,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700614388] [2020-10-29 13:14:03,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:03,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:03,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418513026] [2020-10-29 13:14:03,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:14:03,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:14:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:14:03,507 INFO L87 Difference]: Start difference. First operand 326 states and 498 transitions. Second operand 5 states. [2020-10-29 13:14:03,642 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:14:04,051 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:14:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:04,135 INFO L93 Difference]: Finished difference Result 1183 states and 1835 transitions. [2020-10-29 13:14:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:14:04,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-29 13:14:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:04,141 INFO L225 Difference]: With dead ends: 1183 [2020-10-29 13:14:04,142 INFO L226 Difference]: Without dead ends: 880 [2020-10-29 13:14:04,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:14:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2020-10-29 13:14:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 874. [2020-10-29 13:14:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-29 13:14:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1334 transitions. [2020-10-29 13:14:04,210 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1334 transitions. Word has length 43 [2020-10-29 13:14:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:04,211 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1334 transitions. [2020-10-29 13:14:04,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:14:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1334 transitions. [2020-10-29 13:14:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:14:04,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:04,213 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] [2020-10-29 13:14:04,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:14:04,213 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:04,214 INFO L82 PathProgramCache]: Analyzing trace with hash -527350130, now seen corresponding path program 1 times [2020-10-29 13:14:04,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:04,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192663528] [2020-10-29 13:14:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:04,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:07,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:07,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:14:07,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:14:07,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3112 [2020-10-29 13:14:07,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:07,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:14:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:14:07,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:07,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:07,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:07,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:07,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:07,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:07,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:14:07,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:07,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:07,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192663528] [2020-10-29 13:14:07,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:07,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:07,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220072912] [2020-10-29 13:14:07,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:07,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:07,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:07,541 INFO L87 Difference]: Start difference. First operand 874 states and 1334 transitions. Second operand 6 states. [2020-10-29 13:14:07,713 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:14:08,140 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:14:08,370 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:14:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:08,523 INFO L93 Difference]: Finished difference Result 1589 states and 2423 transitions. [2020-10-29 13:14:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:14:08,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 13:14:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:08,532 INFO L225 Difference]: With dead ends: 1589 [2020-10-29 13:14:08,532 INFO L226 Difference]: Without dead ends: 1381 [2020-10-29 13:14:08,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:14:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2020-10-29 13:14:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1016. [2020-10-29 13:14:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2020-10-29 13:14:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1553 transitions. [2020-10-29 13:14:08,616 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1553 transitions. Word has length 43 [2020-10-29 13:14:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:08,617 INFO L481 AbstractCegarLoop]: Abstraction has 1016 states and 1553 transitions. [2020-10-29 13:14:08,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1553 transitions. [2020-10-29 13:14:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:14:08,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:08,620 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] [2020-10-29 13:14:08,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:14:08,621 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1407608734, now seen corresponding path program 1 times [2020-10-29 13:14:08,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:08,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791470173] [2020-10-29 13:14:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:08,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:09,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:09,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:14:09,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:14:09,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-29 13:14:09,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:09,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:14:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:14:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:09,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:09,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:09,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:09,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:14:09,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:09,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:09,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:09,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:09,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791470173] [2020-10-29 13:14:09,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:09,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:14:09,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975847703] [2020-10-29 13:14:09,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:14:09,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:09,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:14:09,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:14:09,420 INFO L87 Difference]: Start difference. First operand 1016 states and 1553 transitions. Second operand 4 states. [2020-10-29 13:14:09,541 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:14:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:09,890 INFO L93 Difference]: Finished difference Result 2778 states and 4249 transitions. [2020-10-29 13:14:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:14:09,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:14:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:09,906 INFO L225 Difference]: With dead ends: 2778 [2020-10-29 13:14:09,907 INFO L226 Difference]: Without dead ends: 1785 [2020-10-29 13:14:09,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:14:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2020-10-29 13:14:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1782. [2020-10-29 13:14:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2020-10-29 13:14:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2689 transitions. [2020-10-29 13:14:10,067 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2689 transitions. Word has length 44 [2020-10-29 13:14:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:10,067 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 2689 transitions. [2020-10-29 13:14:10,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:14:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2689 transitions. [2020-10-29 13:14:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:14:10,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:10,068 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] [2020-10-29 13:14:10,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:14:10,069 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:10,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2108249250, now seen corresponding path program 1 times [2020-10-29 13:14:10,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:10,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309093866] [2020-10-29 13:14:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:10,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:11,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:14:11,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:14:11,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-29 13:14:11,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:11,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:14:11,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:11,314 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:11,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:11,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:11,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:11,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:14:11,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:11,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:11,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:11,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:11,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:11,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:11,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309093866] [2020-10-29 13:14:11,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:11,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:11,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120495287] [2020-10-29 13:14:11,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:11,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:11,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:11,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:11,382 INFO L87 Difference]: Start difference. First operand 1782 states and 2689 transitions. Second operand 6 states. [2020-10-29 13:14:11,521 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:11,913 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:14:12,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:12,160 INFO L93 Difference]: Finished difference Result 5272 states and 7965 transitions. [2020-10-29 13:14:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:14:12,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-29 13:14:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:12,180 INFO L225 Difference]: With dead ends: 5272 [2020-10-29 13:14:12,180 INFO L226 Difference]: Without dead ends: 3513 [2020-10-29 13:14:12,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2020-10-29 13:14:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3510. [2020-10-29 13:14:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3510 states. [2020-10-29 13:14:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 5269 transitions. [2020-10-29 13:14:12,464 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 5269 transitions. Word has length 45 [2020-10-29 13:14:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:12,464 INFO L481 AbstractCegarLoop]: Abstraction has 3510 states and 5269 transitions. [2020-10-29 13:14:12,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 5269 transitions. [2020-10-29 13:14:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:14:12,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:12,466 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] [2020-10-29 13:14:12,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:14:12,466 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1414854393, now seen corresponding path program 1 times [2020-10-29 13:14:12,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:12,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262473306] [2020-10-29 13:14:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:12,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:12,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:14:12,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:14:12,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-29 13:14:12,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:12,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:12,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:12,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:14:12,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:14:12,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:12,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:12,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:12,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:12,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:13,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262473306] [2020-10-29 13:14:13,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:13,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:14:13,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72926085] [2020-10-29 13:14:13,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:14:13,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:14:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:14:13,010 INFO L87 Difference]: Start difference. First operand 3510 states and 5269 transitions. Second operand 4 states. [2020-10-29 13:14:13,146 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:14:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:13,759 INFO L93 Difference]: Finished difference Result 7876 states and 11819 transitions. [2020-10-29 13:14:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:14:13,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-29 13:14:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:13,787 INFO L225 Difference]: With dead ends: 7876 [2020-10-29 13:14:13,787 INFO L226 Difference]: Without dead ends: 5412 [2020-10-29 13:14:13,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:14:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states. [2020-10-29 13:14:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5412 to 5409. [2020-10-29 13:14:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5409 states. [2020-10-29 13:14:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 8022 transitions. [2020-10-29 13:14:14,259 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 8022 transitions. Word has length 45 [2020-10-29 13:14:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:14,260 INFO L481 AbstractCegarLoop]: Abstraction has 5409 states and 8022 transitions. [2020-10-29 13:14:14,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:14:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 8022 transitions. [2020-10-29 13:14:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:14:14,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:14,261 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] [2020-10-29 13:14:14,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:14:14,261 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash 190227245, now seen corresponding path program 1 times [2020-10-29 13:14:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:14,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134244363] [2020-10-29 13:14:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:14,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:14,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:14:14,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:14:14,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-29 13:14:14,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:14,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:14,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:14:14,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:14,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:14,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:14,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:14,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:14:14,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:14,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:14,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:14,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134244363] [2020-10-29 13:14:14,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:14,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:14,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118031381] [2020-10-29 13:14:14,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:14,991 INFO L87 Difference]: Start difference. First operand 5409 states and 8022 transitions. Second operand 6 states. [2020-10-29 13:14:15,174 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:14:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:15,857 INFO L93 Difference]: Finished difference Result 10793 states and 16019 transitions. [2020-10-29 13:14:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:14:15,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-29 13:14:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:15,883 INFO L225 Difference]: With dead ends: 10793 [2020-10-29 13:14:15,883 INFO L226 Difference]: Without dead ends: 5409 [2020-10-29 13:14:15,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2020-10-29 13:14:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5409. [2020-10-29 13:14:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5409 states. [2020-10-29 13:14:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 7910 transitions. [2020-10-29 13:14:16,377 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 7910 transitions. Word has length 46 [2020-10-29 13:14:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:16,377 INFO L481 AbstractCegarLoop]: Abstraction has 5409 states and 7910 transitions. [2020-10-29 13:14:16,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 7910 transitions. [2020-10-29 13:14:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:14:16,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:16,378 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] [2020-10-29 13:14:16,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:14:16,379 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash 318312552, now seen corresponding path program 1 times [2020-10-29 13:14:16,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:16,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628772358] [2020-10-29 13:14:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:16,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:16,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:16,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:16,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:14:16,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:14:16,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-29 13:14:16,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:16,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:16,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:16,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:14:16,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:14:16,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:16,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:16,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:16,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:16,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:16,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:16,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:14:16,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:16,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:16,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:16,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:16,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:16,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:16,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628772358] [2020-10-29 13:14:16,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:16,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:14:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843045094] [2020-10-29 13:14:16,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:14:16,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:14:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:14:16,700 INFO L87 Difference]: Start difference. First operand 5409 states and 7910 transitions. Second operand 4 states. [2020-10-29 13:14:16,824 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:14:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:17,722 INFO L93 Difference]: Finished difference Result 14673 states and 21236 transitions. [2020-10-29 13:14:17,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:14:17,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-29 13:14:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:17,764 INFO L225 Difference]: With dead ends: 14673 [2020-10-29 13:14:17,765 INFO L226 Difference]: Without dead ends: 9289 [2020-10-29 13:14:17,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:14:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9289 states. [2020-10-29 13:14:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9289 to 9286. [2020-10-29 13:14:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9286 states. [2020-10-29 13:14:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9286 states to 9286 states and 13161 transitions. [2020-10-29 13:14:18,599 INFO L78 Accepts]: Start accepts. Automaton has 9286 states and 13161 transitions. Word has length 46 [2020-10-29 13:14:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:18,600 INFO L481 AbstractCegarLoop]: Abstraction has 9286 states and 13161 transitions. [2020-10-29 13:14:18,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:14:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9286 states and 13161 transitions. [2020-10-29 13:14:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:14:18,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:18,601 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] [2020-10-29 13:14:18,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:14:18,601 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash -867895622, now seen corresponding path program 1 times [2020-10-29 13:14:18,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:18,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998014148] [2020-10-29 13:14:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:18,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:18,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:14:18,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:18,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-29 13:14:18,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:18,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:14:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-29 13:14:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:14:18,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:18,882 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:18,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:18,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:18,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:18,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:18,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:14:18,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:18,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:18,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:18,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998014148] [2020-10-29 13:14:18,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:18,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:18,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748136416] [2020-10-29 13:14:18,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:14:18,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:18,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:14:18,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:14:18,909 INFO L87 Difference]: Start difference. First operand 9286 states and 13161 transitions. Second operand 5 states. [2020-10-29 13:14:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:20,243 INFO L93 Difference]: Finished difference Result 14133 states and 19949 transitions. [2020-10-29 13:14:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:14:20,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-29 13:14:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:20,276 INFO L225 Difference]: With dead ends: 14133 [2020-10-29 13:14:20,276 INFO L226 Difference]: Without dead ends: 14130 [2020-10-29 13:14:20,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2020-10-29 13:14:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 9574. [2020-10-29 13:14:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9574 states. [2020-10-29 13:14:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9574 states to 9574 states and 13337 transitions. [2020-10-29 13:14:21,044 INFO L78 Accepts]: Start accepts. Automaton has 9574 states and 13337 transitions. Word has length 47 [2020-10-29 13:14:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:21,044 INFO L481 AbstractCegarLoop]: Abstraction has 9574 states and 13337 transitions. [2020-10-29 13:14:21,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:14:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9574 states and 13337 transitions. [2020-10-29 13:14:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:14:21,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:21,046 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:21,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:14:21,046 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1092450070, now seen corresponding path program 1 times [2020-10-29 13:14:21,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:21,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497198988] [2020-10-29 13:14:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:21,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:26,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:26,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:14:26,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:14:26,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-29 13:14:26,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:26,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:14:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:14:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:26,594 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:26,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:26,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:26,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:26,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:26,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:26,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:14:26,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:26,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:26,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:26,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:26,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497198988] [2020-10-29 13:14:26,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:14:26,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:14:26,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452530013] [2020-10-29 13:14:26,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:14:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:14:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:14:26,655 INFO L87 Difference]: Start difference. First operand 9574 states and 13337 transitions. Second operand 10 states. [2020-10-29 13:14:26,933 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:14:28,899 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:14:29,152 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:14:29,354 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:14:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:33,959 INFO L93 Difference]: Finished difference Result 49419 states and 68085 transitions. [2020-10-29 13:14:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 13:14:33,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-29 13:14:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:34,059 INFO L225 Difference]: With dead ends: 49419 [2020-10-29 13:14:34,059 INFO L226 Difference]: Without dead ends: 44442 [2020-10-29 13:14:34,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2020-10-29 13:14:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44442 states. [2020-10-29 13:14:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44442 to 22062. [2020-10-29 13:14:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22062 states. [2020-10-29 13:14:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 30825 transitions. [2020-10-29 13:14:37,325 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 30825 transitions. Word has length 67 [2020-10-29 13:14:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:37,326 INFO L481 AbstractCegarLoop]: Abstraction has 22062 states and 30825 transitions. [2020-10-29 13:14:37,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:14:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 30825 transitions. [2020-10-29 13:14:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:14:37,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:37,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:37,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:14:37,330 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash 208371847, now seen corresponding path program 1 times [2020-10-29 13:14:37,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:37,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78508858] [2020-10-29 13:14:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:37,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:14:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:42,564 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-29 13:14:42,762 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:42,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:42,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:42,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:42,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:42,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:14:42,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:42,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:42,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:42,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78508858] [2020-10-29 13:14:42,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:14:42,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:14:42,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974887181] [2020-10-29 13:14:42,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:42,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:42,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:42,868 INFO L87 Difference]: Start difference. First operand 22062 states and 30825 transitions. Second operand 9 states. [2020-10-29 13:14:43,050 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:14:44,902 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:14:45,153 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:14:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:51,019 INFO L93 Difference]: Finished difference Result 66696 states and 91742 transitions. [2020-10-29 13:14:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 13:14:51,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-29 13:14:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:51,106 INFO L225 Difference]: With dead ends: 66696 [2020-10-29 13:14:51,106 INFO L226 Difference]: Without dead ends: 44659 [2020-10-29 13:14:51,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-10-29 13:14:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44659 states. [2020-10-29 13:14:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44659 to 22062. [2020-10-29 13:14:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22062 states. [2020-10-29 13:14:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 30565 transitions. [2020-10-29 13:14:54,472 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 30565 transitions. Word has length 67 [2020-10-29 13:14:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:54,473 INFO L481 AbstractCegarLoop]: Abstraction has 22062 states and 30565 transitions. [2020-10-29 13:14:54,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 30565 transitions. [2020-10-29 13:14:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:14:54,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:54,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:54,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:14:54,475 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1882100136, now seen corresponding path program 1 times [2020-10-29 13:14:54,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:54,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800717428] [2020-10-29 13:14:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:54,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:59,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:14:59,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:14:59,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 13:14:59,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:59,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:59,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:59,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:59,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:14:59,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:59,842 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:59,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:59,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:59,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:59,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:59,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:14:59,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:59,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:59,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:59,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800717428] [2020-10-29 13:14:59,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:14:59,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:14:59,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369720324] [2020-10-29 13:14:59,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:59,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:59,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:59,886 INFO L87 Difference]: Start difference. First operand 22062 states and 30565 transitions. Second operand 9 states. [2020-10-29 13:15:00,124 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:15:01,637 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:15:01,824 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:15:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:09,451 INFO L93 Difference]: Finished difference Result 74050 states and 101942 transitions. [2020-10-29 13:15:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 13:15:09,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-29 13:15:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:09,534 INFO L225 Difference]: With dead ends: 74050 [2020-10-29 13:15:09,534 INFO L226 Difference]: Without dead ends: 59773 [2020-10-29 13:15:09,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:15:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59773 states. [2020-10-29 13:15:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59773 to 34519. [2020-10-29 13:15:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34519 states. [2020-10-29 13:15:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34519 states to 34519 states and 47649 transitions. [2020-10-29 13:15:14,606 INFO L78 Accepts]: Start accepts. Automaton has 34519 states and 47649 transitions. Word has length 68 [2020-10-29 13:15:14,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:14,606 INFO L481 AbstractCegarLoop]: Abstraction has 34519 states and 47649 transitions. [2020-10-29 13:15:14,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 34519 states and 47649 transitions. [2020-10-29 13:15:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:15:14,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:14,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:14,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:15:14,609 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349988, now seen corresponding path program 1 times [2020-10-29 13:15:14,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:14,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932559431] [2020-10-29 13:15:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:19,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:15:19,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:15:19,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:15:19,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:19,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:15:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:19,812 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-29 13:15:19,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:19,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:19,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:19,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:19,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:15:19,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:19,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:19,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:19,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:19,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932559431] [2020-10-29 13:15:19,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:15:19,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:15:19,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993452379] [2020-10-29 13:15:19,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:19,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:19,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:19,989 INFO L87 Difference]: Start difference. First operand 34519 states and 47649 transitions. Second operand 9 states. [2020-10-29 13:15:20,154 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:15:21,859 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:15:22,032 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:15:22,205 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:15:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:55,399 INFO L93 Difference]: Finished difference Result 248554 states and 337390 transitions. [2020-10-29 13:15:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 13:15:55,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-29 13:15:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:55,921 INFO L225 Difference]: With dead ends: 248554 [2020-10-29 13:15:55,922 INFO L226 Difference]: Without dead ends: 214060 [2020-10-29 13:15:55,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:15:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214060 states. [2020-10-29 13:16:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214060 to 119687. [2020-10-29 13:16:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119687 states. [2020-10-29 13:16:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119687 states to 119687 states and 163292 transitions. [2020-10-29 13:16:15,272 INFO L78 Accepts]: Start accepts. Automaton has 119687 states and 163292 transitions. Word has length 68 [2020-10-29 13:16:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:15,272 INFO L481 AbstractCegarLoop]: Abstraction has 119687 states and 163292 transitions. [2020-10-29 13:16:15,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:16:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 119687 states and 163292 transitions. [2020-10-29 13:16:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:16:15,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:15,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:15,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:16:15,277 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:15,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1605515426, now seen corresponding path program 1 times [2020-10-29 13:16:15,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:15,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458609759] [2020-10-29 13:16:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:18,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:16:18,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:16:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3572 [2020-10-29 13:16:18,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:18,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:16:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:16:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:19,180 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:16:19,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:19,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:19,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:19,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:19,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:19,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:19,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:19,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:19,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458609759] [2020-10-29 13:16:19,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:16:19,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:16:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182664165] [2020-10-29 13:16:19,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:16:19,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:16:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:16:19,214 INFO L87 Difference]: Start difference. First operand 119687 states and 163292 transitions. Second operand 10 states. [2020-10-29 13:16:19,365 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:16:21,013 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:16:21,259 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:16:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:54,568 INFO L93 Difference]: Finished difference Result 242157 states and 329328 transitions. [2020-10-29 13:16:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:16:54,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-29 13:16:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:54,890 INFO L225 Difference]: With dead ends: 242157 [2020-10-29 13:16:54,890 INFO L226 Difference]: Without dead ends: 203240 [2020-10-29 13:16:54,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:16:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203240 states. [2020-10-29 13:17:14,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203240 to 120223. [2020-10-29 13:17:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120223 states. [2020-10-29 13:17:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120223 states to 120223 states and 164096 transitions. [2020-10-29 13:17:15,208 INFO L78 Accepts]: Start accepts. Automaton has 120223 states and 164096 transitions. Word has length 68 [2020-10-29 13:17:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:15,209 INFO L481 AbstractCegarLoop]: Abstraction has 120223 states and 164096 transitions. [2020-10-29 13:17:15,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:17:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 120223 states and 164096 transitions. [2020-10-29 13:17:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:17:15,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:15,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:15,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:17:15,214 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2085690878, now seen corresponding path program 1 times [2020-10-29 13:17:15,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:15,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713749041] [2020-10-29 13:17:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:20,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:20,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:17:20,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:17:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:17:20,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:20,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:17:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:17:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:17:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:20,430 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:17:20,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:20,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:20,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:20,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:20,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:20,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:17:20,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:20,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:20,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:17:20,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:20,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:17:20,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:20,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713749041] [2020-10-29 13:17:20,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:17:20,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:17:20,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058571464] [2020-10-29 13:17:20,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:17:20,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:20,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:17:20,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:17:20,465 INFO L87 Difference]: Start difference. First operand 120223 states and 164096 transitions. Second operand 9 states. [2020-10-29 13:17:20,609 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:17:21,504 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:17:21,651 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 124