/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:25:39,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:25:39,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:25:39,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:25:39,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:25:39,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:25:39,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:25:39,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:25:39,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:25:39,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:25:39,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:25:39,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:25:39,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:25:39,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:25:39,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:25:39,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:25:39,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:25:39,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:25:39,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:25:39,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:25:39,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:25:39,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:25:39,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:25:39,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:25:39,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:25:39,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:25:39,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:25:39,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:25:39,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:25:39,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:25:39,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:25:39,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:25:39,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:25:39,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:25:39,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:25:39,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:25:39,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:25:39,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:25:39,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:25:39,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:25:39,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:25:39,815 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 08:25:39,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:25:39,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:25:39,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:25:39,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:25:39,845 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:25:39,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:25:39,845 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:25:39,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:25:39,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:25:39,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:25:39,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:25:39,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:25:39,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:25:39,847 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:25:39,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:25:39,847 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:25:39,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:25:39,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:25:39,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:25:39,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:25:39,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:25:39,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:25:39,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:25:39,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:25:39,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:25:39,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:25:39,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:25:39,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:25:39,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:25:39,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:25:40,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:25:40,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:25:40,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:25:40,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:25:40,302 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:25:40,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label57.c [2020-10-29 08:25:40,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/503247cab/d65565ac2b6048a6b292e3c65895290a/FLAG5b709dc52 [2020-10-29 08:25:41,422 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:25:41,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label57.c [2020-10-29 08:25:41,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/503247cab/d65565ac2b6048a6b292e3c65895290a/FLAG5b709dc52 [2020-10-29 08:25:41,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/503247cab/d65565ac2b6048a6b292e3c65895290a [2020-10-29 08:25:41,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:25:41,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:25:41,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:25:41,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:25:41,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:25:41,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:25:41" (1/1) ... [2020-10-29 08:25:41,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d774bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:41, skipping insertion in model container [2020-10-29 08:25:41,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:25:41" (1/1) ... [2020-10-29 08:25:41,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:25:42,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:25:43,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:25:43,151 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:25:43,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:25:43,588 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:25:43,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43 WrapperNode [2020-10-29 08:25:43,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:25:43,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:25:43,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:25:43,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:25:43,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... [2020-10-29 08:25:43,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... [2020-10-29 08:25:43,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... [2020-10-29 08:25:43,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... [2020-10-29 08:25:43,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... [2020-10-29 08:25:43,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... [2020-10-29 08:25:43,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... [2020-10-29 08:25:43,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:25:43,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:25:43,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:25:43,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:25:43,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:25:44,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:25:44,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:25:44,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:25:44,088 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:25:44,088 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:25:44,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:25:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:25:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:25:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:25:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:25:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:25:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:25:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:25:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:25:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:25:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:25:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:25:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:25:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:25:44,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:25:44,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:25:53,652 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:25:53,652 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:25:53,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:25:53 BoogieIcfgContainer [2020-10-29 08:25:53,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:25:53,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:25:53,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:25:53,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:25:53,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:25:41" (1/3) ... [2020-10-29 08:25:53,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211f107a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:25:53, skipping insertion in model container [2020-10-29 08:25:53,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:25:43" (2/3) ... [2020-10-29 08:25:53,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211f107a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:25:53, skipping insertion in model container [2020-10-29 08:25:53,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:25:53" (3/3) ... [2020-10-29 08:25:53,672 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label57.c [2020-10-29 08:25:53,689 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:25:53,697 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:25:53,710 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:25:53,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:25:53,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:25:53,746 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:25:53,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:25:53,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:25:53,747 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:25:53,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:25:53,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:25:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:25:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 08:25:53,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:53,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:53,789 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash 568825922, now seen corresponding path program 1 times [2020-10-29 08:25:53,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:53,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834349019] [2020-10-29 08:25:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:54,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:54,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:54,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 08:25:54,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-29 08:25:54,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:54,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:25:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:25:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 08:25:54,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:25:54,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:54,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:54,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:54,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:54,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:54,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-29 08:25:54,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:54,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:25:54,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:25:54,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834349019] [2020-10-29 08:25:54,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:25:54,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:25:54,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75333939] [2020-10-29 08:25:54,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:25:54,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:25:54,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:25:54,970 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:26:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:07,686 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-29 08:26:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:26:07,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 08:26:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:07,716 INFO L225 Difference]: With dead ends: 1694 [2020-10-29 08:26:07,716 INFO L226 Difference]: Without dead ends: 1010 [2020-10-29 08:26:07,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:26:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-29 08:26:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-29 08:26:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-29 08:26:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-29 08:26:07,872 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 24 [2020-10-29 08:26:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:07,873 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-29 08:26:07,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:26:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-29 08:26:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 08:26:07,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:07,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:07,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:26:07,883 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:07,884 INFO L82 PathProgramCache]: Analyzing trace with hash 690498978, now seen corresponding path program 1 times [2020-10-29 08:26:07,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:07,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146545815] [2020-10-29 08:26:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:08,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:08,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:09,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:09,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 08:26:09,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:26:09,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-29 08:26:09,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:09,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:09,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:26:09,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:09,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:26:09,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:09,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:09,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:09,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:09,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:09,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:09,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:26:09,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:09,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:09,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:09,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:09,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:09,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:09,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:26:09,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:09,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-29 08:26:09,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:09,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:09,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:26:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:26:09,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146545815] [2020-10-29 08:26:09,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:26:09,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:26:09,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682215091] [2020-10-29 08:26:09,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:26:09,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:26:09,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:26:09,879 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-29 08:26:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:23,975 INFO L93 Difference]: Finished difference Result 2447 states and 3895 transitions. [2020-10-29 08:26:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:26:23,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-29 08:26:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:23,986 INFO L225 Difference]: With dead ends: 2447 [2020-10-29 08:26:23,986 INFO L226 Difference]: Without dead ends: 1461 [2020-10-29 08:26:23,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:26:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2020-10-29 08:26:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1433. [2020-10-29 08:26:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-29 08:26:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-29 08:26:24,071 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 95 [2020-10-29 08:26:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:24,072 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-29 08:26:24,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:26:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-29 08:26:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 08:26:24,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:24,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:24,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:26:24,087 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash -716268689, now seen corresponding path program 1 times [2020-10-29 08:26:24,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:24,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884109190] [2020-10-29 08:26:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:24,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:24,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:26:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-29 08:26:24,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:24,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-29 08:26:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 08:26:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:24,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:24,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:24,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:24,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:24,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:26:24,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:24,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:24,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:26:24,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:24,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:26:24,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:24,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:24,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:24,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:24,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:26:24,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:24,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-29 08:26:24,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:24,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 08:26:24,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:26:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884109190] [2020-10-29 08:26:24,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:24,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:26:24,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048753326] [2020-10-29 08:26:24,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:26:24,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:26:24,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:26:24,860 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 5 states. [2020-10-29 08:26:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:40,191 INFO L93 Difference]: Finished difference Result 3331 states and 4572 transitions. [2020-10-29 08:26:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:26:40,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-29 08:26:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:40,203 INFO L225 Difference]: With dead ends: 3331 [2020-10-29 08:26:40,204 INFO L226 Difference]: Without dead ends: 1891 [2020-10-29 08:26:40,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:26:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-10-29 08:26:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1882. [2020-10-29 08:26:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-10-29 08:26:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2300 transitions. [2020-10-29 08:26:40,265 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2300 transitions. Word has length 98 [2020-10-29 08:26:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:40,265 INFO L481 AbstractCegarLoop]: Abstraction has 1882 states and 2300 transitions. [2020-10-29 08:26:40,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:26:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2300 transitions. [2020-10-29 08:26:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-29 08:26:40,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:40,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:40,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:26:40,270 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -278546562, now seen corresponding path program 1 times [2020-10-29 08:26:40,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:40,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450691397] [2020-10-29 08:26:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:40,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:40,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:41,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:41,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-29 08:26:41,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:26:41,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-29 08:26:41,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:41,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:41,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:41,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:26:41,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:26:41,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:41,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:41,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:41,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:41,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:41,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:26:41,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:41,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:41,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:26:41,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:41,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:26:41,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:41,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:41,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:42,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:42,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:26:42,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:42,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-29 08:26:42,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:42,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:42,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:42,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:42,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:26:42,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:42,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:26:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:42,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:42,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:42,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:26:42,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:42,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-29 08:26:42,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:42,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:26:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:26:42,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450691397] [2020-10-29 08:26:42,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:42,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:26:42,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189913134] [2020-10-29 08:26:42,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:26:42,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:26:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:26:42,464 INFO L87 Difference]: Start difference. First operand 1882 states and 2300 transitions. Second operand 7 states. [2020-10-29 08:26:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:55,756 INFO L93 Difference]: Finished difference Result 4249 states and 5492 transitions. [2020-10-29 08:26:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:26:55,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2020-10-29 08:26:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:55,773 INFO L225 Difference]: With dead ends: 4249 [2020-10-29 08:26:55,773 INFO L226 Difference]: Without dead ends: 2806 [2020-10-29 08:26:55,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:26:55,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2020-10-29 08:26:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2790. [2020-10-29 08:26:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2020-10-29 08:26:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3417 transitions. [2020-10-29 08:26:55,866 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3417 transitions. Word has length 184 [2020-10-29 08:26:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:55,867 INFO L481 AbstractCegarLoop]: Abstraction has 2790 states and 3417 transitions. [2020-10-29 08:26:55,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:26:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3417 transitions. [2020-10-29 08:26:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-29 08:26:55,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:55,871 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:55,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:26:55,871 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash -972949478, now seen corresponding path program 1 times [2020-10-29 08:26:55,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:55,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283342427] [2020-10-29 08:26:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:55,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:56,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:57,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:58,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:59,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:59,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-29 08:26:59,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:26:59,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3510 [2020-10-29 08:26:59,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:59,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:26:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:26:59,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:26:59,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:59,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:59,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:59,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:59,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:26:59,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:59,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:59,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:59,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:00,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:00,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:00,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:00,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-29 08:27:00,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:00,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:00,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:27:00,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:00,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:27:00,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:27:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:00,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:00,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:00,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:27:00,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:00,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 08:27:00,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:00,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:00,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:27:00,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 36 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:27:00,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283342427] [2020-10-29 08:27:00,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:00,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:27:00,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284245439] [2020-10-29 08:27:00,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:27:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:27:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:27:00,623 INFO L87 Difference]: Start difference. First operand 2790 states and 3417 transitions. Second operand 10 states. [2020-10-29 08:27:06,947 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-29 08:27:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:28,385 INFO L93 Difference]: Finished difference Result 8020 states and 10283 transitions. [2020-10-29 08:27:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 08:27:28,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 186 [2020-10-29 08:27:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:28,420 INFO L225 Difference]: With dead ends: 8020 [2020-10-29 08:27:28,420 INFO L226 Difference]: Without dead ends: 5669 [2020-10-29 08:27:28,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 08:27:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2020-10-29 08:27:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 5151. [2020-10-29 08:27:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5151 states. [2020-10-29 08:27:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 6476 transitions. [2020-10-29 08:27:28,580 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 6476 transitions. Word has length 186 [2020-10-29 08:27:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:28,581 INFO L481 AbstractCegarLoop]: Abstraction has 5151 states and 6476 transitions. [2020-10-29 08:27:28,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:27:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 6476 transitions. [2020-10-29 08:27:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-29 08:27:28,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:28,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:28,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:27:28,588 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1531087280, now seen corresponding path program 1 times [2020-10-29 08:27:28,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:28,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886529433] [2020-10-29 08:27:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:29,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:29,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-29 08:27:29,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:27:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-29 08:27:29,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:29,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:27:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:27:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:27:29,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:29,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:29,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:29,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:29,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:29,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:29,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:27:29,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:29,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:29,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:29,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:29,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:30,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:30,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:30,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:30,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-29 08:27:30,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:30,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:30,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:30,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:30,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:27:30,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:30,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:30,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:30,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:27:30,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:27:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-29 08:27:30,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:30,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:27:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:27:30,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886529433] [2020-10-29 08:27:30,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:30,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:27:30,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122744873] [2020-10-29 08:27:30,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:27:30,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:27:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:27:30,463 INFO L87 Difference]: Start difference. First operand 5151 states and 6476 transitions. Second operand 5 states. [2020-10-29 08:27:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:42,473 INFO L93 Difference]: Finished difference Result 10309 states and 12973 transitions. [2020-10-29 08:27:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:27:42,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 197 [2020-10-29 08:27:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:42,508 INFO L225 Difference]: With dead ends: 10309 [2020-10-29 08:27:42,508 INFO L226 Difference]: Without dead ends: 5164 [2020-10-29 08:27:42,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:27:42,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5164 states. [2020-10-29 08:27:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5164 to 5141. [2020-10-29 08:27:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5141 states. [2020-10-29 08:27:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5141 states to 5141 states and 6428 transitions. [2020-10-29 08:27:42,674 INFO L78 Accepts]: Start accepts. Automaton has 5141 states and 6428 transitions. Word has length 197 [2020-10-29 08:27:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:42,675 INFO L481 AbstractCegarLoop]: Abstraction has 5141 states and 6428 transitions. [2020-10-29 08:27:42,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:27:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5141 states and 6428 transitions. [2020-10-29 08:27:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-29 08:27:42,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:42,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:42,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:27:42,682 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1564365845, now seen corresponding path program 1 times [2020-10-29 08:27:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:42,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425075102] [2020-10-29 08:27:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:42,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:43,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:43,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:47,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:47,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-29 08:27:47,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:27:47,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4316 [2020-10-29 08:27:47,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:47,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:27:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:27:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-29 08:27:47,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:47,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:47,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:47,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:47,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:47,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:47,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:27:47,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:47,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:47,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:47,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:47,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:27:47,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:47,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:47,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:47,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:47,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:47,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-29 08:27:47,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:47,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:27:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:27:47,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:47,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:47,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:47,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:47,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 08:27:47,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:47,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-29 08:27:47,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:47,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:47,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 08:27:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:47,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-29 08:27:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:48,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:48,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:27:48,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:48,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 08:27:48,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:48,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:48,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:27:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:48,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 124 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 08:27:48,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425075102] [2020-10-29 08:27:48,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:48,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 08:27:48,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044840678] [2020-10-29 08:27:48,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:27:48,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:27:48,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:27:48,298 INFO L87 Difference]: Start difference. First operand 5141 states and 6428 transitions. Second operand 10 states. [2020-10-29 08:27:48,571 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-29 08:27:54,057 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-29 08:27:57,559 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 08:28:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:28:11,687 INFO L93 Difference]: Finished difference Result 15486 states and 19778 transitions. [2020-10-29 08:28:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 08:28:11,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 264 [2020-10-29 08:28:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:28:11,741 INFO L225 Difference]: With dead ends: 15486 [2020-10-29 08:28:11,741 INFO L226 Difference]: Without dead ends: 9456 [2020-10-29 08:28:11,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-29 08:28:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9456 states. [2020-10-29 08:28:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9456 to 9277. [2020-10-29 08:28:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9277 states. [2020-10-29 08:28:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9277 states to 9277 states and 11098 transitions. [2020-10-29 08:28:12,003 INFO L78 Accepts]: Start accepts. Automaton has 9277 states and 11098 transitions. Word has length 264 [2020-10-29 08:28:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:28:12,003 INFO L481 AbstractCegarLoop]: Abstraction has 9277 states and 11098 transitions. [2020-10-29 08:28:12,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:28:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 9277 states and 11098 transitions. [2020-10-29 08:28:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-29 08:28:12,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:28:12,009 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:28:12,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:28:12,010 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:28:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:28:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash 591152140, now seen corresponding path program 1 times [2020-10-29 08:28:12,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:28:12,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203837687] [2020-10-29 08:28:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:28:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:12,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:12,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:13,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:15,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:17,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:17,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-29 08:28:17,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:28:17,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-29 08:28:17,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:17,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:17,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 08:28:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:28:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-29 08:28:17,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:17,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:17,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:17,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:17,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:17,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 08:28:17,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:17,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:28:17,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:28:17,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:17,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:17,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:17,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:28:17,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:17,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-29 08:28:17,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:17,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:17,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:28:17,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:17,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:28:17,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:28:17,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:28:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:17,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:17,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:17,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:28:17,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:17,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-29 08:28:17,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:17,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:28:17,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:18,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:28:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:18,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:18,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:28:18,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-29 08:28:18,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:18,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:28:18,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 50 proven. 159 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-29 08:28:18,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203837687] [2020-10-29 08:28:18,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:18,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:28:18,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233380659] [2020-10-29 08:28:18,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:28:18,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:28:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:28:18,372 INFO L87 Difference]: Start difference. First operand 9277 states and 11098 transitions. Second operand 10 states. [2020-10-29 08:28:18,592 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 08:28:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:28:36,576 INFO L93 Difference]: Finished difference Result 21956 states and 28917 transitions. [2020-10-29 08:28:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 08:28:36,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 272 [2020-10-29 08:28:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:28:36,643 INFO L225 Difference]: With dead ends: 21956 [2020-10-29 08:28:36,643 INFO L226 Difference]: Without dead ends: 12659 [2020-10-29 08:28:36,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 08:28:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12659 states. [2020-10-29 08:28:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12659 to 12371. [2020-10-29 08:28:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12371 states. [2020-10-29 08:28:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12371 states to 12371 states and 14605 transitions. [2020-10-29 08:28:37,068 INFO L78 Accepts]: Start accepts. Automaton has 12371 states and 14605 transitions. Word has length 272 [2020-10-29 08:28:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:28:37,069 INFO L481 AbstractCegarLoop]: Abstraction has 12371 states and 14605 transitions. [2020-10-29 08:28:37,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:28:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 12371 states and 14605 transitions. [2020-10-29 08:28:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-29 08:28:37,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:28:37,078 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:28:37,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:28:37,079 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:28:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:28:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1696945171, now seen corresponding path program 1 times [2020-10-29 08:28:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:28:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057216498] [2020-10-29 08:28:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:28:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:37,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:38,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:39,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:42,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:42,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-29 08:28:42,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 08:28:42,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-29 08:28:42,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:42,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:28:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 08:28:42,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:42,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:28:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:42,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:42,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:42,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:28:42,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:28:42,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:42,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:42,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:28:42,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:28:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:42,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:42,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:42,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:28:42,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-29 08:28:42,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:42,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:28:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:28:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:28:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:28:42,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:28:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:43,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:43,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:28:43,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:43,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-29 08:28:43,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:43,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:43,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:28:43,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:28:43,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:28:43,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:43,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-29 08:28:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:28:43,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:28:43,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:28:43,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:28:43,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:28:43,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-29 08:28:43,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:28:43,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:28:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:28:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:28:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:28:43,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:28:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 136 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-29 08:28:43,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057216498] [2020-10-29 08:28:43,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:28:43,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:28:43,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418951221] [2020-10-29 08:28:43,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:28:43,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:28:43,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:28:43,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:28:43,748 INFO L87 Difference]: Start difference. First operand 12371 states and 14605 transitions. Second operand 7 states. [2020-10-29 08:28:50,654 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 08:29:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:29:03,597 INFO L93 Difference]: Finished difference Result 26242 states and 31133 transitions. [2020-10-29 08:29:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:29:03,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 295 [2020-10-29 08:29:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:29:03,655 INFO L225 Difference]: With dead ends: 26242 [2020-10-29 08:29:03,656 INFO L226 Difference]: Without dead ends: 14745 [2020-10-29 08:29:03,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:29:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14745 states. [2020-10-29 08:29:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14745 to 14578. [2020-10-29 08:29:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14578 states. [2020-10-29 08:29:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 17008 transitions. [2020-10-29 08:29:03,980 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 17008 transitions. Word has length 295 [2020-10-29 08:29:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:29:03,981 INFO L481 AbstractCegarLoop]: Abstraction has 14578 states and 17008 transitions. [2020-10-29 08:29:03,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:29:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 17008 transitions. [2020-10-29 08:29:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-29 08:29:03,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:29:03,991 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:29:03,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 08:29:03,992 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:29:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:29:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1192562268, now seen corresponding path program 1 times [2020-10-29 08:29:03,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:29:03,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566553352] [2020-10-29 08:29:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:29:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:05,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:05,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:09,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:09,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-29 08:29:09,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 08:29:09,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-29 08:29:09,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:09,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:09,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:29:09,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:29:09,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-29 08:29:09,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:09,319 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:29:09,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:29:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:09,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:09,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:09,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:29:09,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:09,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:29:09,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:09,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:09,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:09,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:29:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:09,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:09,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:09,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:29:09,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:09,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-29 08:29:09,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:09,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:09,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:29:09,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:09,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:29:09,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:09,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:29:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:09,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:09,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:09,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:29:09,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:29:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 08:29:09,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:09,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:29:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:29:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:29:09,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:09,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:29:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:09,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:09,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:09,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 08:29:09,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:09,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-29 08:29:09,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:09,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:09,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:29:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:29:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 08:29:09,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:29:10,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-10-29 08:29:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:29:10,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:29:10,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:29:10,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:29:10,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:29:10,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-29 08:29:10,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:29:10,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:29:10,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:29:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:29:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:29:10,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:29:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 204 proven. 72 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-29 08:29:10,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566553352] [2020-10-29 08:29:10,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:29:10,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:29:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697021713] [2020-10-29 08:29:10,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:29:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:29:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:29:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:29:10,291 INFO L87 Difference]: Start difference. First operand 14578 states and 17008 transitions. Second operand 7 states. [2020-10-29 08:29:20,709 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66