/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 11:04:11,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 11:04:11,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 11:04:11,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 11:04:11,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 11:04:11,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 11:04:11,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 11:04:11,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 11:04:11,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 11:04:11,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 11:04:11,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 11:04:11,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 11:04:11,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 11:04:11,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 11:04:11,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 11:04:11,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 11:04:11,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 11:04:11,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 11:04:11,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 11:04:11,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 11:04:11,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 11:04:11,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 11:04:11,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 11:04:11,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 11:04:11,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 11:04:11,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 11:04:11,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 11:04:11,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 11:04:11,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 11:04:11,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 11:04:11,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 11:04:11,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 11:04:11,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 11:04:11,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 11:04:11,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 11:04:11,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 11:04:11,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 11:04:11,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 11:04:11,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 11:04:11,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 11:04:11,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 11:04:11,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 11:04:11,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 11:04:11,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 11:04:11,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 11:04:11,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 11:04:11,800 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 11:04:11,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 11:04:11,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 11:04:11,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 11:04:11,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 11:04:11,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 11:04:11,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 11:04:11,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 11:04:11,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 11:04:11,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 11:04:11,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 11:04:11,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 11:04:11,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 11:04:11,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 11:04:11,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 11:04:11,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 11:04:11,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 11:04:11,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:04:11,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 11:04:11,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 11:04:11,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 11:04:11,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 11:04:11,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 11:04:11,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 11:04:11,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 11:04:11,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 11:04:12,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 11:04:12,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 11:04:12,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 11:04:12,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 11:04:12,227 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 11:04:12,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label36.c [2020-10-28 11:04:12,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ae64d4c0/f69087655d21435fb447673a43aefc1f/FLAG6b95e6a30 [2020-10-28 11:04:13,469 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 11:04:13,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label36.c [2020-10-28 11:04:13,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ae64d4c0/f69087655d21435fb447673a43aefc1f/FLAG6b95e6a30 [2020-10-28 11:04:13,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ae64d4c0/f69087655d21435fb447673a43aefc1f [2020-10-28 11:04:13,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 11:04:13,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 11:04:13,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 11:04:13,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 11:04:13,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 11:04:13,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:04:13" (1/1) ... [2020-10-28 11:04:13,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3578e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:13, skipping insertion in model container [2020-10-28 11:04:13,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:04:13" (1/1) ... [2020-10-28 11:04:13,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 11:04:14,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 11:04:16,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:04:16,144 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 11:04:17,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:04:17,288 INFO L208 MainTranslator]: Completed translation [2020-10-28 11:04:17,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17 WrapperNode [2020-10-28 11:04:17,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 11:04:17,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 11:04:17,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 11:04:17,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 11:04:17,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... [2020-10-28 11:04:17,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... [2020-10-28 11:04:17,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... [2020-10-28 11:04:17,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... [2020-10-28 11:04:17,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... [2020-10-28 11:04:17,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... [2020-10-28 11:04:17,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... [2020-10-28 11:04:17,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 11:04:17,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 11:04:17,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 11:04:17,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 11:04:17,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:04:17,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 11:04:17,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 11:04:17,975 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 11:04:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 11:04:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 11:04:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 11:04:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 11:04:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 11:04:17,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 11:04:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 11:04:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 11:04:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 11:04:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 11:04:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 11:04:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 11:04:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 11:04:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 11:04:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 11:04:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 11:04:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 11:04:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 11:04:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 11:04:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 11:04:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 11:04:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 11:04:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 11:04:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 11:04:25,578 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 11:04:25,579 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 11:04:25,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:04:25 BoogieIcfgContainer [2020-10-28 11:04:25,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 11:04:25,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 11:04:25,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 11:04:25,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 11:04:25,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:04:13" (1/3) ... [2020-10-28 11:04:25,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa3312c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:04:25, skipping insertion in model container [2020-10-28 11:04:25,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:17" (2/3) ... [2020-10-28 11:04:25,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa3312c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:04:25, skipping insertion in model container [2020-10-28 11:04:25,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:04:25" (3/3) ... [2020-10-28 11:04:25,597 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label36.c [2020-10-28 11:04:25,610 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 11:04:25,621 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 11:04:25,633 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 11:04:25,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 11:04:25,669 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 11:04:25,669 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 11:04:25,669 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 11:04:25,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 11:04:25,670 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 11:04:25,670 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 11:04:25,670 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 11:04:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 11:04:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2020-10-28 11:04:25,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:04:25,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:04:25,804 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:04:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:04:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash 91841440, now seen corresponding path program 1 times [2020-10-28 11:04:25,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:04:25,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289740893] [2020-10-28 11:04:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:04:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:27,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:30,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:31,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:31,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 968 [2020-10-28 11:04:31,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:04:31,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 11:04:31,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:31,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:31,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 11:04:31,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:04:31,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 959 [2020-10-28 11:04:31,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 11:04:33,303 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:04:33,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:04:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:33,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:33,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:33,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:04:33,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:33,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 11:04:33,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:33,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:04:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:04:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:04:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:04:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:04:35,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289740893] [2020-10-28 11:04:35,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:04:35,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 11:04:35,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093191887] [2020-10-28 11:04:35,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 11:04:35,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:04:35,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 11:04:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 11:04:35,073 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 11:04:35,322 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:04:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:04:52,000 INFO L93 Difference]: Finished difference Result 3770 states and 7012 transitions. [2020-10-28 11:04:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 11:04:52,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 950 [2020-10-28 11:04:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:04:52,063 INFO L225 Difference]: With dead ends: 3770 [2020-10-28 11:04:52,063 INFO L226 Difference]: Without dead ends: 2387 [2020-10-28 11:04:52,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 11:04:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-28 11:04:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2374. [2020-10-28 11:04:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-10-28 11:04:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3972 transitions. [2020-10-28 11:04:52,311 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3972 transitions. Word has length 950 [2020-10-28 11:04:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:04:52,314 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3972 transitions. [2020-10-28 11:04:52,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 11:04:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3972 transitions. [2020-10-28 11:04:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2020-10-28 11:04:52,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:04:52,402 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:04:52,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 11:04:52,402 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:04:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:04:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1065137305, now seen corresponding path program 1 times [2020-10-28 11:04:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:04:52,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857348532] [2020-10-28 11:04:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:04:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:54,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:57,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:57,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 982 [2020-10-28 11:04:57,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:04:57,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-28 11:04:57,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:57,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:57,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:04:57,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:04:57,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 11:04:57,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:58,198 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:04:58,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:04:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:58,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:58,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:04:58,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:58,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 11:04:58,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:58,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:58,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:04:58,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:04:58,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:04:58,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:58,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:04:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:58,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:58,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:58,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:04:58,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 11:04:58,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:58,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:04:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:04:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:04:58,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:04:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:04:59,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857348532] [2020-10-28 11:04:59,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:04:59,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:04:59,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906729204] [2020-10-28 11:04:59,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:04:59,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:04:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:04:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:04:59,352 INFO L87 Difference]: Start difference. First operand 2374 states and 3972 transitions. Second operand 7 states. [2020-10-28 11:04:59,648 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:00,826 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:05:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:05:19,968 INFO L93 Difference]: Finished difference Result 6954 states and 11751 transitions. [2020-10-28 11:05:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 11:05:19,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 962 [2020-10-28 11:05:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:05:20,000 INFO L225 Difference]: With dead ends: 6954 [2020-10-28 11:05:20,000 INFO L226 Difference]: Without dead ends: 4586 [2020-10-28 11:05:20,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:05:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2020-10-28 11:05:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4542. [2020-10-28 11:05:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2020-10-28 11:05:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 7000 transitions. [2020-10-28 11:05:20,167 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 7000 transitions. Word has length 962 [2020-10-28 11:05:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:05:20,168 INFO L481 AbstractCegarLoop]: Abstraction has 4542 states and 7000 transitions. [2020-10-28 11:05:20,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:05:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 7000 transitions. [2020-10-28 11:05:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2020-10-28 11:05:20,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:05:20,212 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:05:20,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:05:20,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:05:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:05:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2016127441, now seen corresponding path program 1 times [2020-10-28 11:05:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:05:20,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308068542] [2020-10-28 11:05:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:05:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:20,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:22,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:25,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:25,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 986 [2020-10-28 11:05:25,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:05:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 11:05:25,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:25,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:25,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:05:25,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:05:25,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:05:25,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:25,805 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:05:25,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:05:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:25,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:25,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:25,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:05:25,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:25,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 11:05:25,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:25,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:25,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:05:25,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:25,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:05:25,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:25,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:05:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:25,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:26,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:26,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:05:26,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:26,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 11:05:26,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:26,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:05:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 11:05:26,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:05:26,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308068542] [2020-10-28 11:05:26,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:05:26,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 11:05:26,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119443909] [2020-10-28 11:05:26,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:05:26,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:05:26,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:05:26,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:05:26,812 INFO L87 Difference]: Start difference. First operand 4542 states and 7000 transitions. Second operand 8 states. [2020-10-28 11:05:27,094 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:27,731 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:05:50,045 INFO L93 Difference]: Finished difference Result 13591 states and 21492 transitions. [2020-10-28 11:05:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:05:50,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 966 [2020-10-28 11:05:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:05:50,106 INFO L225 Difference]: With dead ends: 13591 [2020-10-28 11:05:50,106 INFO L226 Difference]: Without dead ends: 9055 [2020-10-28 11:05:50,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 11:05:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2020-10-28 11:05:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 8883. [2020-10-28 11:05:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-10-28 11:05:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 13853 transitions. [2020-10-28 11:05:50,436 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 13853 transitions. Word has length 966 [2020-10-28 11:05:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:05:50,444 INFO L481 AbstractCegarLoop]: Abstraction has 8883 states and 13853 transitions. [2020-10-28 11:05:50,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 11:05:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 13853 transitions. [2020-10-28 11:05:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2020-10-28 11:05:50,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:05:50,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:05:50,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:05:50,487 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:05:50,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:05:50,488 INFO L82 PathProgramCache]: Analyzing trace with hash 568302298, now seen corresponding path program 1 times [2020-10-28 11:05:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:05:50,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8660301] [2020-10-28 11:05:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:05:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:50,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:55,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:55,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 992 [2020-10-28 11:05:55,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:05:55,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5208 [2020-10-28 11:05:55,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:55,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:55,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:55,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:05:55,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:05:55,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:56,372 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:05:56,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:05:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:56,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:56,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:56,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:05:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:56,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:05:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:56,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:56,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:56,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:05:56,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:56,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 11:05:56,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:56,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:05:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:56,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:05:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:56,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:05:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:56,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:56,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:56,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:05:56,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:56,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 11:05:56,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:56,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:05:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:05:56,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:05:57,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8660301] [2020-10-28 11:05:57,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:05:57,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:05:57,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766355692] [2020-10-28 11:05:57,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:05:57,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:05:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:05:57,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:05:57,132 INFO L87 Difference]: Start difference. First operand 8883 states and 13853 transitions. Second operand 7 states. [2020-10-28 11:05:57,499 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:58,078 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:06:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:06:32,644 INFO L93 Difference]: Finished difference Result 35364 states and 60543 transitions. [2020-10-28 11:06:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:06:32,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 970 [2020-10-28 11:06:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:06:32,821 INFO L225 Difference]: With dead ends: 35364 [2020-10-28 11:06:32,821 INFO L226 Difference]: Without dead ends: 26487 [2020-10-28 11:06:32,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:06:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26487 states. [2020-10-28 11:06:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26487 to 26296. [2020-10-28 11:06:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26296 states. [2020-10-28 11:06:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26296 states to 26296 states and 40644 transitions. [2020-10-28 11:06:33,856 INFO L78 Accepts]: Start accepts. Automaton has 26296 states and 40644 transitions. Word has length 970 [2020-10-28 11:06:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:06:33,857 INFO L481 AbstractCegarLoop]: Abstraction has 26296 states and 40644 transitions. [2020-10-28 11:06:33,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:06:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 26296 states and 40644 transitions. [2020-10-28 11:06:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2020-10-28 11:06:33,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:06:33,985 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:06:33,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:06:33,985 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:06:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:06:33,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1810626506, now seen corresponding path program 1 times [2020-10-28 11:06:33,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:06:33,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681292472] [2020-10-28 11:06:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:06:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:34,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:38,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:39,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:39,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1007 [2020-10-28 11:06:39,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 11:06:39,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5183 [2020-10-28 11:06:39,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:39,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:06:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:06:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 11:06:39,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:39,794 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:06:39,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:06:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:39,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:39,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:39,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:06:39,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:39,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 11:06:39,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:39,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:39,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:06:39,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:06:39,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:06:39,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:39,930 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:06:39,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:06:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:39,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:39,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:39,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:06:39,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:39,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 11:06:39,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:39,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:06:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:06:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:06:39,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:39,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:06:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:39,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:40,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:40,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:06:40,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:40,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 11:06:40,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:40,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:40,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:06:40,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:06:40,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 11:06:40,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:40,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 11:06:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:40,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:40,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:06:40,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 11:06:40,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:40,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:06:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:06:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:06:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 11:06:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681292472] [2020-10-28 11:06:40,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:06:40,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:06:40,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059011012] [2020-10-28 11:06:40,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:06:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:06:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:06:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:06:40,844 INFO L87 Difference]: Start difference. First operand 26296 states and 40644 transitions. Second operand 7 states. [2020-10-28 11:06:41,244 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:06:41,849 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 11:07:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:07:22,861 INFO L93 Difference]: Finished difference Result 106062 states and 182175 transitions. [2020-10-28 11:07:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:07:22,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 983 [2020-10-28 11:07:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:07:23,341 INFO L225 Difference]: With dead ends: 106062 [2020-10-28 11:07:23,342 INFO L226 Difference]: Without dead ends: 79800 [2020-10-28 11:07:23,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:07:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79800 states. [2020-10-28 11:07:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79800 to 79466. [2020-10-28 11:07:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79466 states. [2020-10-28 11:07:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79466 states to 79466 states and 129666 transitions. [2020-10-28 11:07:27,056 INFO L78 Accepts]: Start accepts. Automaton has 79466 states and 129666 transitions. Word has length 983 [2020-10-28 11:07:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:07:27,056 INFO L481 AbstractCegarLoop]: Abstraction has 79466 states and 129666 transitions. [2020-10-28 11:07:27,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:07:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 79466 states and 129666 transitions. [2020-10-28 11:07:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2020-10-28 11:07:27,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:07:27,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:07:27,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:07:27,924 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:07:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:07:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1370042263, now seen corresponding path program 1 times [2020-10-28 11:07:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:07:27,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308478085] [2020-10-28 11:07:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:07:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:28,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:29,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:33,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:33,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1007 [2020-10-28 11:07:33,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:07:33,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5332 [2020-10-28 11:07:33,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:33,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 11:07:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:07:33,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 11:07:33,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:33,792 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:07:33,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:07:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:33,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:33,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:33,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:07:33,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:33,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 11:07:33,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:33,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:33,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:07:33,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:33,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:07:33,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:33,939 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:07:33,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:07:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:33,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:33,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:34,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:34,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 11:07:34,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:07:34,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-28 11:07:34,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:34,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:07:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:07:34,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:34,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 11:07:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:34,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:34,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:34,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:07:34,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:34,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 11:07:34,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:34,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:34,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:34,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:07:34,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 11:07:34,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 11:07:34,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308478085] [2020-10-28 11:07:34,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:07:34,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 11:07:34,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535255731] [2020-10-28 11:07:34,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 11:07:34,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:07:34,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 11:07:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 11:07:34,892 INFO L87 Difference]: Start difference. First operand 79466 states and 129666 transitions. Second operand 9 states. [2020-10-28 11:07:35,167 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:07:36,066 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159