/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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 11:04:14,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 11:04:14,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 11:04:14,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 11:04:14,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 11:04:14,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 11:04:14,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 11:04:14,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 11:04:14,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 11:04:14,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 11:04:14,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 11:04:14,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 11:04:14,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 11:04:14,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 11:04:14,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 11:04:14,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 11:04:14,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 11:04:14,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 11:04:14,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 11:04:14,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 11:04:14,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 11:04:14,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 11:04:14,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 11:04:14,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 11:04:14,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 11:04:14,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 11:04:14,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 11:04:14,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 11:04:14,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 11:04:14,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 11:04:14,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 11:04:14,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 11:04:14,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 11:04:14,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 11:04:14,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 11:04:14,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 11:04:14,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 11:04:14,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 11:04:14,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 11:04:14,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 11:04:14,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 11:04:14,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 11:04:14,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 11:04:14,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 11:04:14,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 11:04:14,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 11:04:14,646 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 11:04:14,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 11:04:14,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 11:04:14,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 11:04:14,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 11:04:14,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 11:04:14,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 11:04:14,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 11:04:14,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 11:04:14,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 11:04:14,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 11:04:14,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 11:04:14,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 11:04:14,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 11:04:14,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 11:04:14,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 11:04:14,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 11:04:14,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:04:14,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 11:04:14,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 11:04:14,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 11:04:14,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 11:04:14,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 11:04:14,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 11:04:14,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 11:04:14,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 11:04:15,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 11:04:15,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 11:04:15,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 11:04:15,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 11:04:15,080 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 11:04:15,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label37.c [2020-10-28 11:04:15,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b008ab55e/e3cb358b76074cf594d2922d7ad2e827/FLAG2d4b6faab [2020-10-28 11:04:16,286 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 11:04:16,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label37.c [2020-10-28 11:04:16,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b008ab55e/e3cb358b76074cf594d2922d7ad2e827/FLAG2d4b6faab [2020-10-28 11:04:16,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b008ab55e/e3cb358b76074cf594d2922d7ad2e827 [2020-10-28 11:04:16,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 11:04:16,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 11:04:16,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 11:04:16,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 11:04:16,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 11:04:16,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:04:16" (1/1) ... [2020-10-28 11:04:16,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c2cc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:16, skipping insertion in model container [2020-10-28 11:04:16,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:04:16" (1/1) ... [2020-10-28 11:04:16,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 11:04:17,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 11:04:19,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:04:19,025 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 11:04:20,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:04:20,204 INFO L208 MainTranslator]: Completed translation [2020-10-28 11:04:20,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20 WrapperNode [2020-10-28 11:04:20,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 11:04:20,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 11:04:20,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 11:04:20,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 11:04:20,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... [2020-10-28 11:04:20,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... [2020-10-28 11:04:20,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... [2020-10-28 11:04:20,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... [2020-10-28 11:04:20,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... [2020-10-28 11:04:20,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... [2020-10-28 11:04:20,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... [2020-10-28 11:04:20,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 11:04:20,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 11:04:20,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 11:04:20,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 11:04:20,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:04:20,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 11:04:20,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 11:04:20,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 11:04:20,781 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 11:04:20,782 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 11:04:20,782 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 11:04:20,782 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 11:04:20,782 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 11:04:20,782 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 11:04:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 11:04:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 11:04:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 11:04:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 11:04:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 11:04:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 11:04:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 11:04:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 11:04:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 11:04:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 11:04:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 11:04:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 11:04:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 11:04:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 11:04:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 11:04:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 11:04:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 11:04:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 11:04:32,208 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 11:04:32,208 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 11:04:32,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:04:32 BoogieIcfgContainer [2020-10-28 11:04:32,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 11:04:32,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 11:04:32,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 11:04:32,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 11:04:32,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:04:16" (1/3) ... [2020-10-28 11:04:32,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecfd014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:04:32, skipping insertion in model container [2020-10-28 11:04:32,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:04:20" (2/3) ... [2020-10-28 11:04:32,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecfd014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:04:32, skipping insertion in model container [2020-10-28 11:04:32,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:04:32" (3/3) ... [2020-10-28 11:04:32,222 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label37.c [2020-10-28 11:04:32,235 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 11:04:32,242 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 11:04:32,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 11:04:32,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 11:04:32,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 11:04:32,293 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 11:04:32,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 11:04:32,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 11:04:32,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 11:04:32,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 11:04:32,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 11:04:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 11:04:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2020-10-28 11:04:32,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:04:32,415 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] [2020-10-28 11:04:32,416 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:04:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:04:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1900116780, now seen corresponding path program 1 times [2020-10-28 11:04:32,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:04:32,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387107299] [2020-10-28 11:04:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:04:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:38,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:38,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 973 [2020-10-28 11:04:38,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:04:38,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 11:04:38,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:38,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:38,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 11:04:38,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:04:38,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 964 [2020-10-28 11:04:38,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 11:04:40,443 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:04:40,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:04:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:40,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:40,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:40,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:04:40,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:40,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 11:04:40,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:40,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:40,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:04:40,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:04:40,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:04:40,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:04:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:04:41,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387107299] [2020-10-28 11:04:41,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:04:41,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 11:04:41,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411783841] [2020-10-28 11:04:41,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 11:04:41,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:04:41,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 11:04:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 11:04:41,811 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 11:04:42,292 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:05:04,890 INFO L93 Difference]: Finished difference Result 3770 states and 7012 transitions. [2020-10-28 11:05:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 11:05:04,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 955 [2020-10-28 11:05:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:05:04,947 INFO L225 Difference]: With dead ends: 3770 [2020-10-28 11:05:04,947 INFO L226 Difference]: Without dead ends: 2387 [2020-10-28 11:05:04,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 11:05:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-28 11:05:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2374. [2020-10-28 11:05:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-10-28 11:05:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3972 transitions. [2020-10-28 11:05:05,163 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3972 transitions. Word has length 955 [2020-10-28 11:05:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:05:05,166 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3972 transitions. [2020-10-28 11:05:05,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 11:05:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3972 transitions. [2020-10-28 11:05:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2020-10-28 11:05:05,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:05:05,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:05:05,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 11:05:05,213 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:05:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:05:05,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1261692795, now seen corresponding path program 1 times [2020-10-28 11:05:05,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:05:05,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423858613] [2020-10-28 11:05:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:05:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:07,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:10,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:10,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 987 [2020-10-28 11:05:10,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:05:10,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-28 11:05:10,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:10,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:05:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:05:10,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 11:05:10,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:05:11,063 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:05:11,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:05:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:11,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:11,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:11,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:05:11,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:11,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 11:05:11,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:11,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:11,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:05:11,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:11,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:05:11,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:11,275 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:05:11,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:05:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:11,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:11,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:11,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:05:11,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:11,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 11:05:11,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:11,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:05:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:05:11,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:05:12,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423858613] [2020-10-28 11:05:12,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:05:12,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:05:12,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588912807] [2020-10-28 11:05:12,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:05:12,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:05:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:05:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:05:12,184 INFO L87 Difference]: Start difference. First operand 2374 states and 3972 transitions. Second operand 7 states. [2020-10-28 11:05:12,701 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:14,385 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:05:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:05:40,955 INFO L93 Difference]: Finished difference Result 6954 states and 11751 transitions. [2020-10-28 11:05:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 11:05:40,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 967 [2020-10-28 11:05:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:05:40,989 INFO L225 Difference]: With dead ends: 6954 [2020-10-28 11:05:40,990 INFO L226 Difference]: Without dead ends: 4586 [2020-10-28 11:05:40,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:05:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2020-10-28 11:05:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4542. [2020-10-28 11:05:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2020-10-28 11:05:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 7000 transitions. [2020-10-28 11:05:41,151 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 7000 transitions. Word has length 967 [2020-10-28 11:05:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:05:41,152 INFO L481 AbstractCegarLoop]: Abstraction has 4542 states and 7000 transitions. [2020-10-28 11:05:41,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:05:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 7000 transitions. [2020-10-28 11:05:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2020-10-28 11:05:41,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:05:41,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:05:41,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:05:41,175 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:05:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:05:41,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1037732541, now seen corresponding path program 1 times [2020-10-28 11:05:41,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:05:41,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611187845] [2020-10-28 11:05:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:05:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:41,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:43,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:46,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:46,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 991 [2020-10-28 11:05:46,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:05:46,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-28 11:05:46,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:46,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:05:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:05:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:05:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:46,982 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:05:46,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:05:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:46,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:47,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:47,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:05:47,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:47,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 11:05:47,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:47,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:47,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:05:47,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:47,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:05:47,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:05:47,211 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:05:47,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:05:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:47,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:47,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:47,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:05:47,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:47,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 11:05:47,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:47,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:47,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:05:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 11:05:47,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:05:48,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611187845] [2020-10-28 11:05:48,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:05:48,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:05:48,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356008732] [2020-10-28 11:05:48,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:05:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:05:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:05:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:05:48,081 INFO L87 Difference]: Start difference. First operand 4542 states and 7000 transitions. Second operand 7 states. [2020-10-28 11:05:48,554 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:05:49,417 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:06:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:06:20,930 INFO L93 Difference]: Finished difference Result 13740 states and 22171 transitions. [2020-10-28 11:06:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:06:20,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 971 [2020-10-28 11:06:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:06:20,997 INFO L225 Difference]: With dead ends: 13740 [2020-10-28 11:06:20,998 INFO L226 Difference]: Without dead ends: 9204 [2020-10-28 11:06:21,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:06:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2020-10-28 11:06:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 8974. [2020-10-28 11:06:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2020-10-28 11:06:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 13092 transitions. [2020-10-28 11:06:21,367 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 13092 transitions. Word has length 971 [2020-10-28 11:06:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:06:21,368 INFO L481 AbstractCegarLoop]: Abstraction has 8974 states and 13092 transitions. [2020-10-28 11:06:21,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:06:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 13092 transitions. [2020-10-28 11:06:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2020-10-28 11:06:21,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:06:21,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:06:21,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:06:21,434 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:06:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:06:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash -97461991, now seen corresponding path program 1 times [2020-10-28 11:06:21,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:06:21,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794997870] [2020-10-28 11:06:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:06:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:21,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:21,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:26,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:26,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1009 [2020-10-28 11:06:26,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:06:26,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5214 [2020-10-28 11:06:26,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:26,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:06:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:06:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:06:26,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 11:06:27,471 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:06:27,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:06:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:27,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:27,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:06:27,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:27,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 11:06:27,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:27,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:06:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:06:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:06:27,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:27,690 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:06:27,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:06:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:27,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:27,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:06:27,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:27,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-28 11:06:27,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:27,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:27,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:06:27,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:06:27,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 11:06:27,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:27,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 11:06:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:27,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:27,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:27,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:06:27,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 11:06:27,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:27,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:06:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 11:06:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:06:27,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 11:06:28,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794997870] [2020-10-28 11:06:28,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:06:28,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:06:28,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141887424] [2020-10-28 11:06:28,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:06:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:06:28,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:06:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:06:28,425 INFO L87 Difference]: Start difference. First operand 8974 states and 13092 transitions. Second operand 7 states. [2020-10-28 11:06:28,920 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:06:31,938 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:06:58,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:06:58,119 INFO L93 Difference]: Finished difference Result 27858 states and 42583 transitions. [2020-10-28 11:06:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:06:58,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 987 [2020-10-28 11:06:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:06:58,203 INFO L225 Difference]: With dead ends: 27858 [2020-10-28 11:06:58,203 INFO L226 Difference]: Without dead ends: 18890 [2020-10-28 11:06:58,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:06:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18890 states. [2020-10-28 11:06:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18890 to 18522. [2020-10-28 11:06:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18522 states. [2020-10-28 11:06:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18522 states to 18522 states and 26247 transitions. [2020-10-28 11:06:58,797 INFO L78 Accepts]: Start accepts. Automaton has 18522 states and 26247 transitions. Word has length 987 [2020-10-28 11:06:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:06:58,797 INFO L481 AbstractCegarLoop]: Abstraction has 18522 states and 26247 transitions. [2020-10-28 11:06:58,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:06:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18522 states and 26247 transitions. [2020-10-28 11:06:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2020-10-28 11:06:58,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:06:58,871 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:06:58,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:06:58,871 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:06:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:06:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -30880939, now seen corresponding path program 1 times [2020-10-28 11:06:58,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:06:58,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967116308] [2020-10-28 11:06:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:06:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:59,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:03,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:04,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:04,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1056 [2020-10-28 11:07:04,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:07:04,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-28 11:07:04,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:04,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:04,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:04,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 11:07:04,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 11:07:04,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:04,794 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:07:04,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:07:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:04,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:04,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:04,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:07:04,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:07:04,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:04,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:07:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:07:04,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:04,995 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:07:04,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:07:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:05,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:05,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:07:05,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:05,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 11:07:05,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:05,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:05,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:07:05,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:05,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:07:05,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:05,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:07:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:05,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:05,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:05,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:07:05,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:05,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 11:07:05,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:05,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:07:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:07:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:05,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 11:07:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:05,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:05,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:05,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 11:07:05,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:05,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 11:07:05,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:05,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:07:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 11:07:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 11:07:06,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967116308] [2020-10-28 11:07:06,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:07:06,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:07:06,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905089402] [2020-10-28 11:07:06,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:07:06,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:07:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:07:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:07:06,064 INFO L87 Difference]: Start difference. First operand 18522 states and 26247 transitions. Second operand 7 states. [2020-10-28 11:07:06,990 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 11:07:07,809 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:07:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:07:36,814 INFO L93 Difference]: Finished difference Result 47781 states and 75318 transitions. [2020-10-28 11:07:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:07:36,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1032 [2020-10-28 11:07:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:07:36,977 INFO L225 Difference]: With dead ends: 47781 [2020-10-28 11:07:36,977 INFO L226 Difference]: Without dead ends: 29265 [2020-10-28 11:07:37,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:07:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29265 states. [2020-10-28 11:07:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29265 to 28546. [2020-10-28 11:07:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28546 states. [2020-10-28 11:07:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28546 states to 28546 states and 40292 transitions. [2020-10-28 11:07:38,385 INFO L78 Accepts]: Start accepts. Automaton has 28546 states and 40292 transitions. Word has length 1032 [2020-10-28 11:07:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:07:38,385 INFO L481 AbstractCegarLoop]: Abstraction has 28546 states and 40292 transitions. [2020-10-28 11:07:38,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:07:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 28546 states and 40292 transitions. [2020-10-28 11:07:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2020-10-28 11:07:38,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:07:38,498 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:07:38,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:07:38,499 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:07:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:07:38,500 INFO L82 PathProgramCache]: Analyzing trace with hash 16268939, now seen corresponding path program 1 times [2020-10-28 11:07:38,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:07:38,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139726649] [2020-10-28 11:07:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:07:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:38,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:41,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:43,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:43,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1061 [2020-10-28 11:07:43,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:07:43,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-28 11:07:43,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:43,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:43,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:07:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:07:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 11:07:43,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:44,353 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:07:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:07:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:44,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:07:44,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:44,571 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:07:44,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:07:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:44,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:44,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:44,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 11:07:44,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:44,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 11:07:44,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:44,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:07:44,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 11:07:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:07:45,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139726649] [2020-10-28 11:07:45,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:07:45,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:07:45,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370477929] [2020-10-28 11:07:45,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:07:45,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:07:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:07:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:07:45,470 INFO L87 Difference]: Start difference. First operand 28546 states and 40292 transitions. Second operand 7 states. [2020-10-28 11:07:45,943 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:07:49,014 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 159