/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:59:19,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:59:19,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:59:19,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:59:19,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:59:19,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:59:19,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:59:19,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:59:19,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:59:19,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:59:19,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:59:19,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:59:19,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:59:19,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:59:19,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:59:19,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:59:19,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:59:19,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:59:19,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:59:19,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:59:19,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:59:19,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:59:19,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:59:19,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:59:19,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:59:19,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:59:19,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:59:19,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:59:19,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:59:19,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:59:19,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:59:19,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:59:19,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:59:19,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:59:19,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:59:19,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:59:19,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:59:19,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:59:19,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:59:19,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:59:19,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:59:19,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:59:19,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:59:19,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:59:19,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:59:19,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:59:19,995 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:59:19,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:59:19,995 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:59:19,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:59:19,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:59:19,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:59:19,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:59:19,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:59:19,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:59:19,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:59:19,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:59:19,998 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:59:19,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:59:19,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:59:19,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:59:19,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:59:20,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:59:20,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:59:20,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:59:20,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:59:20,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:59:20,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:59:20,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:59:20,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:59:20,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:59:20,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:59:20,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:59:20,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:59:20,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:59:20,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:59:20,438 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:59:20,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2020-10-28 08:59:20,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f735b5e41/030cdffcf806495ca9041122b221e1eb/FLAGb1220b834 [2020-10-28 08:59:21,131 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:59:21,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2020-10-28 08:59:21,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f735b5e41/030cdffcf806495ca9041122b221e1eb/FLAGb1220b834 [2020-10-28 08:59:21,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f735b5e41/030cdffcf806495ca9041122b221e1eb [2020-10-28 08:59:21,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:59:21,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:59:21,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:59:21,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:59:21,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:59:21,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f5651c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21, skipping insertion in model container [2020-10-28 08:59:21,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:59:21,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:59:21,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:59:21,743 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:59:21,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:59:21,779 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:59:21,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21 WrapperNode [2020-10-28 08:59:21,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:59:21,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:59:21,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:59:21,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:59:21,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... [2020-10-28 08:59:21,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:59:21,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:59:21,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:59:21,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:59:21,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:59:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:59:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:59:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:59:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:59:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:59:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:59:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:59:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:59:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:59:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:59:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:59:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:59:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:59:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:59:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:59:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:59:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:59:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:59:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:59:22,305 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:59:22,305 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:59:22,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:59:22 BoogieIcfgContainer [2020-10-28 08:59:22,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:59:22,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:59:22,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:59:22,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:59:22,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:59:21" (1/3) ... [2020-10-28 08:59:22,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3f8371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:59:22, skipping insertion in model container [2020-10-28 08:59:22,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:21" (2/3) ... [2020-10-28 08:59:22,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3f8371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:59:22, skipping insertion in model container [2020-10-28 08:59:22,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:59:22" (3/3) ... [2020-10-28 08:59:22,341 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2020-10-28 08:59:22,355 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:59:22,360 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:59:22,375 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:59:22,418 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:59:22,418 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:59:22,418 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:59:22,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:59:22,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:59:22,419 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:59:22,419 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:59:22,419 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:59:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-28 08:59:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:59:22,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:22,449 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] [2020-10-28 08:59:22,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -18791634, now seen corresponding path program 1 times [2020-10-28 08:59:22,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:22,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565042891] [2020-10-28 08:59:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:22,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:22,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:22,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:23,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:23,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:59:23,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:23,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-28 08:59:23,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:23,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:59:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:59:23,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:23,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:23,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:23,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:23,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:59:23,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:23,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:23,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:23,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:23,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:23,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:23,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565042891] [2020-10-28 08:59:23,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:59:23,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:59:23,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100360952] [2020-10-28 08:59:23,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:59:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:23,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:59:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:59:23,473 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-28 08:59:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:23,596 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2020-10-28 08:59:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:59:23,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 08:59:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:23,606 INFO L225 Difference]: With dead ends: 58 [2020-10-28 08:59:23,606 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 08:59:23,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:59:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 08:59:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 08:59:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 08:59:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-28 08:59:23,653 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-10-28 08:59:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:23,653 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-28 08:59:23,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:59:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-28 08:59:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:59:23,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:23,655 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] [2020-10-28 08:59:23,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:59:23,656 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1154820394, now seen corresponding path program 1 times [2020-10-28 08:59:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:23,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087402930] [2020-10-28 08:59:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:23,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:23,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:23,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:24,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:59:24,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-28 08:59:24,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:24,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:59:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:59:24,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:59:24,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:24,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:24,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:24,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:24,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:24,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:24,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:24,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:24,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:24,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:24,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:24,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:24,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087402930] [2020-10-28 08:59:24,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:59:24,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:59:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033452093] [2020-10-28 08:59:24,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:59:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:59:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:59:24,117 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-28 08:59:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:24,246 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-28 08:59:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:59:24,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 08:59:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:24,248 INFO L225 Difference]: With dead ends: 49 [2020-10-28 08:59:24,248 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:59:24,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:59:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:59:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 08:59:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:59:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-28 08:59:24,258 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-28 08:59:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:24,259 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-28 08:59:24,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:59:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-28 08:59:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:59:24,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:24,260 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] [2020-10-28 08:59:24,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:59:24,261 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159768, now seen corresponding path program 1 times [2020-10-28 08:59:24,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:24,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329512418] [2020-10-28 08:59:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:24,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:25,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:59:25,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:25,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-28 08:59:25,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:25,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:59:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 08:59:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:59:25,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:25,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:25,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:25,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:25,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:59:25,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:25,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:25,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 08:59:25,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329512418] [2020-10-28 08:59:25,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:25,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:59:25,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38066859] [2020-10-28 08:59:25,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:59:25,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:59:25,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:59:25,838 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-10-28 08:59:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:25,989 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-28 08:59:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:59:25,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-28 08:59:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:25,991 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:59:25,991 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 08:59:25,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:59:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 08:59:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 08:59:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:59:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 08:59:26,000 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2020-10-28 08:59:26,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:26,000 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 08:59:26,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:59:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 08:59:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:59:26,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:26,002 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:59:26,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:59:26,002 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2050662806, now seen corresponding path program 2 times [2020-10-28 08:59:26,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:26,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139311807] [2020-10-28 08:59:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:26,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:26,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:26,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:26,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:30,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:59:30,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:30,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4870 [2020-10-28 08:59:30,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:30,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:30,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:59:30,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:59:30,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:59:30,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:30,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:30,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:30,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:30,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:30,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:30,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:30,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:30,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:30,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:30,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:59:30,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139311807] [2020-10-28 08:59:30,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:30,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:59:30,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087261081] [2020-10-28 08:59:30,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:59:30,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:59:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:59:30,980 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-10-28 08:59:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:31,137 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-28 08:59:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:59:31,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 08:59:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:31,139 INFO L225 Difference]: With dead ends: 63 [2020-10-28 08:59:31,139 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 08:59:31,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:59:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 08:59:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 08:59:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:59:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 08:59:31,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-10-28 08:59:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:31,148 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 08:59:31,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:59:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 08:59:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:59:31,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:31,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:31,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:59:31,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1849014952, now seen corresponding path program 3 times [2020-10-28 08:59:31,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:31,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948222744] [2020-10-28 08:59:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:31,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:31,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:36,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:59:36,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:36,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:59:36,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:36,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:59:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 08:59:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:59:36,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:36,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:36,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:36,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:36,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:36,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:36,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:36,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:36,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 08:59:36,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948222744] [2020-10-28 08:59:36,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:36,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:59:36,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649216562] [2020-10-28 08:59:36,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:59:36,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:59:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:59:36,293 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2020-10-28 08:59:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:36,540 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-28 08:59:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:59:36,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-28 08:59:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:36,543 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:59:36,543 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:59:36,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:59:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:59:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:59:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:59:36,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 08:59:36,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2020-10-28 08:59:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:36,564 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 08:59:36,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:59:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 08:59:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 08:59:36,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:36,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:36,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:59:36,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1815544746, now seen corresponding path program 4 times [2020-10-28 08:59:36,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:36,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407891102] [2020-10-28 08:59:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:41,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 08:59:41,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:59:41,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:41,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:41,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:59:41,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:59:41,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:59:41,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:59:41,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:41,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:41,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:41,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:41,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:41,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:41,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 08:59:41,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407891102] [2020-10-28 08:59:41,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:41,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:59:41,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300432629] [2020-10-28 08:59:41,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:59:41,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:59:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:59:41,723 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-10-28 08:59:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:41,920 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-28 08:59:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:59:41,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 08:59:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:41,922 INFO L225 Difference]: With dead ends: 77 [2020-10-28 08:59:41,922 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:59:41,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:59:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:59:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 08:59:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 08:59:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 08:59:41,930 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-10-28 08:59:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:41,930 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 08:59:41,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:59:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 08:59:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:59:41,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:41,932 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:41,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:59:41,932 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1640122136, now seen corresponding path program 5 times [2020-10-28 08:59:41,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:41,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314214822] [2020-10-28 08:59:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:42,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:42,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:46,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:46,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:59:46,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:46,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:59:46,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:46,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:59:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:59:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:59:46,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:47,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:47,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:47,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:47,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:47,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:47,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:47,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:47,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 08:59:47,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314214822] [2020-10-28 08:59:47,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:47,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:59:47,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384343483] [2020-10-28 08:59:47,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:59:47,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:47,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:59:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:59:47,094 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2020-10-28 08:59:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:47,264 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-28 08:59:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:59:47,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-28 08:59:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:47,266 INFO L225 Difference]: With dead ends: 84 [2020-10-28 08:59:47,266 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 08:59:47,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:59:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 08:59:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 08:59:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 08:59:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-28 08:59:47,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2020-10-28 08:59:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:47,274 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-28 08:59:47,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:59:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-28 08:59:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:59:47,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:47,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:47,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:59:47,276 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:47,276 INFO L82 PathProgramCache]: Analyzing trace with hash 325196010, now seen corresponding path program 6 times [2020-10-28 08:59:47,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:47,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389018925] [2020-10-28 08:59:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:47,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:52,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:59:52,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:52,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:59:52,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:52,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:52,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:59:52,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:59:52,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:59:52,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:52,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:52,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:52,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:52,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:52,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:52,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:52,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-28 08:59:52,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389018925] [2020-10-28 08:59:52,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:52,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:59:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424386106] [2020-10-28 08:59:52,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:59:52,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:59:52,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:52,455 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2020-10-28 08:59:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:52,657 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-28 08:59:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:59:52,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 08:59:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:52,658 INFO L225 Difference]: With dead ends: 91 [2020-10-28 08:59:52,658 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 08:59:52,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 08:59:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 08:59:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:59:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-28 08:59:52,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 45 [2020-10-28 08:59:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:52,673 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-28 08:59:52,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:59:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-28 08:59:52,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:59:52,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:52,674 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:52,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:59:52,676 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1104640216, now seen corresponding path program 7 times [2020-10-28 08:59:52,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:52,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511114163] [2020-10-28 08:59:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:57,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:57,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:59:57,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:57,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:59:57,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:57,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:59:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:59:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 08:59:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:57,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:57,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:57,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:57,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:57,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:57,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:57,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:57,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-28 08:59:57,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511114163] [2020-10-28 08:59:57,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:57,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:59:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826567334] [2020-10-28 08:59:57,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:59:57,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:57,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:59:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:59:57,927 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2020-10-28 08:59:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:58,056 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2020-10-28 08:59:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:59:58,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-28 08:59:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:58,058 INFO L225 Difference]: With dead ends: 98 [2020-10-28 08:59:58,058 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 08:59:58,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:59:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 08:59:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 08:59:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 08:59:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-28 08:59:58,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2020-10-28 08:59:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:58,079 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-28 08:59:58,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:59:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-28 08:59:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:59:58,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:58,080 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:58,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:59:58,081 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash -142696918, now seen corresponding path program 8 times [2020-10-28 08:59:58,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:58,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371991083] [2020-10-28 08:59:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:58,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:03,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:03,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:00:03,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:03,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:00:03,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:03,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:03,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:00:03,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:00:03,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:00:03,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:03,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:03,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:03,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:03,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:03,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:03,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:03,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 09:00:03,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371991083] [2020-10-28 09:00:03,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:03,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:00:03,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910451652] [2020-10-28 09:00:03,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:00:03,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:03,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:00:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:00:03,264 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2020-10-28 09:00:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:03,437 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-10-28 09:00:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:00:03,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-28 09:00:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:03,445 INFO L225 Difference]: With dead ends: 105 [2020-10-28 09:00:03,445 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:00:03,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:00:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:00:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 09:00:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 09:00:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-28 09:00:03,456 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 53 [2020-10-28 09:00:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:03,456 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-28 09:00:03,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:00:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-28 09:00:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:00:03,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:03,458 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:03,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:00:03,458 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash 958276968, now seen corresponding path program 9 times [2020-10-28 09:00:03,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:03,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272883146] [2020-10-28 09:00:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:03,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:03,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:08,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 09:00:08,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:08,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:00:08,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:08,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:08,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:00:08,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 09:00:08,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:00:08,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:08,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:08,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:08,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:08,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:08,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:08,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:08,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-28 09:00:08,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272883146] [2020-10-28 09:00:08,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:08,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:00:08,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907754588] [2020-10-28 09:00:08,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:00:08,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:08,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:00:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:00:08,651 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-10-28 09:00:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:08,857 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-10-28 09:00:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:00:08,858 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-28 09:00:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:08,859 INFO L225 Difference]: With dead ends: 112 [2020-10-28 09:00:08,859 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 09:00:08,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:00:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 09:00:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 09:00:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:00:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-28 09:00:08,875 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 57 [2020-10-28 09:00:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:08,876 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-28 09:00:08,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:00:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-28 09:00:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:00:08,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:08,877 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:08,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:00:08,880 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1975817066, now seen corresponding path program 10 times [2020-10-28 09:00:08,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:08,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000961641] [2020-10-28 09:00:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:08,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:13,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:13,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:00:13,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:13,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:00:13,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:13,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:00:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:00:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:00:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:14,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:14,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:14,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:14,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:14,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-28 09:00:14,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000961641] [2020-10-28 09:00:14,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:14,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:00:14,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156381491] [2020-10-28 09:00:14,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:00:14,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:14,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:00:14,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:00:14,087 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 14 states. [2020-10-28 09:00:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:14,304 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-28 09:00:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:00:14,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-28 09:00:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:14,305 INFO L225 Difference]: With dead ends: 119 [2020-10-28 09:00:14,305 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:00:14,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:00:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:00:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-28 09:00:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 09:00:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-28 09:00:14,314 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 61 [2020-10-28 09:00:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:14,314 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-28 09:00:14,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:00:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-28 09:00:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:00:14,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:14,315 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:14,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:00:14,316 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash -381250648, now seen corresponding path program 11 times [2020-10-28 09:00:14,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:14,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304291872] [2020-10-28 09:00:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:15,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:19,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:00:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:19,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:19,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:19,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:19,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:19,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:19,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:19,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:19,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:19,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:19,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:19,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:00:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304291872] [2020-10-28 09:00:19,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:19,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:00:19,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873415322] [2020-10-28 09:00:19,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:00:19,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:19,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:00:19,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:00:19,591 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 15 states. [2020-10-28 09:00:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:19,819 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-10-28 09:00:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:00:19,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-28 09:00:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:19,822 INFO L225 Difference]: With dead ends: 126 [2020-10-28 09:00:19,822 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:00:19,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:00:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:00:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-28 09:00:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:00:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-28 09:00:19,839 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 65 [2020-10-28 09:00:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:19,839 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-28 09:00:19,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:00:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-28 09:00:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:00:19,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:19,849 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:19,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:00:19,850 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:19,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1282144426, now seen corresponding path program 12 times [2020-10-28 09:00:19,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:19,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289045462] [2020-10-28 09:00:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:19,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:20,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:22,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:24,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:24,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 09:00:24,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:24,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:00:24,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:24,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:24,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:00:24,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:00:24,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:00:24,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:25,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:25,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:25,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:25,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:25,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:25,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:25,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:25,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:25,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:25,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:00:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-28 09:00:25,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289045462] [2020-10-28 09:00:25,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:25,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:00:25,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109708106] [2020-10-28 09:00:25,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:00:25,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:00:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:00:25,110 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 16 states. [2020-10-28 09:00:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:25,352 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2020-10-28 09:00:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:00:25,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-28 09:00:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:25,354 INFO L225 Difference]: With dead ends: 133 [2020-10-28 09:00:25,354 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:00:25,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:00:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:00:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 09:00:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:00:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-28 09:00:25,364 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 69 [2020-10-28 09:00:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:25,364 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-28 09:00:25,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:00:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-28 09:00:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:00:25,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:25,365 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:25,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:00:25,365 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1748381208, now seen corresponding path program 13 times [2020-10-28 09:00:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:25,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642011696] [2020-10-28 09:00:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:25,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:30,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:30,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:00:30,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:30,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:00:30,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:30,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:00:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:00:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:30,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:30,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:30,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:30,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:30,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:30,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:30,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:30,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:30,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:30,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:30,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-10-28 09:00:30,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642011696] [2020-10-28 09:00:30,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:30,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:00:30,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064349656] [2020-10-28 09:00:30,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:00:30,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:00:30,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:00:30,619 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-10-28 09:00:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:30,862 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2020-10-28 09:00:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:00:30,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-28 09:00:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:30,863 INFO L225 Difference]: With dead ends: 140 [2020-10-28 09:00:30,863 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 09:00:30,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:00:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 09:00:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-28 09:00:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 09:00:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-28 09:00:30,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2020-10-28 09:00:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:30,877 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-28 09:00:30,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:00:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-28 09:00:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:00:30,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:30,879 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:30,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:00:30,879 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash 447532522, now seen corresponding path program 14 times [2020-10-28 09:00:30,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:30,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270510017] [2020-10-28 09:00:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:31,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:33,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:35,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:35,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:00:35,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:00:35,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:35,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:00:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:00:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:00:35,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:36,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:36,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:36,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:36,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:36,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:00:36,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:36,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:36,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:36,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:36,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:36,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-28 09:00:36,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270510017] [2020-10-28 09:00:36,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:36,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:00:36,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256926575] [2020-10-28 09:00:36,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:00:36,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:36,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:00:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:00:36,185 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 18 states. [2020-10-28 09:00:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:36,388 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2020-10-28 09:00:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:00:36,389 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-10-28 09:00:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:36,390 INFO L225 Difference]: With dead ends: 147 [2020-10-28 09:00:36,390 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:00:36,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:00:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:00:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-28 09:00:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:00:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-28 09:00:36,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 77 [2020-10-28 09:00:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:36,397 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-28 09:00:36,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:00:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-28 09:00:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:00:36,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:36,398 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:36,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:00:36,398 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:36,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2093998120, now seen corresponding path program 15 times [2020-10-28 09:00:36,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:36,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106671375] [2020-10-28 09:00:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:36,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:36,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:40,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:41,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:00:41,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:41,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:41,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:41,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:41,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:41,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:41,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:41,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:41,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:41,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-28 09:00:41,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106671375] [2020-10-28 09:00:41,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:41,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:00:41,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729305081] [2020-10-28 09:00:41,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:00:41,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:00:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:00:41,701 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 19 states. [2020-10-28 09:00:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:41,944 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2020-10-28 09:00:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:00:41,945 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-28 09:00:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:41,946 INFO L225 Difference]: With dead ends: 154 [2020-10-28 09:00:41,946 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:00:41,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:00:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:00:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-28 09:00:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:00:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-28 09:00:41,953 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 81 [2020-10-28 09:00:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:41,953 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-28 09:00:41,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:00:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-28 09:00:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:00:41,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:41,954 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:41,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:00:41,955 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash -524348630, now seen corresponding path program 16 times [2020-10-28 09:00:41,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:41,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295359909] [2020-10-28 09:00:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:46,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:46,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:00:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:47,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:47,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:47,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:47,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:47,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:47,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:47,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:47,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:47,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:47,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:47,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:47,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-28 09:00:47,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295359909] [2020-10-28 09:00:47,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:47,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:00:47,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647589013] [2020-10-28 09:00:47,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:00:47,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:47,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:00:47,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:00:47,289 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-10-28 09:00:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:47,592 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-28 09:00:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:00:47,592 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-28 09:00:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:47,593 INFO L225 Difference]: With dead ends: 161 [2020-10-28 09:00:47,594 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 09:00:47,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:00:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 09:00:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-28 09:00:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 09:00:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-28 09:00:47,604 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 85 [2020-10-28 09:00:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:47,604 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-28 09:00:47,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:00:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-28 09:00:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:00:47,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:47,605 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:47,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:00:47,605 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1082081688, now seen corresponding path program 17 times [2020-10-28 09:00:47,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:47,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26345649] [2020-10-28 09:00:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:47,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:47,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:47,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:00:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:52,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:52,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:52,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:52,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:52,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:52,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:52,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-10-28 09:00:52,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26345649] [2020-10-28 09:00:52,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:52,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:00:52,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052027120] [2020-10-28 09:00:52,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:00:52,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:00:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:52,956 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 21 states. [2020-10-28 09:00:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:53,273 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2020-10-28 09:00:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:00:53,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-28 09:00:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:53,275 INFO L225 Difference]: With dead ends: 168 [2020-10-28 09:00:53,275 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 09:00:53,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 09:00:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 09:00:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 09:00:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-28 09:00:53,281 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 89 [2020-10-28 09:00:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:53,281 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-28 09:00:53,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:00:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-28 09:00:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 09:00:53,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:53,282 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:53,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:00:53,283 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2145044586, now seen corresponding path program 18 times [2020-10-28 09:00:53,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:53,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29745955] [2020-10-28 09:00:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:53,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:53,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:58,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:00:58,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:58,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:58,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:58,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:58,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:58,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:58,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:58,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:58,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:58,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:58,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:58,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:58,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-10-28 09:00:58,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29745955] [2020-10-28 09:00:58,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:58,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:00:58,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981406612] [2020-10-28 09:00:58,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:00:58,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:58,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:00:58,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:00:58,672 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 22 states. [2020-10-28 09:00:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:58,970 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-10-28 09:00:58,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:00:58,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-10-28 09:00:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:58,971 INFO L225 Difference]: With dead ends: 175 [2020-10-28 09:00:58,971 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:00:58,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:00:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:00:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 09:00:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:00:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-28 09:00:58,982 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 93 [2020-10-28 09:00:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:58,982 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-28 09:00:58,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:00:58,982 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-28 09:00:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:00:58,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:58,983 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:58,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:00:58,984 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -167482200, now seen corresponding path program 19 times [2020-10-28 09:00:58,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:58,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887204809] [2020-10-28 09:00:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:59,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:59,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:59,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:04,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:01:04,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:04,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:04,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:04,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:04,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-28 09:01:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887204809] [2020-10-28 09:01:04,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:04,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:01:04,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530109547] [2020-10-28 09:01:04,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:01:04,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:04,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:01:04,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:01:04,394 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-10-28 09:01:04,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:04,750 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2020-10-28 09:01:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:01:04,750 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-28 09:01:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:04,752 INFO L225 Difference]: With dead ends: 182 [2020-10-28 09:01:04,752 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 09:01:04,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:01:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 09:01:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-28 09:01:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 09:01:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-28 09:01:04,762 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 97 [2020-10-28 09:01:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:04,763 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-28 09:01:04,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:01:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-28 09:01:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:01:04,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:04,764 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:04,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:01:04,765 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash 976743850, now seen corresponding path program 20 times [2020-10-28 09:01:04,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:04,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860556840] [2020-10-28 09:01:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:04,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:01:09,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:01:09,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:01:09,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:10,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:10,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-28 09:01:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860556840] [2020-10-28 09:01:10,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:10,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:01:10,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712050564] [2020-10-28 09:01:10,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:01:10,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:01:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:01:10,201 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 24 states. [2020-10-28 09:01:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:10,527 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-10-28 09:01:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:01:10,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2020-10-28 09:01:10,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:10,531 INFO L225 Difference]: With dead ends: 189 [2020-10-28 09:01:10,532 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 09:01:10,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:01:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 09:01:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-28 09:01:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 09:01:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-28 09:01:10,538 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 101 [2020-10-28 09:01:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:10,539 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-28 09:01:10,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:01:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-28 09:01:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 09:01:10,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:10,540 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:10,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:01:10,541 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1518146840, now seen corresponding path program 21 times [2020-10-28 09:01:10,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:10,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865180488] [2020-10-28 09:01:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:10,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:10,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:15,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:15,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:01:15,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:16,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:16,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:16,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:16,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:16,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-10-28 09:01:16,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865180488] [2020-10-28 09:01:16,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:16,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:01:16,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237494239] [2020-10-28 09:01:16,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:01:16,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:01:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:01:16,048 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 25 states. [2020-10-28 09:01:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:16,396 INFO L93 Difference]: Finished difference Result 196 states and 207 transitions. [2020-10-28 09:01:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:01:16,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2020-10-28 09:01:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:16,397 INFO L225 Difference]: With dead ends: 196 [2020-10-28 09:01:16,397 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 09:01:16,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:01:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 09:01:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-28 09:01:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:01:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-28 09:01:16,409 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 105 [2020-10-28 09:01:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:16,410 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-28 09:01:16,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:01:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-28 09:01:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:01:16,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:16,412 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:16,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:01:16,413 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash 856589034, now seen corresponding path program 22 times [2020-10-28 09:01:16,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:16,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058214703] [2020-10-28 09:01:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:16,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:16,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:21,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:21,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:01:21,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:21,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:01:21,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:21,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:01:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:01:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:01:21,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:21,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:21,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:21,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:21,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2020-10-28 09:01:21,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058214703] [2020-10-28 09:01:21,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:21,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:01:21,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119229010] [2020-10-28 09:01:21,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:01:21,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:21,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:01:21,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:01:21,910 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 26 states. [2020-10-28 09:01:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:22,303 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-10-28 09:01:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:01:22,303 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 109 [2020-10-28 09:01:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:22,305 INFO L225 Difference]: With dead ends: 203 [2020-10-28 09:01:22,305 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 09:01:22,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:01:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 09:01:22,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-28 09:01:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 09:01:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-28 09:01:22,312 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 109 [2020-10-28 09:01:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:22,312 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-28 09:01:22,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:01:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-28 09:01:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 09:01:22,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:22,313 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:22,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:01:22,314 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1037813464, now seen corresponding path program 23 times [2020-10-28 09:01:22,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:22,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821347144] [2020-10-28 09:01:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:22,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:22,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:22,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:27,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:01:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:27,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:27,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:27,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:27,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:27,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2020-10-28 09:01:27,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821347144] [2020-10-28 09:01:27,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:27,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:01:27,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030611584] [2020-10-28 09:01:27,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:01:27,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:27,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:01:27,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:01:27,872 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 27 states. [2020-10-28 09:01:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:28,272 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2020-10-28 09:01:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:01:28,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2020-10-28 09:01:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:28,274 INFO L225 Difference]: With dead ends: 210 [2020-10-28 09:01:28,274 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 09:01:28,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:01:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 09:01:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-28 09:01:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 09:01:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-28 09:01:28,282 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 113 [2020-10-28 09:01:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:28,282 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-28 09:01:28,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:01:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-28 09:01:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 09:01:28,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:28,283 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:28,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:01:28,284 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:28,284 INFO L82 PathProgramCache]: Analyzing trace with hash -292124630, now seen corresponding path program 24 times [2020-10-28 09:01:28,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:28,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873604639] [2020-10-28 09:01:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:28,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:28,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:33,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:01:33,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:33,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:33,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:33,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:33,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:33,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:33,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-28 09:01:33,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873604639] [2020-10-28 09:01:33,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:33,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:01:33,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653245516] [2020-10-28 09:01:33,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:01:33,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:01:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:01:33,872 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 28 states. [2020-10-28 09:01:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:34,219 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2020-10-28 09:01:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:01:34,219 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2020-10-28 09:01:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:34,220 INFO L225 Difference]: With dead ends: 217 [2020-10-28 09:01:34,220 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 09:01:34,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:01:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 09:01:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 09:01:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 09:01:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-28 09:01:34,229 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 117 [2020-10-28 09:01:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:34,229 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-28 09:01:34,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:01:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-28 09:01:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:01:34,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:34,231 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:34,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:01:34,231 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash 789600104, now seen corresponding path program 25 times [2020-10-28 09:01:34,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:34,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324521702] [2020-10-28 09:01:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:34,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:34,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:34,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:39,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:01:39,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:39,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:39,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:39,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:39,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:39,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:39,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:39,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:39,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:39,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-28 09:01:39,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324521702] [2020-10-28 09:01:39,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:39,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:01:39,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502284398] [2020-10-28 09:01:39,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:01:39,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:39,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:01:39,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:01:39,867 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 29 states. [2020-10-28 09:01:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:40,281 INFO L93 Difference]: Finished difference Result 224 states and 235 transitions. [2020-10-28 09:01:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:01:40,282 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 121 [2020-10-28 09:01:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:40,283 INFO L225 Difference]: With dead ends: 224 [2020-10-28 09:01:40,283 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 09:01:40,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:01:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 09:01:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-28 09:01:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 09:01:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-28 09:01:40,291 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 121 [2020-10-28 09:01:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:40,291 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-28 09:01:40,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:01:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-28 09:01:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:01:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:40,293 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:40,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:01:40,293 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:40,294 INFO L82 PathProgramCache]: Analyzing trace with hash -771228310, now seen corresponding path program 26 times [2020-10-28 09:01:40,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:40,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329234621] [2020-10-28 09:01:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:40,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:40,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:40,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:45,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:01:45,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:45,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:45,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:45,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:45,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:45,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:45,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:45,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:45,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2020-10-28 09:01:45,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329234621] [2020-10-28 09:01:45,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:45,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:01:45,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268907541] [2020-10-28 09:01:45,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:01:45,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:45,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:01:45,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:45,959 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 30 states. [2020-10-28 09:01:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:46,350 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2020-10-28 09:01:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:01:46,350 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 125 [2020-10-28 09:01:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:46,352 INFO L225 Difference]: With dead ends: 231 [2020-10-28 09:01:46,352 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 09:01:46,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 09:01:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-28 09:01:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 09:01:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-28 09:01:46,360 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2020-10-28 09:01:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:46,360 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-28 09:01:46,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:01:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-28 09:01:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 09:01:46,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:46,362 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:46,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:01:46,362 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:46,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1047479720, now seen corresponding path program 27 times [2020-10-28 09:01:46,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:46,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607873293] [2020-10-28 09:01:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:46,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:51,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 09:01:51,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:51,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:01:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:51,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:01:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 09:01:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:01:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:52,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:52,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:52,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:52,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:52,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:52,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:52,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:52,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:52,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:52,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:52,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:52,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-10-28 09:01:52,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607873293] [2020-10-28 09:01:52,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:52,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:01:52,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014675380] [2020-10-28 09:01:52,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:01:52,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:52,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:01:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:01:52,053 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 31 states. [2020-10-28 09:01:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:52,428 INFO L93 Difference]: Finished difference Result 238 states and 249 transitions. [2020-10-28 09:01:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:01:52,428 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 129 [2020-10-28 09:01:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:52,429 INFO L225 Difference]: With dead ends: 238 [2020-10-28 09:01:52,429 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:01:52,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:01:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:01:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-28 09:01:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 09:01:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-28 09:01:52,440 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 129 [2020-10-28 09:01:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:52,440 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-28 09:01:52,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:01:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-28 09:01:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 09:01:52,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:52,443 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:52,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:01:52,443 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:52,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1550130518, now seen corresponding path program 28 times [2020-10-28 09:01:52,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:52,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531218175] [2020-10-28 09:01:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:52,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:57,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:57,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 09:01:57,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:01:57,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:57,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:57,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:01:57,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 09:01:57,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:01:57,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:01:58,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:58,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:58,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:58,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:58,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:58,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:58,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:58,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:58,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:58,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:58,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2020-10-28 09:01:58,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531218175] [2020-10-28 09:01:58,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:58,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:01:58,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525197780] [2020-10-28 09:01:58,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:01:58,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:58,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:01:58,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:58,321 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 32 states. [2020-10-28 09:01:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:58,796 INFO L93 Difference]: Finished difference Result 245 states and 256 transitions. [2020-10-28 09:01:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:01:58,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 133 [2020-10-28 09:01:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:58,798 INFO L225 Difference]: With dead ends: 245 [2020-10-28 09:01:58,798 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 09:01:58,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 09:01:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-28 09:01:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 09:01:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-28 09:01:58,805 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 133 [2020-10-28 09:01:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:58,805 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-28 09:01:58,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:01:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-28 09:01:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 09:01:58,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:58,807 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:58,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:01:58,807 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash 828965864, now seen corresponding path program 29 times [2020-10-28 09:01:58,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:58,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6729377] [2020-10-28 09:01:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:58,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:59,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:59,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:03,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:03,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 09:02:03,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:03,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 09:02:03,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:03,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:02:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 09:02:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:02:03,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:04,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:04,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:04,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:04,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:04,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:04,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:04,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:04,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:04,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:04,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:04,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2020-10-28 09:02:04,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6729377] [2020-10-28 09:02:04,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:04,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:02:04,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215836340] [2020-10-28 09:02:04,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:02:04,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:02:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:02:04,708 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 33 states. [2020-10-28 09:02:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:05,194 INFO L93 Difference]: Finished difference Result 252 states and 263 transitions. [2020-10-28 09:02:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:02:05,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 137 [2020-10-28 09:02:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:05,195 INFO L225 Difference]: With dead ends: 252 [2020-10-28 09:02:05,196 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 09:02:05,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:02:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 09:02:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-28 09:02:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-28 09:02:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-28 09:02:05,203 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2020-10-28 09:02:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:05,203 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-28 09:02:05,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:02:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-28 09:02:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 09:02:05,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:05,204 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:05,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:02:05,205 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash 176633834, now seen corresponding path program 30 times [2020-10-28 09:02:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:05,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269816644] [2020-10-28 09:02:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:05,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:05,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:10,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:10,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 09:02:10,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:10,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:02:10,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:10,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:02:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:02:10,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:10,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:10,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:10,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:10,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:10,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:10,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:10,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:10,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:10,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-10-28 09:02:10,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269816644] [2020-10-28 09:02:10,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:10,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:02:10,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086673585] [2020-10-28 09:02:10,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:02:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:02:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:02:10,996 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 34 states. [2020-10-28 09:02:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:11,461 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2020-10-28 09:02:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:02:11,461 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 141 [2020-10-28 09:02:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:11,463 INFO L225 Difference]: With dead ends: 259 [2020-10-28 09:02:11,463 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 09:02:11,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:02:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 09:02:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-28 09:02:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 09:02:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-10-28 09:02:11,476 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2020-10-28 09:02:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:11,477 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-10-28 09:02:11,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:02:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-10-28 09:02:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 09:02:11,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:11,478 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:11,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:02:11,478 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:11,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1205497304, now seen corresponding path program 31 times [2020-10-28 09:02:11,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:11,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991919149] [2020-10-28 09:02:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:11,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:16,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:16,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:02:16,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:17,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:17,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:17,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:17,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:17,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:17,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:17,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:17,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2020-10-28 09:02:17,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991919149] [2020-10-28 09:02:17,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:17,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:02:17,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313638442] [2020-10-28 09:02:17,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:02:17,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:02:17,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:02:17,481 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 35 states. [2020-10-28 09:02:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:17,898 INFO L93 Difference]: Finished difference Result 266 states and 277 transitions. [2020-10-28 09:02:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:02:17,899 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-28 09:02:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:17,900 INFO L225 Difference]: With dead ends: 266 [2020-10-28 09:02:17,900 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 09:02:17,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:02:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 09:02:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-28 09:02:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 09:02:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-10-28 09:02:17,911 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 145 [2020-10-28 09:02:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:17,911 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-10-28 09:02:17,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:02:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-10-28 09:02:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 09:02:17,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:17,912 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:17,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:02:17,912 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash 251985194, now seen corresponding path program 32 times [2020-10-28 09:02:17,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:17,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133681082] [2020-10-28 09:02:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:17,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:18,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:18,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:22,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:22,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 09:02:22,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:22,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:02:22,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:22,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:22,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:02:22,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:02:22,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:02:22,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:23,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:23,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:23,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:23,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:23,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:23,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:23,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2020-10-28 09:02:23,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133681082] [2020-10-28 09:02:23,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:23,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:02:23,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579454763] [2020-10-28 09:02:23,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:02:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:02:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:02:23,814 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 36 states. [2020-10-28 09:02:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:24,296 INFO L93 Difference]: Finished difference Result 273 states and 284 transitions. [2020-10-28 09:02:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:02:24,297 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 149 [2020-10-28 09:02:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:24,298 INFO L225 Difference]: With dead ends: 273 [2020-10-28 09:02:24,298 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 09:02:24,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:02:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 09:02:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-28 09:02:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 09:02:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2020-10-28 09:02:24,306 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 149 [2020-10-28 09:02:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:24,307 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2020-10-28 09:02:24,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:02:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2020-10-28 09:02:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 09:02:24,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:24,308 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:24,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:02:24,308 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:24,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1909256296, now seen corresponding path program 33 times [2020-10-28 09:02:24,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:24,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899373349] [2020-10-28 09:02:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:24,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:24,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:24,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:29,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:02:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:30,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-10-28 09:02:30,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899373349] [2020-10-28 09:02:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:02:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411635097] [2020-10-28 09:02:30,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:02:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:02:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:02:30,310 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 37 states. [2020-10-28 09:02:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:30,879 INFO L93 Difference]: Finished difference Result 280 states and 291 transitions. [2020-10-28 09:02:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:02:30,880 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 153 [2020-10-28 09:02:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:30,882 INFO L225 Difference]: With dead ends: 280 [2020-10-28 09:02:30,882 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 09:02:30,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:02:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 09:02:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-28 09:02:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 09:02:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-28 09:02:30,891 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2020-10-28 09:02:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:30,891 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-28 09:02:30,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:02:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-28 09:02:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 09:02:30,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:30,892 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:30,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:02:30,893 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1706282390, now seen corresponding path program 34 times [2020-10-28 09:02:30,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:30,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235223164] [2020-10-28 09:02:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:31,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:31,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:35,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:02:35,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:36,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:36,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:36,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:36,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:36,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:36,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:36,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2020-10-28 09:02:36,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235223164] [2020-10-28 09:02:36,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:36,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:02:36,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770394633] [2020-10-28 09:02:36,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:02:36,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:36,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:02:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:02:36,920 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 38 states. [2020-10-28 09:02:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:37,488 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2020-10-28 09:02:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:02:37,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 157 [2020-10-28 09:02:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:37,490 INFO L225 Difference]: With dead ends: 287 [2020-10-28 09:02:37,490 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 09:02:37,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:02:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 09:02:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-28 09:02:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 09:02:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2020-10-28 09:02:37,497 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 157 [2020-10-28 09:02:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:37,498 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2020-10-28 09:02:37,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:02:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2020-10-28 09:02:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 09:02:37,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:37,499 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:37,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:02:37,501 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1820794536, now seen corresponding path program 35 times [2020-10-28 09:02:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:37,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013666962] [2020-10-28 09:02:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:37,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:42,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:42,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 09:02:42,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:42,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 09:02:42,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:42,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:02:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 09:02:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:02:42,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:43,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:43,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:43,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-28 09:02:43,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013666962] [2020-10-28 09:02:43,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:43,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:02:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516113024] [2020-10-28 09:02:43,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:02:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:43,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:02:43,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:43,581 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 39 states. [2020-10-28 09:02:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:44,178 INFO L93 Difference]: Finished difference Result 294 states and 305 transitions. [2020-10-28 09:02:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:02:44,179 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 161 [2020-10-28 09:02:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:44,180 INFO L225 Difference]: With dead ends: 294 [2020-10-28 09:02:44,180 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 09:02:44,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 09:02:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-28 09:02:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 09:02:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-10-28 09:02:44,190 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2020-10-28 09:02:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:44,190 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-10-28 09:02:44,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:02:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-10-28 09:02:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 09:02:44,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:44,191 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:44,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:02:44,191 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash -158017622, now seen corresponding path program 36 times [2020-10-28 09:02:44,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:44,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576308042] [2020-10-28 09:02:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:44,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:44,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:44,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:49,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 09:02:49,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:49,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:02:49,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:49,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:49,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:02:49,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 09:02:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:02:49,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:50,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:50,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:50,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:50,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2020-10-28 09:02:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576308042] [2020-10-28 09:02:50,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:50,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:02:50,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324755628] [2020-10-28 09:02:50,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:02:50,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:02:50,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:02:50,308 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 40 states. [2020-10-28 09:02:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:50,939 INFO L93 Difference]: Finished difference Result 301 states and 312 transitions. [2020-10-28 09:02:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:02:50,940 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2020-10-28 09:02:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:50,941 INFO L225 Difference]: With dead ends: 301 [2020-10-28 09:02:50,941 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 09:02:50,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:02:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 09:02:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-28 09:02:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:02:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2020-10-28 09:02:50,949 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2020-10-28 09:02:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:50,950 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2020-10-28 09:02:50,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:02:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2020-10-28 09:02:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 09:02:50,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:50,951 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:50,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:02:50,951 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1518592792, now seen corresponding path program 37 times [2020-10-28 09:02:50,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:50,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926856035] [2020-10-28 09:02:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:56,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 09:02:56,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:57,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:57,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:57,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:57,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:57,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:57,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:57,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:57,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:57,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2020-10-28 09:02:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926856035] [2020-10-28 09:02:57,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:57,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:02:57,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169484345] [2020-10-28 09:02:57,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:02:57,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:57,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:02:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:02:57,124 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 41 states. [2020-10-28 09:02:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:57,750 INFO L93 Difference]: Finished difference Result 308 states and 319 transitions. [2020-10-28 09:02:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:02:57,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 169 [2020-10-28 09:02:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:57,752 INFO L225 Difference]: With dead ends: 308 [2020-10-28 09:02:57,752 INFO L226 Difference]: Without dead ends: 178 [2020-10-28 09:02:57,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:02:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-28 09:02:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-28 09:02:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 09:02:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-10-28 09:02:57,761 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2020-10-28 09:02:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:57,761 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-10-28 09:02:57,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:02:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-10-28 09:02:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 09:02:57,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:57,763 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:57,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:02:57,763 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1326902506, now seen corresponding path program 38 times [2020-10-28 09:02:57,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:57,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429697543] [2020-10-28 09:02:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:02,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:03:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:03,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:03,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:03,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:03,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:03,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:03,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2223 trivial. 0 not checked. [2020-10-28 09:03:03,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429697543] [2020-10-28 09:03:03,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:03,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 09:03:03,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23905176] [2020-10-28 09:03:03,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 09:03:03,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:03,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 09:03:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:03:03,973 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 42 states. [2020-10-28 09:03:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:04,611 INFO L93 Difference]: Finished difference Result 315 states and 326 transitions. [2020-10-28 09:03:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 09:03:04,611 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 173 [2020-10-28 09:03:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:04,613 INFO L225 Difference]: With dead ends: 315 [2020-10-28 09:03:04,613 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 09:03:04,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:03:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 09:03:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-28 09:03:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 09:03:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-10-28 09:03:04,620 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 173 [2020-10-28 09:03:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:04,620 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-10-28 09:03:04,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 09:03:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-10-28 09:03:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-28 09:03:04,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:04,622 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:04,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:03:04,622 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1999377624, now seen corresponding path program 39 times [2020-10-28 09:03:04,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:04,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587347265] [2020-10-28 09:03:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:04,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:05,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:09,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:03:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:10,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:10,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:10,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:10,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:10,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:10,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:10,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:10,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:10,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:10,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:10,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:10,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2020-10-28 09:03:10,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587347265] [2020-10-28 09:03:10,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:10,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 09:03:10,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062600043] [2020-10-28 09:03:10,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 09:03:10,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 09:03:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:03:10,919 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 43 states. [2020-10-28 09:03:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:11,546 INFO L93 Difference]: Finished difference Result 322 states and 333 transitions. [2020-10-28 09:03:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:03:11,547 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 177 [2020-10-28 09:03:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:11,549 INFO L225 Difference]: With dead ends: 322 [2020-10-28 09:03:11,549 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 09:03:11,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:03:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 09:03:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-28 09:03:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 09:03:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-10-28 09:03:11,558 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 177 [2020-10-28 09:03:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:11,558 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-10-28 09:03:11,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 09:03:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-10-28 09:03:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 09:03:11,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:11,559 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:11,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:03:11,560 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:11,560 INFO L82 PathProgramCache]: Analyzing trace with hash 805990954, now seen corresponding path program 40 times [2020-10-28 09:03:11,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:11,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645398345] [2020-10-28 09:03:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:11,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:11,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:12,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:16,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:03:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:17,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:17,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:17,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2020-10-28 09:03:17,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645398345] [2020-10-28 09:03:17,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:17,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 09:03:17,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672158302] [2020-10-28 09:03:17,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 09:03:17,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 09:03:17,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:03:17,910 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 44 states. [2020-10-28 09:03:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:18,550 INFO L93 Difference]: Finished difference Result 329 states and 340 transitions. [2020-10-28 09:03:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 09:03:18,551 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 181 [2020-10-28 09:03:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:18,552 INFO L225 Difference]: With dead ends: 329 [2020-10-28 09:03:18,553 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 09:03:18,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:03:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 09:03:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-28 09:03:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-28 09:03:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-10-28 09:03:18,561 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 181 [2020-10-28 09:03:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:18,561 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-10-28 09:03:18,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 09:03:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-10-28 09:03:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-28 09:03:18,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:18,562 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:18,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:03:18,563 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:18,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1907788136, now seen corresponding path program 41 times [2020-10-28 09:03:18,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:18,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078247002] [2020-10-28 09:03:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:18,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking...