/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_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:58:46,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:58:46,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:58:46,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:58:46,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:58:46,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:58:46,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:58:46,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:58:46,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:58:46,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:58:46,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:58:46,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:58:46,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:58:46,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:58:46,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:58:46,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:58:46,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:58:46,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:58:46,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:58:46,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:58:46,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:58:46,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:58:46,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:58:46,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:58:46,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:58:46,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:58:46,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:58:46,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:58:46,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:58:46,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:58:46,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:58:46,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:58:46,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:58:46,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:58:46,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:58:46,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:58:46,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:58:46,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:58:46,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:58:46,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:58:46,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:58:46,749 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 08:58:46,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:58:46,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:58:46,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:58:46,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:58:46,779 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:58:46,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:58:46,780 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:58:46,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:58:46,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:58:46,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:58:46,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:58:46,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:58:46,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:58:46,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:58:46,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:58:46,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:58:46,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:58:46,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:58:46,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:58:46,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:58:46,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:58:46,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:58:46,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:58:46,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:58:46,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:58:46,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:58:46,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:58:46,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:58:46,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:58:46,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:58:47,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:58:47,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:58:47,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:58:47,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:58:47,210 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:58:47,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-28 08:58:47,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cdf3e21e/f60a80daac894915a8ed13affb949f12/FLAGc6d1b8b0f [2020-10-28 08:58:47,976 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:58:47,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-28 08:58:47,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cdf3e21e/f60a80daac894915a8ed13affb949f12/FLAGc6d1b8b0f [2020-10-28 08:58:48,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cdf3e21e/f60a80daac894915a8ed13affb949f12 [2020-10-28 08:58:48,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:58:48,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:58:48,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:48,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:58:48,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:58:48,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56597449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48, skipping insertion in model container [2020-10-28 08:58:48,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:58:48,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:58:48,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:48,715 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:58:48,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:48,763 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:58:48,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48 WrapperNode [2020-10-28 08:58:48,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:48,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:58:48,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:58:48,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:58:48,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (1/1) ... [2020-10-28 08:58:48,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:58:48,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:58:48,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:58:48,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:58:48,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (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 08:58:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:58:48,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:58:48,892 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:58:48,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:58:48,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:58:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:58:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:58:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:58:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:58:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:58:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:58:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:58:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:58:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:58:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:58:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:58:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:58:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:58:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:58:49,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:58:49,374 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 08:58:49,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:49 BoogieIcfgContainer [2020-10-28 08:58:49,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:58:49,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:58:49,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:58:49,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:58:49,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:58:48" (1/3) ... [2020-10-28 08:58:49,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d9ac88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:49, skipping insertion in model container [2020-10-28 08:58:49,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:48" (2/3) ... [2020-10-28 08:58:49,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d9ac88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:49, skipping insertion in model container [2020-10-28 08:58:49,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:49" (3/3) ... [2020-10-28 08:58:49,386 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2020-10-28 08:58:49,401 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:58:49,406 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:58:49,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:58:49,449 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:58:49,449 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:58:49,450 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:58:49,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:58:49,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:58:49,450 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:58:49,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:58:49,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:58:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-28 08:58:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:58:49,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:49,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:49,499 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1280200698, now seen corresponding path program 1 times [2020-10-28 08:58:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:49,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81266616] [2020-10-28 08:58:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:49,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:50,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:58:50,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:50,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-28 08:58:50,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:50,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:58:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:58:50,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:50,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:50,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:58:50,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:50,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:50,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:50,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:50,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81266616] [2020-10-28 08:58:50,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:58:50,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:58:50,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808075389] [2020-10-28 08:58:50,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:58:50,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:50,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:58:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:58:50,245 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-28 08:58:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:50,373 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-28 08:58:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:58:50,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-28 08:58:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:50,384 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:58:50,384 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 08:58:50,388 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 08:58:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 08:58:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 08:58:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 08:58:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 08:58:50,432 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2020-10-28 08:58:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:50,432 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 08:58:50,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:58:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 08:58:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:58:50,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:50,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:50,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:58:50,435 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -121928458, now seen corresponding path program 1 times [2020-10-28 08:58:50,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:50,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614952851] [2020-10-28 08:58:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:50,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:58:50,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:50,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-28 08:58:50,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:50,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:58:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:58:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:58:50,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:50,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:50,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:50,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:50,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:58:50,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:50,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:50,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:50,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:50,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:50,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:50,751 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 08:58:50,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614952851] [2020-10-28 08:58:50,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:58:50,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:58:50,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522161033] [2020-10-28 08:58:50,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:58:50,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:58:50,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:58:50,756 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-28 08:58:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:50,905 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-28 08:58:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:58:50,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 08:58:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:50,907 INFO L225 Difference]: With dead ends: 44 [2020-10-28 08:58:50,907 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 08:58:50,909 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 08:58:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 08:58:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 08:58:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:58:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 08:58:50,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-10-28 08:58:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:50,919 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 08:58:50,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:58:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 08:58:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 08:58:50,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:50,920 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] [2020-10-28 08:58:50,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:58:50,921 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:50,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1629215179, now seen corresponding path program 1 times [2020-10-28 08:58:50,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:50,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975746516] [2020-10-28 08:58:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:51,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:51,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:51,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 08:58:51,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:51,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-28 08:58:51,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:51,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:51,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:58:51,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:51,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:58:51,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:51,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:51,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:51,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:51,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:51,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:58:51,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:51,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:51,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 08:58:51,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975746516] [2020-10-28 08:58:51,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:51,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:58:51,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193174591] [2020-10-28 08:58:51,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:58:51,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:58:51,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:58:51,982 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-28 08:58:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:52,137 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-28 08:58:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:58:52,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 08:58:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:52,139 INFO L225 Difference]: With dead ends: 49 [2020-10-28 08:58:52,140 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:58:52,140 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 08:58:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:58:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 08:58:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:58:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-28 08:58:52,149 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-10-28 08:58:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:52,149 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-28 08:58:52,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:58:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-28 08:58:52,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:58:52,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:52,151 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:52,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:58:52,151 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1446473942, now seen corresponding path program 2 times [2020-10-28 08:58:52,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:52,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563833952] [2020-10-28 08:58:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:52,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:53,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:53,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:58:53,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1773 [2020-10-28 08:58:53,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:53,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:53,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:58:53,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:53,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:58:53,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:54,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:54,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:54,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:54,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:54,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:54,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:54,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:54,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:54,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:54,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:54,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:58:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563833952] [2020-10-28 08:58:54,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:54,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:58:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131020376] [2020-10-28 08:58:54,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:58:54,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:58:54,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:58:54,043 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-10-28 08:58:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:54,242 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-28 08:58:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:58:54,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 08:58:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:54,244 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:58:54,244 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:58:54,245 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 08:58:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:58:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 08:58:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 08:58:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 08:58:54,253 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2020-10-28 08:58:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:54,253 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 08:58:54,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:58:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 08:58:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:58:54,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:54,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:54,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:58:54,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash -120934037, now seen corresponding path program 3 times [2020-10-28 08:58:54,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:54,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987871026] [2020-10-28 08:58:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:54,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:54,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:57,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:58:57,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:57,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3007 [2020-10-28 08:58:57,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:57,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:57,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:58:57,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:58:57,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:58:57,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:57,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:57,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:57,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:57,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:57,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:57,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:57,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:58:57,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987871026] [2020-10-28 08:58:57,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:57,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:58:57,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596055567] [2020-10-28 08:58:57,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:58:57,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:58:57,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:58:57,406 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-10-28 08:58:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:57,575 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-10-28 08:58:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:58:57,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-28 08:58:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:57,577 INFO L225 Difference]: With dead ends: 59 [2020-10-28 08:58:57,578 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:58:57,578 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 08:58:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:58:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 08:58:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:58:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-28 08:58:57,585 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2020-10-28 08:58:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:57,586 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-28 08:58:57,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:58:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-28 08:58:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:58:57,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:57,587 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:57,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:58:57,588 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:57,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1197681482, now seen corresponding path program 4 times [2020-10-28 08:58:57,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:57,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458807846] [2020-10-28 08:58:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:57,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:02,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:02,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:59:02,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:02,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:59:02,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:02,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:02,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:59:02,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:59:02,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:59:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:59:02,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:02,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:02,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:02,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:02,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:02,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:02,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:02,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:02,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 08:59:02,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458807846] [2020-10-28 08:59:02,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:02,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:59:02,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698493] [2020-10-28 08:59:02,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:59:02,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:02,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:59:02,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:59:02,762 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-10-28 08:59:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:02,920 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-28 08:59:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:59:02,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 08:59:02,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:02,921 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:59:02,922 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:59:02,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:59:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:59:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 08:59:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 08:59:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-28 08:59:02,930 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2020-10-28 08:59:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:02,930 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-28 08:59:02,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:59:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-28 08:59:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 08:59:02,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:02,931 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:02,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:59:02,932 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash 46878987, now seen corresponding path program 5 times [2020-10-28 08:59:02,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:02,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516526952] [2020-10-28 08:59:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:02,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:02,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:07,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:07,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 08:59:07,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:07,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:59:07,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:07,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:07,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:59:07,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:59:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:59:07,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:08,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:08,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:08,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:08,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:08,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:08,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:08,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:08,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 08:59:08,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516526952] [2020-10-28 08:59:08,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:08,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:59:08,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768628998] [2020-10-28 08:59:08,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:59:08,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:08,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:59:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:59:08,112 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2020-10-28 08:59:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:08,332 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-10-28 08:59:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:59:08,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 08:59:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:08,334 INFO L225 Difference]: With dead ends: 69 [2020-10-28 08:59:08,334 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:59:08,335 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 08:59:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:59:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:59:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:59:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-28 08:59:08,346 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2020-10-28 08:59:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:08,347 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-28 08:59:08,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:59:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-28 08:59:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 08:59:08,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:08,348 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:08,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:59:08,349 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash 595439766, now seen corresponding path program 6 times [2020-10-28 08:59:08,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:08,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33725989] [2020-10-28 08:59:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:08,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:09,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:13,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:13,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 08:59:13,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:13,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:59:13,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:13,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:59:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:59:13,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:59:13,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:13,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:13,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:13,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:13,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:13,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:13,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:13,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:13,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 08:59:13,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33725989] [2020-10-28 08:59:13,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:13,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:59:13,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385995874] [2020-10-28 08:59:13,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:59:13,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:13,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:59:13,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:13,508 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 10 states. [2020-10-28 08:59:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:13,629 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-28 08:59:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:59:13,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 08:59:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:13,631 INFO L225 Difference]: With dead ends: 74 [2020-10-28 08:59:13,631 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:59:13,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:59:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 08:59:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:59:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-28 08:59:13,641 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 37 [2020-10-28 08:59:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:13,642 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-28 08:59:13,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:59:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-28 08:59:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 08:59:13,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:13,643 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:13,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:59:13,643 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:13,644 INFO L82 PathProgramCache]: Analyzing trace with hash -525616981, now seen corresponding path program 7 times [2020-10-28 08:59:13,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:13,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322522974] [2020-10-28 08:59:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:13,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:13,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:18,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:18,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 08:59:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:18,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:18,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:18,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:18,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:18,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:18,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:18,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:18,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:18,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:18,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:18,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 08:59:18,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322522974] [2020-10-28 08:59:18,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:18,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:59:18,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852450134] [2020-10-28 08:59:18,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:59:18,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:18,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:59:18,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:59:18,831 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 11 states. [2020-10-28 08:59:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:19,016 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2020-10-28 08:59:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:59:19,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-28 08:59:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:19,018 INFO L225 Difference]: With dead ends: 79 [2020-10-28 08:59:19,018 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 08:59:19,019 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 08:59:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 08:59:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 08:59:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:59:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-28 08:59:19,025 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 40 [2020-10-28 08:59:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:19,025 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-28 08:59:19,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:59:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-28 08:59:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:59:19,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:19,027 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:19,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:59:19,027 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1340867702, now seen corresponding path program 8 times [2020-10-28 08:59:19,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:19,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518048692] [2020-10-28 08:59:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:19,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:24,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:59:24,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:24,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:24,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:24,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 08:59:24,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518048692] [2020-10-28 08:59:24,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:24,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:59:24,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179960098] [2020-10-28 08:59:24,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:59:24,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:59:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:59:24,226 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 12 states. [2020-10-28 08:59:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:24,427 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-28 08:59:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:59:24,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 08:59:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:24,428 INFO L225 Difference]: With dead ends: 84 [2020-10-28 08:59:24,428 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:59:24,431 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 08:59:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:59:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 08:59:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 08:59:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-28 08:59:24,443 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 43 [2020-10-28 08:59:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:24,446 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-28 08:59:24,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:59:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-28 08:59:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 08:59:24,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:24,448 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:24,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:59:24,449 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:24,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1048176715, now seen corresponding path program 9 times [2020-10-28 08:59:24,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:24,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601320652] [2020-10-28 08:59:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:24,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:29,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:29,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 08:59:29,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:29,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:59:29,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:29,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:59:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:59:29,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:29,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:29,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:29,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:29,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:29,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:29,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:29,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:29,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:29,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:29,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:29,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:29,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 08:59:29,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601320652] [2020-10-28 08:59:29,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:29,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:59:29,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389876904] [2020-10-28 08:59:29,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:59:29,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:29,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:59:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:59:29,649 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 13 states. [2020-10-28 08:59:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:29,787 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-28 08:59:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:59:29,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-28 08:59:29,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:29,789 INFO L225 Difference]: With dead ends: 89 [2020-10-28 08:59:29,789 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 08:59:29,792 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 08:59:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 08:59:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 08:59:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:59:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-28 08:59:29,805 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2020-10-28 08:59:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:29,806 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-28 08:59:29,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:59:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-28 08:59:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:59:29,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:29,807 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:29,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:59:29,809 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:29,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:29,810 INFO L82 PathProgramCache]: Analyzing trace with hash -864432042, now seen corresponding path program 10 times [2020-10-28 08:59:29,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:29,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532047997] [2020-10-28 08:59:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:29,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:29,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:29,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:32,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:34,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:34,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:59:34,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:34,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:59:34,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:34,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:59:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:59:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:34,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:34,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:34,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:34,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:34,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:34,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:34,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:34,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:34,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:34,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:34,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:34,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 08:59:35,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532047997] [2020-10-28 08:59:35,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:35,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:59:35,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373667003] [2020-10-28 08:59:35,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:59:35,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:35,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:59:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:59:35,004 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 14 states. [2020-10-28 08:59:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:35,155 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-28 08:59:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:59:35,156 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 08:59:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:35,157 INFO L225 Difference]: With dead ends: 94 [2020-10-28 08:59:35,157 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:59:35,158 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 08:59:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:59:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 08:59:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 08:59:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-28 08:59:35,168 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 49 [2020-10-28 08:59:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:35,168 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-28 08:59:35,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:59:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-28 08:59:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 08:59:35,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:35,173 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:35,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:59:35,174 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:35,174 INFO L82 PathProgramCache]: Analyzing trace with hash -222044181, now seen corresponding path program 11 times [2020-10-28 08:59:35,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:35,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180695068] [2020-10-28 08:59:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:35,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:35,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:59:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 08:59:40,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:40,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:40,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:40,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:40,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:40,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 08:59:40,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180695068] [2020-10-28 08:59:40,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:40,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:59:40,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101091941] [2020-10-28 08:59:40,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:59:40,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:59:40,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:59:40,425 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 15 states. [2020-10-28 08:59:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:40,629 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-10-28 08:59:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:59:40,629 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-28 08:59:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:40,630 INFO L225 Difference]: With dead ends: 99 [2020-10-28 08:59:40,630 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 08:59:40,631 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 08:59:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 08:59:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 08:59:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:59:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-28 08:59:40,638 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 52 [2020-10-28 08:59:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:40,638 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-28 08:59:40,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:59:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-28 08:59:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:59:40,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:40,639 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:40,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:59:40,639 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash 490279990, now seen corresponding path program 12 times [2020-10-28 08:59:40,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:40,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372892645] [2020-10-28 08:59:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:40,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:40,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:40,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:45,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:59:45,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:45,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:45,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:45,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:45,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:45,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:45,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:45,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:45,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:45,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:45,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:45,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:45,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-28 08:59:45,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372892645] [2020-10-28 08:59:45,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:45,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:59:45,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756462020] [2020-10-28 08:59:45,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:59:45,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:45,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:59:45,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:59:45,876 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 16 states. [2020-10-28 08:59:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:46,093 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-28 08:59:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:59:46,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-28 08:59:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:46,094 INFO L225 Difference]: With dead ends: 104 [2020-10-28 08:59:46,094 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:59:46,097 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 08:59:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:59:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 08:59:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 08:59:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-28 08:59:46,104 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 55 [2020-10-28 08:59:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:46,104 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-28 08:59:46,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:59:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-28 08:59:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 08:59:46,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:46,106 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:46,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:59:46,106 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash -560488565, now seen corresponding path program 13 times [2020-10-28 08:59:46,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:46,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742235647] [2020-10-28 08:59:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:46,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:46,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:51,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:51,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 08:59:51,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:59:51,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:51,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:59:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:59:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 08:59:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:51,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:51,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:51,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:59:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:51,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:51,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-28 08:59:51,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742235647] [2020-10-28 08:59:51,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:51,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:59:51,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157778002] [2020-10-28 08:59:51,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:59:51,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:59:51,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:59:51,425 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 17 states. [2020-10-28 08:59:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:51,719 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2020-10-28 08:59:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:59:51,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-28 08:59:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:51,721 INFO L225 Difference]: With dead ends: 109 [2020-10-28 08:59:51,721 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:59:51,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:59:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:59:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 08:59:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:59:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-28 08:59:51,744 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-10-28 08:59:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:51,744 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-28 08:59:51,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:59:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-28 08:59:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:59:51,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:51,746 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:51,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:59:51,746 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:51,747 INFO L82 PathProgramCache]: Analyzing trace with hash -608448490, now seen corresponding path program 14 times [2020-10-28 08:59:51,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:51,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091325034] [2020-10-28 08:59:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:56,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:59:56,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:57,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:57,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:57,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:57,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:57,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:59:57,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:57,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 08:59:57,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091325034] [2020-10-28 08:59:57,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:57,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:59:57,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805842240] [2020-10-28 08:59:57,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:59:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:57,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:59:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:59:57,050 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 18 states. [2020-10-28 08:59:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:57,288 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-28 08:59:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:59:57,288 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-28 08:59:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:57,290 INFO L225 Difference]: With dead ends: 114 [2020-10-28 08:59:57,290 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 08:59:57,291 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 08:59:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 08:59:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 08:59:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 08:59:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-28 08:59:57,301 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2020-10-28 08:59:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:57,301 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-28 08:59:57,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:59:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-28 08:59:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 08:59:57,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:57,303 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:57,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:59:57,303 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash -847042773, now seen corresponding path program 15 times [2020-10-28 08:59:57,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:57,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073442210] [2020-10-28 08:59:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:57,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:57,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:02,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:02,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:00:02,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:02,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:00:02,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:02,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:02,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:00:02,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:00:02,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:00:02,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:02,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:02,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:02,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:02,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:02,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:02,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:02,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-28 09:00:02,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073442210] [2020-10-28 09:00:02,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:02,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:00:02,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413617825] [2020-10-28 09:00:02,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:00:02,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:00:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:00:02,631 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 19 states. [2020-10-28 09:00:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:02,802 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2020-10-28 09:00:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:00:02,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-10-28 09:00:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:02,804 INFO L225 Difference]: With dead ends: 119 [2020-10-28 09:00:02,804 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:00:02,808 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 09:00:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:00:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 09:00:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:00:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-28 09:00:02,821 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 64 [2020-10-28 09:00:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:02,821 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-28 09:00:02,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:00:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-28 09:00:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:00:02,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:02,823 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:02,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:00:02,823 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:02,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:02,826 INFO L82 PathProgramCache]: Analyzing trace with hash -686554122, now seen corresponding path program 16 times [2020-10-28 09:00:02,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:02,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253228182] [2020-10-28 09:00:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:02,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:07,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:07,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:00:07,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:08,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:08,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:08,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:08,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:08,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:08,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-28 09:00:08,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253228182] [2020-10-28 09:00:08,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:08,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:00:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921519322] [2020-10-28 09:00:08,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:00:08,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:00:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:00:08,162 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 20 states. [2020-10-28 09:00:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:08,404 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-28 09:00:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:00:08,404 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-28 09:00:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:08,405 INFO L225 Difference]: With dead ends: 124 [2020-10-28 09:00:08,405 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 09:00:08,406 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 09:00:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 09:00:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 09:00:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:00:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-28 09:00:08,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 67 [2020-10-28 09:00:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:08,412 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-28 09:00:08,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:00:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-28 09:00:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:00:08,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:08,413 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:08,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:00:08,413 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:08,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1435793099, now seen corresponding path program 17 times [2020-10-28 09:00:08,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:08,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839030236] [2020-10-28 09:00:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:13,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:13,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:00:13,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:13,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:00:13,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:13,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:13,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:00:13,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:13,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:00:13,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:13,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:13,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:13,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:13,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:13,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-28 09:00:13,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839030236] [2020-10-28 09:00:13,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:13,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:00:13,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639756866] [2020-10-28 09:00:13,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:00:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:00:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:13,778 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 21 states. [2020-10-28 09:00:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:14,055 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-10-28 09:00:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:00:14,056 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-28 09:00:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:14,057 INFO L225 Difference]: With dead ends: 129 [2020-10-28 09:00:14,057 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:00:14,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:00:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 09:00:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:00:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-28 09:00:14,063 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 70 [2020-10-28 09:00:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:14,063 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-28 09:00:14,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:00:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-28 09:00:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:00:14,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:14,065 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:14,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:00:14,065 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash 869511126, now seen corresponding path program 18 times [2020-10-28 09:00:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:14,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886690621] [2020-10-28 09:00:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:14,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:14,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:00:19,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:19,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:19,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:19,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:19,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:19,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:19,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-28 09:00:19,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886690621] [2020-10-28 09:00:19,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:19,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:00:19,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448146712] [2020-10-28 09:00:19,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:00:19,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:00:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:00:19,452 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 22 states. [2020-10-28 09:00:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:19,698 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-28 09:00:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:00:19,699 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-10-28 09:00:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:19,700 INFO L225 Difference]: With dead ends: 134 [2020-10-28 09:00:19,700 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:00:19,701 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 09:00:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:00:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 09:00:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:00:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-10-28 09:00:19,707 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 73 [2020-10-28 09:00:19,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:19,708 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-10-28 09:00:19,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:00:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-10-28 09:00:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:00:19,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:19,709 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:19,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:00:19,709 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:19,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1218867605, now seen corresponding path program 19 times [2020-10-28 09:00:19,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:19,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729655801] [2020-10-28 09:00:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:20,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:24,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:24,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:00:24,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:24,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 09:00:24,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:24,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:00:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:00:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:00:24,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:25,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:25,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:25,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-28 09:00:25,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729655801] [2020-10-28 09:00:25,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:25,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:00:25,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521078485] [2020-10-28 09:00:25,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:00:25,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:25,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:00:25,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:00:25,176 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 23 states. [2020-10-28 09:00:25,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:25,482 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2020-10-28 09:00:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:00:25,483 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-10-28 09:00:25,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:25,484 INFO L225 Difference]: With dead ends: 139 [2020-10-28 09:00:25,484 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:00:25,485 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 09:00:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:00:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 09:00:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:00:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-28 09:00:25,493 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2020-10-28 09:00:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:25,494 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-28 09:00:25,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:00:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-28 09:00:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:00:25,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:25,495 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:25,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:00:25,499 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1945316426, now seen corresponding path program 20 times [2020-10-28 09:00:25,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:25,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039834504] [2020-10-28 09:00:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:25,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:25,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:25,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:00:30,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:30,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:30,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:30,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:30,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:30,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:30,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:30,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:30,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:30,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:30,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:30,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:30,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-28 09:00:30,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039834504] [2020-10-28 09:00:30,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:30,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:00:30,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029059024] [2020-10-28 09:00:30,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:00:30,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:00:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:00:30,969 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 24 states. [2020-10-28 09:00:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:31,244 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2020-10-28 09:00:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:00:31,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-10-28 09:00:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:31,246 INFO L225 Difference]: With dead ends: 144 [2020-10-28 09:00:31,246 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 09:00:31,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:00:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 09:00:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-28 09:00:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:00:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-28 09:00:31,252 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 79 [2020-10-28 09:00:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:31,253 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-28 09:00:31,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:00:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-28 09:00:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:00:31,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:31,254 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:31,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:00:31,254 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1109365237, now seen corresponding path program 21 times [2020-10-28 09:00:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:31,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704118983] [2020-10-28 09:00:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:31,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:36,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:00:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:36,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:36,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:36,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:36,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:36,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:36,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:36,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:36,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:36,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:36,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:36,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:36,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-28 09:00:36,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704118983] [2020-10-28 09:00:36,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:36,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:00:36,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635053146] [2020-10-28 09:00:36,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:00:36,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:00:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:00:36,739 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 25 states. [2020-10-28 09:00:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:37,060 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2020-10-28 09:00:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:00:37,060 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 82 [2020-10-28 09:00:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:37,062 INFO L225 Difference]: With dead ends: 149 [2020-10-28 09:00:37,062 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:00:37,063 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 09:00:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:00:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-28 09:00:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:00:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-28 09:00:37,068 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 82 [2020-10-28 09:00:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:37,069 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-28 09:00:37,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:00:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-28 09:00:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:00:37,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:37,070 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:37,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:00:37,070 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash 256995222, now seen corresponding path program 22 times [2020-10-28 09:00:37,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:37,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037850133] [2020-10-28 09:00:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:37,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:37,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:42,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:42,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:00:42,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:00:42,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:42,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:00:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:00:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:00:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:42,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:42,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:42,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-28 09:00:42,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037850133] [2020-10-28 09:00:42,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:42,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:00:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199661957] [2020-10-28 09:00:42,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:00:42,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:00:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:00:42,577 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 26 states. [2020-10-28 09:00:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:42,850 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2020-10-28 09:00:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:00:42,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-10-28 09:00:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:42,851 INFO L225 Difference]: With dead ends: 154 [2020-10-28 09:00:42,851 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 09:00:42,852 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 09:00:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 09:00:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-28 09:00:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 09:00:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-28 09:00:42,858 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 85 [2020-10-28 09:00:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:42,858 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-28 09:00:42,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:00:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-28 09:00:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:00:42,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:42,859 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:42,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:00:42,860 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1632168533, now seen corresponding path program 23 times [2020-10-28 09:00:42,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:42,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959060255] [2020-10-28 09:00:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:42,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:43,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:43,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:47,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:47,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:00:47,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:47,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:00:47,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:47,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:00:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 09:00:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:00:47,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:48,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:48,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:48,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:48,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-28 09:00:48,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959060255] [2020-10-28 09:00:48,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:48,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:00:48,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235255022] [2020-10-28 09:00:48,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:00:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:00:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:00:48,413 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 27 states. [2020-10-28 09:00:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:48,751 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2020-10-28 09:00:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:00:48,751 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2020-10-28 09:00:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:48,753 INFO L225 Difference]: With dead ends: 159 [2020-10-28 09:00:48,753 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 09:00:48,754 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 09:00:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 09:00:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-28 09:00:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:00:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-10-28 09:00:48,760 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 88 [2020-10-28 09:00:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:48,760 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-10-28 09:00:48,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:00:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-10-28 09:00:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 09:00:48,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:48,761 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:48,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:00:48,761 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1565293706, now seen corresponding path program 24 times [2020-10-28 09:00:48,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:48,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473758813] [2020-10-28 09:00:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:48,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:48,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:48,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:53,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:53,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:00:53,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:00:53,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:53,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:00:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 09:00:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:00:53,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:54,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:54,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:54,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:54,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:54,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:00:54,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:54,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:54,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-28 09:00:54,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473758813] [2020-10-28 09:00:54,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:54,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:00:54,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099766561] [2020-10-28 09:00:54,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:00:54,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:54,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:00:54,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:00:54,354 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 28 states. [2020-10-28 09:00:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:54,657 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-10-28 09:00:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:00:54,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-28 09:00:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:54,658 INFO L225 Difference]: With dead ends: 164 [2020-10-28 09:00:54,658 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:00:54,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:00:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:00:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-28 09:00:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 09:00:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-10-28 09:00:54,665 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2020-10-28 09:00:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:54,666 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-10-28 09:00:54,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:00:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-10-28 09:00:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 09:00:54,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:54,667 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:54,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:00:54,667 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash -638876341, now seen corresponding path program 25 times [2020-10-28 09:00:54,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:54,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554702218] [2020-10-28 09:00:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:54,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:54,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:55,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:59,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:59,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 09:00:59,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:59,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:00:59,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:59,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:59,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:00:59,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:00:59,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:00:59,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:00,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:00,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:00,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:00,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:00,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:00,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:01:00,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:00,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:00,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-28 09:01:00,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554702218] [2020-10-28 09:01:00,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:00,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:01:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722289942] [2020-10-28 09:01:00,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:01:00,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:00,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:01:00,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:01:00,288 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 29 states. [2020-10-28 09:01:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:00,617 INFO L93 Difference]: Finished difference Result 169 states and 177 transitions. [2020-10-28 09:01:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:01:00,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 94 [2020-10-28 09:01:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:00,619 INFO L225 Difference]: With dead ends: 169 [2020-10-28 09:01:00,619 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:01:00,620 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 09:01:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:01:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 09:01:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:01:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-28 09:01:00,627 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 94 [2020-10-28 09:01:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:00,628 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-28 09:01:00,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:01:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-28 09:01:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:01:00,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:00,629 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:00,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:01:00,629 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash 12914518, now seen corresponding path program 26 times [2020-10-28 09:01:00,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:00,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502163739] [2020-10-28 09:01:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:00,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:00,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:01,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:05,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:01:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:06,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:06,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:06,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:06,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:06,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:06,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:01:06,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:06,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:06,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-28 09:01:06,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502163739] [2020-10-28 09:01:06,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:06,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:01:06,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340799699] [2020-10-28 09:01:06,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:01:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:06,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:01:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:06,317 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 30 states. [2020-10-28 09:01:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:06,651 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2020-10-28 09:01:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:01:06,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2020-10-28 09:01:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:06,652 INFO L225 Difference]: With dead ends: 174 [2020-10-28 09:01:06,653 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 09:01:06,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 09:01:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-28 09:01:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 09:01:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-28 09:01:06,659 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 97 [2020-10-28 09:01:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:06,660 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-28 09:01:06,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:01:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-28 09:01:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 09:01:06,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:06,660 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:06,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:01:06,661 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash 436976875, now seen corresponding path program 27 times [2020-10-28 09:01:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:06,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768577675] [2020-10-28 09:01:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:06,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:07,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:11,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:11,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:01:11,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:12,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:12,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:12,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:12,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:12,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:12,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:12,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:12,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:12,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-28 09:01:12,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768577675] [2020-10-28 09:01:12,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:12,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:01:12,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752850211] [2020-10-28 09:01:12,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:01:12,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:01:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:01:12,397 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 31 states. [2020-10-28 09:01:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:12,814 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-10-28 09:01:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:01:12,814 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 100 [2020-10-28 09:01:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:12,816 INFO L225 Difference]: With dead ends: 179 [2020-10-28 09:01:12,816 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:01:12,817 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 09:01:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:01:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-28 09:01:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:01:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-28 09:01:12,823 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 100 [2020-10-28 09:01:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:12,823 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-28 09:01:12,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:01:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-28 09:01:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 09:01:12,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:12,824 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:12,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:01:12,825 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash -644345034, now seen corresponding path program 28 times [2020-10-28 09:01:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:12,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745646098] [2020-10-28 09:01:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:12,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:17,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:17,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:01:17,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:17,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:01:17,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:17,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:01:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:01:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:01:17,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:18,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:18,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:18,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:18,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:18,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:18,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:18,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:18,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-28 09:01:18,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745646098] [2020-10-28 09:01:18,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:18,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:01:18,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893269403] [2020-10-28 09:01:18,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:01:18,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:01:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:18,564 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 32 states. [2020-10-28 09:01:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:18,971 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2020-10-28 09:01:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:01:18,971 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2020-10-28 09:01:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:18,973 INFO L225 Difference]: With dead ends: 184 [2020-10-28 09:01:18,973 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 09:01:18,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 09:01:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-28 09:01:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 09:01:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-10-28 09:01:18,981 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 103 [2020-10-28 09:01:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:18,981 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-10-28 09:01:18,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:01:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-10-28 09:01:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 09:01:18,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:18,982 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:18,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:01:18,982 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:18,983 INFO L82 PathProgramCache]: Analyzing trace with hash 338017419, now seen corresponding path program 29 times [2020-10-28 09:01:18,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:18,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901557540] [2020-10-28 09:01:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:19,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:19,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:24,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:24,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 09:01:24,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:01:24,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:24,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:01:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:01:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:24,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:24,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:24,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-28 09:01:24,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901557540] [2020-10-28 09:01:24,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:24,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:01:24,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387035381] [2020-10-28 09:01:24,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:01:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:24,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:01:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:01:24,797 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 33 states. [2020-10-28 09:01:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:25,228 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2020-10-28 09:01:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:01:25,229 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-10-28 09:01:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:25,230 INFO L225 Difference]: With dead ends: 189 [2020-10-28 09:01:25,230 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 09:01:25,232 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 09:01:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 09:01:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-28 09:01:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:01:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2020-10-28 09:01:25,238 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 106 [2020-10-28 09:01:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:25,238 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2020-10-28 09:01:25,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:01:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2020-10-28 09:01:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:01:25,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:25,239 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:25,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:01:25,240 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash -222392554, now seen corresponding path program 30 times [2020-10-28 09:01:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:25,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004784468] [2020-10-28 09:01:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:25,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:25,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:26,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:30,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:30,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:01:30,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:30,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:01:30,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:30,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:01:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:01:30,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:31,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:31,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:31,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-28 09:01:31,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004784468] [2020-10-28 09:01:31,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:31,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:01:31,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562974236] [2020-10-28 09:01:31,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:01:31,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:01:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:01:31,096 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 34 states. [2020-10-28 09:01:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:31,430 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2020-10-28 09:01:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:01:31,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 109 [2020-10-28 09:01:31,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:31,432 INFO L225 Difference]: With dead ends: 194 [2020-10-28 09:01:31,432 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:01:31,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:01:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:01:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-28 09:01:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 09:01:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-28 09:01:31,439 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 109 [2020-10-28 09:01:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:31,439 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-28 09:01:31,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:01:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-28 09:01:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 09:01:31,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:31,440 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:31,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:01:31,441 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1741128747, now seen corresponding path program 31 times [2020-10-28 09:01:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:31,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117470790] [2020-10-28 09:01:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:31,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:31,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:32,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:36,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:01:36,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:37,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:37,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:37,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:37,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:37,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-28 09:01:37,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117470790] [2020-10-28 09:01:37,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:37,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:01:37,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731075581] [2020-10-28 09:01:37,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:01:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:01:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:01:37,393 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 35 states. [2020-10-28 09:01:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:37,713 INFO L93 Difference]: Finished difference Result 199 states and 207 transitions. [2020-10-28 09:01:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:01:37,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 112 [2020-10-28 09:01:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:37,715 INFO L225 Difference]: With dead ends: 199 [2020-10-28 09:01:37,715 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:01:37,717 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 09:01:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:01:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-28 09:01:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:01:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-28 09:01:37,724 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 112 [2020-10-28 09:01:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:37,724 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-28 09:01:37,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:01:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-28 09:01:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 09:01:37,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:37,725 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:37,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:01:37,725 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:37,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1196065526, now seen corresponding path program 32 times [2020-10-28 09:01:37,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:37,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441931801] [2020-10-28 09:01:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:37,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:42,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 09:01:42,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:01:42,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:43,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:43,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:43,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:43,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:43,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:43,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:43,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:43,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-10-28 09:01:43,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441931801] [2020-10-28 09:01:43,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:43,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:01:43,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757328702] [2020-10-28 09:01:43,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:01:43,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:43,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:01:43,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:01:43,744 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 36 states. [2020-10-28 09:01:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:44,124 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2020-10-28 09:01:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:01:44,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 115 [2020-10-28 09:01:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:44,126 INFO L225 Difference]: With dead ends: 204 [2020-10-28 09:01:44,126 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:01:44,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:01:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:01:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-28 09:01:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 09:01:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-28 09:01:44,134 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 115 [2020-10-28 09:01:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:44,134 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-28 09:01:44,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:01:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-28 09:01:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 09:01:44,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:44,135 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:44,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:01:44,135 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:44,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2130645963, now seen corresponding path program 33 times [2020-10-28 09:01:44,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:44,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721043352] [2020-10-28 09:01:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:44,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:44,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:45,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:49,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:49,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:01:49,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:50,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:50,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-28 09:01:50,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721043352] [2020-10-28 09:01:50,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:50,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:01:50,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592904298] [2020-10-28 09:01:50,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:01:50,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:01:50,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:01:50,154 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 37 states. [2020-10-28 09:01:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:50,660 INFO L93 Difference]: Finished difference Result 209 states and 217 transitions. [2020-10-28 09:01:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:01:50,661 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 118 [2020-10-28 09:01:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:50,662 INFO L225 Difference]: With dead ends: 209 [2020-10-28 09:01:50,662 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 09:01:50,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:01:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 09:01:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 09:01:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 09:01:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2020-10-28 09:01:50,669 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 118 [2020-10-28 09:01:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:50,669 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2020-10-28 09:01:50,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:01:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2020-10-28 09:01:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:01:50,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:50,670 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:50,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:01:50,671 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash 667807446, now seen corresponding path program 34 times [2020-10-28 09:01:50,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:50,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604788215] [2020-10-28 09:01:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:50,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:01:55,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:56,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:56,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-28 09:01:56,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604788215] [2020-10-28 09:01:56,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:56,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:01:56,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525854405] [2020-10-28 09:01:56,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:01:56,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:01:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:01:56,730 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand 38 states. [2020-10-28 09:01:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:57,079 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2020-10-28 09:01:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:01:57,079 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 121 [2020-10-28 09:01:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:57,081 INFO L225 Difference]: With dead ends: 214 [2020-10-28 09:01:57,081 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 09:01:57,082 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 09:01:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 09:01:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-28 09:01:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 09:01:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-28 09:01:57,088 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 121 [2020-10-28 09:01:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:57,088 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-28 09:01:57,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:01:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-28 09:01:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 09:01:57,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:57,089 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:57,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:01:57,090 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:57,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1851419499, now seen corresponding path program 35 times [2020-10-28 09:01:57,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:57,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820814251] [2020-10-28 09:01:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:57,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:57,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:02,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:02,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 09:02:02,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:02,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:02:02,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:02,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:02:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 09:02:02,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:02:02,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:03,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-28 09:02:03,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820814251] [2020-10-28 09:02:03,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:03,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:02:03,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158571085] [2020-10-28 09:02:03,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:02:03,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:03,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:02:03,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:03,211 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 39 states. [2020-10-28 09:02:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:03,736 INFO L93 Difference]: Finished difference Result 219 states and 227 transitions. [2020-10-28 09:02:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:02:03,736 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 124 [2020-10-28 09:02:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:03,738 INFO L225 Difference]: With dead ends: 219 [2020-10-28 09:02:03,738 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:02:03,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:02:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-28 09:02:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:02:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-28 09:02:03,746 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 124 [2020-10-28 09:02:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:03,747 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-28 09:02:03,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:02:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-28 09:02:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 09:02:03,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:03,748 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:03,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:02:03,748 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1515901622, now seen corresponding path program 36 times [2020-10-28 09:02:03,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:03,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800144099] [2020-10-28 09:02:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:03,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:03,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:08,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:08,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 09:02:08,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:08,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:02:08,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:08,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:08,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:02:08,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:08,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:02:08,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:09,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:09,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:09,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:09,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:09,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:09,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:09,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:09,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2020-10-28 09:02:09,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800144099] [2020-10-28 09:02:09,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:09,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:02:09,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398906562] [2020-10-28 09:02:09,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:02:09,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:09,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:02:09,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:02:09,920 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 40 states. [2020-10-28 09:02:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:10,285 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2020-10-28 09:02:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:02:10,286 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 127 [2020-10-28 09:02:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:10,287 INFO L225 Difference]: With dead ends: 224 [2020-10-28 09:02:10,287 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 09:02:10,289 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 09:02:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 09:02:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-28 09:02:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 09:02:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2020-10-28 09:02:10,295 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 127 [2020-10-28 09:02:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:10,295 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2020-10-28 09:02:10,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:02:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2020-10-28 09:02:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 09:02:10,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:10,296 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:10,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:02:10,297 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash -723023093, now seen corresponding path program 37 times [2020-10-28 09:02:10,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:10,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510014133] [2020-10-28 09:02:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:10,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:10,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:15,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:15,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 09:02:15,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:15,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:02:15,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:15,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:15,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:02:15,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:15,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 09:02:15,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:16,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:16,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:16,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:16,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:16,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:16,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:16,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-10-28 09:02:16,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510014133] [2020-10-28 09:02:16,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:16,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:02:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996977926] [2020-10-28 09:02:16,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:02:16,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:02:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:02:16,496 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand 41 states. [2020-10-28 09:02:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:16,972 INFO L93 Difference]: Finished difference Result 229 states and 237 transitions. [2020-10-28 09:02:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:02:16,972 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 130 [2020-10-28 09:02:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:16,974 INFO L225 Difference]: With dead ends: 229 [2020-10-28 09:02:16,974 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:02:16,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:02:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:02:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-28 09:02:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 09:02:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2020-10-28 09:02:16,981 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 130 [2020-10-28 09:02:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:16,981 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2020-10-28 09:02:16,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:02:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2020-10-28 09:02:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 09:02:16,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:16,982 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:16,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:02:16,982 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:16,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:16,982 INFO L82 PathProgramCache]: Analyzing trace with hash 981675670, now seen corresponding path program 38 times [2020-10-28 09:02:16,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:16,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138022156] [2020-10-28 09:02:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:17,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 09:02:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:22,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:02:22,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:23,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:23,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:23,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:23,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:23,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:23,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:23,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:23,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:23,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:23,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:23,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:23,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-10-28 09:02:23,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138022156] [2020-10-28 09:02:23,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:23,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 09:02:23,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599907463] [2020-10-28 09:02:23,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 09:02:23,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 09:02:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:02:23,233 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand 42 states. [2020-10-28 09:02:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:23,614 INFO L93 Difference]: Finished difference Result 234 states and 242 transitions. [2020-10-28 09:02:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 09:02:23,615 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 133 [2020-10-28 09:02:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:23,616 INFO L225 Difference]: With dead ends: 234 [2020-10-28 09:02:23,616 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 09:02:23,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:02:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 09:02:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-28 09:02:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 09:02:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-10-28 09:02:23,625 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 133 [2020-10-28 09:02:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:23,625 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-10-28 09:02:23,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 09:02:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-10-28 09:02:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 09:02:23,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:23,626 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:23,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:02:23,627 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413461, now seen corresponding path program 39 times [2020-10-28 09:02:23,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:23,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388581454] [2020-10-28 09:02:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:24,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:28,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:02:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:29,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:29,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:29,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:29,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:29,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:29,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:29,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:29,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:29,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-10-28 09:02:29,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388581454] [2020-10-28 09:02:29,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:29,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 09:02:29,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565485590] [2020-10-28 09:02:29,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 09:02:29,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:29,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 09:02:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:02:29,969 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 43 states. [2020-10-28 09:02:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:30,550 INFO L93 Difference]: Finished difference Result 239 states and 247 transitions. [2020-10-28 09:02:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:02:30,551 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 136 [2020-10-28 09:02:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:30,552 INFO L225 Difference]: With dead ends: 239 [2020-10-28 09:02:30,552 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:02:30,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:02:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:02:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-28 09:02:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:02:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2020-10-28 09:02:30,560 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 136 [2020-10-28 09:02:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:30,560 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2020-10-28 09:02:30,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 09:02:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2020-10-28 09:02:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 09:02:30,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:30,561 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:30,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:02:30,562 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash -648478090, now seen corresponding path program 40 times [2020-10-28 09:02:30,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:30,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333637874] [2020-10-28 09:02:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:35,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 09:02:35,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:35,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 09:02:35,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:35,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 09:02:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:02:35,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:36,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:36,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:36,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:36,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:36,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:36,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:36,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-28 09:02:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333637874] [2020-10-28 09:02:37,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:37,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 09:02:37,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513314609] [2020-10-28 09:02:37,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 09:02:37,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 09:02:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:02:37,021 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand 44 states. [2020-10-28 09:02:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:37,441 INFO L93 Difference]: Finished difference Result 244 states and 252 transitions. [2020-10-28 09:02:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 09:02:37,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 139 [2020-10-28 09:02:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:37,443 INFO L225 Difference]: With dead ends: 244 [2020-10-28 09:02:37,443 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 09:02:37,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:02:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 09:02:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-28 09:02:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 09:02:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2020-10-28 09:02:37,452 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 139 [2020-10-28 09:02:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:37,452 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2020-10-28 09:02:37,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 09:02:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2020-10-28 09:02:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-28 09:02:37,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:37,453 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:37,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:02:37,454 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2018452043, now seen corresponding path program 41 times [2020-10-28 09:02:37,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:37,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744580741] [2020-10-28 09:02:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:37,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking...