/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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:56:10,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:56:10,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:56:10,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:56:10,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:56:10,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:56:10,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:56:10,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:56:10,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:56:10,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:56:10,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:56:10,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:56:10,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:56:10,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:56:10,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:56:10,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:56:10,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:56:10,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:56:10,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:56:10,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:56:10,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:56:10,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:56:10,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:56:10,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:56:10,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:56:10,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:56:10,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:56:10,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:56:10,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:56:10,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:56:10,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:56:10,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:56:10,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:56:10,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:56:10,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:56:10,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:56:10,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:56:10,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:56:10,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:56:10,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:56:10,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:56:10,639 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 10:56:10,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:56:10,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:56:10,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:56:10,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:56:10,695 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:56:10,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:56:10,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:56:10,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:56:10,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:56:10,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:56:10,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:56:10,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:56:10,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:56:10,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:56:10,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:56:10,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:56:10,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:56:10,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:56:10,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:56:10,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:56:10,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:56:10,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:56:10,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:56:10,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:56:10,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:56:10,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:56:10,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:56:10,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:56:10,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:56:10,701 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:56:11,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:56:11,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:56:11,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:56:11,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:56:11,193 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:56:11,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label07.c [2020-10-28 10:56:11,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e500f3d/c79f0d5f76e64358bdf67a76e8c85ffe/FLAG0dd7051a6 [2020-10-28 10:56:12,552 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:56:12,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label07.c [2020-10-28 10:56:12,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e500f3d/c79f0d5f76e64358bdf67a76e8c85ffe/FLAG0dd7051a6 [2020-10-28 10:56:12,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e500f3d/c79f0d5f76e64358bdf67a76e8c85ffe [2020-10-28 10:56:12,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:56:12,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:56:12,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:56:12,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:56:12,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:56:12,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:56:12" (1/1) ... [2020-10-28 10:56:12,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd818d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:12, skipping insertion in model container [2020-10-28 10:56:12,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:56:12" (1/1) ... [2020-10-28 10:56:12,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:56:12,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:56:14,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:56:14,964 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:56:16,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:56:16,313 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:56:16,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16 WrapperNode [2020-10-28 10:56:16,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:56:16,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:56:16,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:56:16,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:56:16,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (1/1) ... [2020-10-28 10:56:16,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (1/1) ... [2020-10-28 10:56:16,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (1/1) ... [2020-10-28 10:56:16,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (1/1) ... [2020-10-28 10:56:16,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (1/1) ... [2020-10-28 10:56:16,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (1/1) ... [2020-10-28 10:56:16,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (1/1) ... [2020-10-28 10:56:16,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:56:16,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:56:16,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:56:16,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:56:16,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (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 10:56:16,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:56:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:56:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:56:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:56:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:56:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:56:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:56:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 10:56:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:56:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:56:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:56:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:56:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:56:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 10:56:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:56:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:56:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:56:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:56:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:56:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:56:25,080 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:56:25,081 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:56:25,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:56:25 BoogieIcfgContainer [2020-10-28 10:56:25,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:56:25,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:56:25,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:56:25,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:56:25,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:56:12" (1/3) ... [2020-10-28 10:56:25,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629de7ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:56:25, skipping insertion in model container [2020-10-28 10:56:25,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:56:16" (2/3) ... [2020-10-28 10:56:25,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629de7ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:56:25, skipping insertion in model container [2020-10-28 10:56:25,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:56:25" (3/3) ... [2020-10-28 10:56:25,098 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label07.c [2020-10-28 10:56:25,110 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:56:25,120 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:56:25,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:56:25,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:56:25,180 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:56:25,180 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:56:25,180 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:56:25,180 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:56:25,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:56:25,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:56:25,181 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:56:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 10:56:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2020-10-28 10:56:25,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:56:25,300 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, 1, 1, 1, 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 10:56:25,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:56:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:56:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1281464492, now seen corresponding path program 1 times [2020-10-28 10:56:25,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:56:25,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020224478] [2020-10-28 10:56:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:56:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:56:26,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:56:29,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:56:31,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:56:31,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 995 [2020-10-28 10:56:31,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:56:31,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 10:56:31,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:56:31,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:56:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 10:56:31,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:56:31,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 986 [2020-10-28 10:56:31,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:56:33,126 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:56:33,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:56:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:56:33,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:56:33,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:56:33,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:56:33,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:56:33,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 10:56:33,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:56:33,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:56:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:56:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:56:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:56:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:56:34,618 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 10:56:34,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020224478] [2020-10-28 10:56:34,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:56:34,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 10:56:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620524921] [2020-10-28 10:56:34,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:56:34,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:56:34,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:56:34,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:56:34,649 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 5 states. [2020-10-28 10:56:35,016 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:56:35,390 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:56:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:56:57,879 INFO L93 Difference]: Finished difference Result 4885 states and 9214 transitions. [2020-10-28 10:56:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:56:57,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 977 [2020-10-28 10:56:57,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:56:57,940 INFO L225 Difference]: With dead ends: 4885 [2020-10-28 10:56:57,940 INFO L226 Difference]: Without dead ends: 3498 [2020-10-28 10:56:57,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:56:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2020-10-28 10:56:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3404. [2020-10-28 10:56:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3404 states. [2020-10-28 10:56:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 5931 transitions. [2020-10-28 10:56:58,210 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 5931 transitions. Word has length 977 [2020-10-28 10:56:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:56:58,214 INFO L481 AbstractCegarLoop]: Abstraction has 3404 states and 5931 transitions. [2020-10-28 10:56:58,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:56:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 5931 transitions. [2020-10-28 10:56:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2020-10-28 10:56:58,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:56:58,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:56:58,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:56:58,267 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:56:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:56:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1830766667, now seen corresponding path program 1 times [2020-10-28 10:56:58,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:56:58,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674034309] [2020-10-28 10:56:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:56:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:56:58,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:00,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:03,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:03,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1005 [2020-10-28 10:57:03,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:57:03,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5238 [2020-10-28 10:57:03,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:03,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:03,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:57:03,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:57:03,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:57:03,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:57:04,043 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:57:04,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:57:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:04,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:04,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:04,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:57:04,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:57:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:57:04,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:04,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:04,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:57:04,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:57:04,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:57:04,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:57:04,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:57:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:04,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:04,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:04,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 10:57:04,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:57:04,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:57:04,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:04,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:04,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:57:04,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:57:04,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:57:04,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:57:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:57:04,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674034309] [2020-10-28 10:57:04,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:57:04,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:57:04,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909516649] [2020-10-28 10:57:04,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:57:04,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:57:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:57:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:57:04,828 INFO L87 Difference]: Start difference. First operand 3404 states and 5931 transitions. Second operand 7 states. [2020-10-28 10:57:05,031 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:57:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:57:24,315 INFO L93 Difference]: Finished difference Result 10323 states and 18095 transitions. [2020-10-28 10:57:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 10:57:24,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 985 [2020-10-28 10:57:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:57:24,362 INFO L225 Difference]: With dead ends: 10323 [2020-10-28 10:57:24,363 INFO L226 Difference]: Without dead ends: 6925 [2020-10-28 10:57:24,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 10:57:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2020-10-28 10:57:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6871. [2020-10-28 10:57:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6871 states. [2020-10-28 10:57:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6871 states to 6871 states and 11982 transitions. [2020-10-28 10:57:24,679 INFO L78 Accepts]: Start accepts. Automaton has 6871 states and 11982 transitions. Word has length 985 [2020-10-28 10:57:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:57:24,679 INFO L481 AbstractCegarLoop]: Abstraction has 6871 states and 11982 transitions. [2020-10-28 10:57:24,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:57:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6871 states and 11982 transitions. [2020-10-28 10:57:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2020-10-28 10:57:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:57:24,710 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:57:24,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:57:24,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:57:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:57:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1357099038, now seen corresponding path program 1 times [2020-10-28 10:57:24,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:57:24,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360207776] [2020-10-28 10:57:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:57:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:26,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:29,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:29,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1012 [2020-10-28 10:57:29,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:57:29,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-28 10:57:29,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:29,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:29,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:57:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:57:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:57:29,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:57:30,319 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:57:30,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:57:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:30,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:30,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:57:30,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:57:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:57:30,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:30,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:57:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:57:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:57:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:57:30,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:57:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:30,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:30,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:30,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:57:30,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:57:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:57:31,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360207776] [2020-10-28 10:57:31,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:57:31,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:57:31,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856466390] [2020-10-28 10:57:31,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:57:31,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:57:31,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:57:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:57:31,213 INFO L87 Difference]: Start difference. First operand 6871 states and 11982 transitions. Second operand 7 states. [2020-10-28 10:57:31,412 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:57:32,305 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:57:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:57:50,036 INFO L93 Difference]: Finished difference Result 20818 states and 37174 transitions. [2020-10-28 10:57:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:57:50,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 992 [2020-10-28 10:57:50,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:57:50,119 INFO L225 Difference]: With dead ends: 20818 [2020-10-28 10:57:50,119 INFO L226 Difference]: Without dead ends: 13953 [2020-10-28 10:57:50,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:57:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13953 states. [2020-10-28 10:57:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13953 to 13598. [2020-10-28 10:57:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13598 states. [2020-10-28 10:57:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13598 states to 13598 states and 21886 transitions. [2020-10-28 10:57:50,650 INFO L78 Accepts]: Start accepts. Automaton has 13598 states and 21886 transitions. Word has length 992 [2020-10-28 10:57:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:57:50,654 INFO L481 AbstractCegarLoop]: Abstraction has 13598 states and 21886 transitions. [2020-10-28 10:57:50,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:57:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 13598 states and 21886 transitions. [2020-10-28 10:57:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2020-10-28 10:57:50,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:57:50,714 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:57:50,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:57:50,714 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:57:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:57:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash -403762982, now seen corresponding path program 1 times [2020-10-28 10:57:50,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:57:50,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920273392] [2020-10-28 10:57:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:57:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:52,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:55,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:55,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1025 [2020-10-28 10:57:55,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:57:55,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-28 10:57:55,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:55,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:55,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:57:55,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:57:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 10:57:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:57:56,396 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:57:56,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:57:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:56,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:56,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:56,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:57:56,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:57:56,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:57:56,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:56,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:57:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:57:56,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:57:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:57:56,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:57:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:57:56,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:57:56,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:57:56,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:57:56,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:57:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 10:57:56,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:57:56,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:57:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:57:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:57:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:57:56,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:57:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:57:57,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920273392] [2020-10-28 10:57:57,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:57:57,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:57:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666230272] [2020-10-28 10:57:57,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:57:57,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:57:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:57:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:57:57,204 INFO L87 Difference]: Start difference. First operand 13598 states and 21886 transitions. Second operand 7 states. [2020-10-28 10:57:57,431 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:57:58,735 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:58:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:58:18,472 INFO L93 Difference]: Finished difference Result 41018 states and 69019 transitions. [2020-10-28 10:58:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:58:18,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1005 [2020-10-28 10:58:18,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:58:18,607 INFO L225 Difference]: With dead ends: 41018 [2020-10-28 10:58:18,607 INFO L226 Difference]: Without dead ends: 27426 [2020-10-28 10:58:18,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:58:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27426 states. [2020-10-28 10:58:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27426 to 27155. [2020-10-28 10:58:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27155 states. [2020-10-28 10:58:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27155 states to 27155 states and 43213 transitions. [2020-10-28 10:58:19,581 INFO L78 Accepts]: Start accepts. Automaton has 27155 states and 43213 transitions. Word has length 1005 [2020-10-28 10:58:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:58:19,582 INFO L481 AbstractCegarLoop]: Abstraction has 27155 states and 43213 transitions. [2020-10-28 10:58:19,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:58:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 27155 states and 43213 transitions. [2020-10-28 10:58:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2020-10-28 10:58:19,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:58:19,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:58:19,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:58:19,879 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:58:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:58:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash 744104324, now seen corresponding path program 1 times [2020-10-28 10:58:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:58:19,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206762961] [2020-10-28 10:58:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:58:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:20,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:21,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:25,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:25,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1037 [2020-10-28 10:58:25,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:58:25,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5273 [2020-10-28 10:58:25,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:25,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:25,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:58:25,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:58:25,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 10:58:25,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:58:26,138 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:58:26,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:58:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:26,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:26,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:58:26,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:26,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:58:26,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:26,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:26,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:58:26,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:58:26,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:58:26,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:58:26,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:58:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:26,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:26,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 10:58:26,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:26,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 10:58:26,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:26,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:26,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:58:26,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:58:26,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:58:26,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:58:26,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 10:58:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:26,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:26,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:26,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 10:58:26,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:26,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 10:58:26,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:26,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:58:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 10:58:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:58:26,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:58:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:58:27,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206762961] [2020-10-28 10:58:27,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:58:27,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:58:27,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084329838] [2020-10-28 10:58:27,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:58:27,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:58:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:58:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:58:27,662 INFO L87 Difference]: Start difference. First operand 27155 states and 43213 transitions. Second operand 7 states. [2020-10-28 10:58:27,893 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:58:28,993 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 10:58:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:58:51,137 INFO L93 Difference]: Finished difference Result 82901 states and 142327 transitions. [2020-10-28 10:58:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:58:51,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1015 [2020-10-28 10:58:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:58:51,393 INFO L225 Difference]: With dead ends: 82901 [2020-10-28 10:58:51,393 INFO L226 Difference]: Without dead ends: 55752 [2020-10-28 10:58:51,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 10:58:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55752 states. [2020-10-28 10:58:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55752 to 54418. [2020-10-28 10:58:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54418 states. [2020-10-28 10:58:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54418 states to 54418 states and 86242 transitions. [2020-10-28 10:58:53,376 INFO L78 Accepts]: Start accepts. Automaton has 54418 states and 86242 transitions. Word has length 1015 [2020-10-28 10:58:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:58:53,377 INFO L481 AbstractCegarLoop]: Abstraction has 54418 states and 86242 transitions. [2020-10-28 10:58:53,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:58:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 54418 states and 86242 transitions. [2020-10-28 10:58:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2020-10-28 10:58:53,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:58:53,943 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:58:53,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:58:53,944 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:58:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:58:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -351541367, now seen corresponding path program 1 times [2020-10-28 10:58:53,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:58:53,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456757494] [2020-10-28 10:58:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:58:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:54,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:55,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:57,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:59,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:59,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1043 [2020-10-28 10:58:59,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:58:59,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-28 10:58:59,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:59,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:59,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:58:59,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 10:58:59,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:58:59,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:58:59,684 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:58:59,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:58:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:59,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:59,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:59,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:58:59,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:58:59,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:59,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:59,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:58:59,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:58:59,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:58:59,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:58:59,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:58:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:59,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:59,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:58:59,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:59,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:58:59,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:59,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:58:59,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:58:59,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:58:59,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:58:59,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 10:58:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:59,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:59,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:58:59,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:59,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 10:58:59,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:59,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:58:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:58:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:58:59,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:59:00,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456757494] [2020-10-28 10:59:00,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:59:00,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:59:00,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743947786] [2020-10-28 10:59:00,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:59:00,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:59:00,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:59:00,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:59:00,449 INFO L87 Difference]: Start difference. First operand 54418 states and 86242 transitions. Second operand 7 states. [2020-10-28 10:59:00,743 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:59:01,994 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:59:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:59:24,283 INFO L93 Difference]: Finished difference Result 165245 states and 313751 transitions. [2020-10-28 10:59:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:59:24,284 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1021 [2020-10-28 10:59:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:59:24,950 INFO L225 Difference]: With dead ends: 165245 [2020-10-28 10:59:24,950 INFO L226 Difference]: Without dead ends: 110833 [2020-10-28 10:59:25,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:59:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110833 states. [2020-10-28 10:59:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110833 to 109086. [2020-10-28 10:59:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109086 states. [2020-10-28 10:59:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109086 states to 109086 states and 172711 transitions. [2020-10-28 10:59:30,854 INFO L78 Accepts]: Start accepts. Automaton has 109086 states and 172711 transitions. Word has length 1021 [2020-10-28 10:59:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:59:30,855 INFO L481 AbstractCegarLoop]: Abstraction has 109086 states and 172711 transitions. [2020-10-28 10:59:30,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:59:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 109086 states and 172711 transitions. [2020-10-28 10:59:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2020-10-28 10:59:31,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:59:31,354 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:59:31,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:59:31,355 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:59:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:59:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash -310626389, now seen corresponding path program 1 times [2020-10-28 10:59:31,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:59:31,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787198103] [2020-10-28 10:59:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:59:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:32,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:37,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:37,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1051 [2020-10-28 10:59:37,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:59:37,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5289 [2020-10-28 10:59:37,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:37,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:37,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:59:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:59:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:59:37,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:37,491 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:59:37,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:59:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:37,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:37,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:37,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:59:37,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:37,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:59:37,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:37,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:59:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:59:37,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:59:37,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:37,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:59:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:37,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:37,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:37,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:59:37,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:37,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:59:37,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:37,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:37,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:59:37,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:59:37,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 10:59:37,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:37,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:59:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:37,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:37,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:37,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 10:59:37,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:37,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:59:37,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:37,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:37,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:59:37,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 10:59:37,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:59:37,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:37,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 10:59:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:37,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:37,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 10:59:37,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:37,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:59:37,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:37,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:59:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 10:59:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:59:37,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-28 10:59:38,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787198103] [2020-10-28 10:59:38,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:59:38,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:59:38,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714288352] [2020-10-28 10:59:38,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:59:38,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:59:38,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:59:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:59:38,557 INFO L87 Difference]: Start difference. First operand 109086 states and 172711 transitions. Second operand 7 states. [2020-10-28 10:59:38,769 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:59:40,193 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 163