/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=SHALLOWEST --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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:39:54,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:39:54,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:39:54,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:39:54,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:39:54,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:39:54,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:39:54,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:39:54,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:39:54,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:39:54,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:39:54,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:39:54,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:39:54,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:39:54,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:39:54,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:39:54,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:39:54,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:39:54,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:39:54,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:39:54,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:39:54,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:39:54,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:39:54,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:39:54,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:39:54,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:39:54,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:39:54,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:39:54,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:39:54,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:39:54,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:39:54,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:39:54,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:39:54,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:39:54,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:39:54,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:39:54,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:39:54,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:39:54,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:39:54,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:39:54,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:39:54,572 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 [2020-10-26 21:39:54,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:39:54,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:39:54,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:39:54,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:39:54,631 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:39:54,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:39:54,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:39:54,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:39:54,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:39:54,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:39:54,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:39:54,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:39:54,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:39:54,636 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:39:54,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:39:54,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:39:54,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:39:54,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:39:54,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:39:54,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:39:54,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:39:54,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:39:54,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:39:54,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:39:54,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:39:54,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:39:54,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:39:54,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:39:54,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:39:54,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:39:55,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:39:55,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:39:55,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:39:55,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:39:55,088 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:39:55,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label53.c [2020-10-26 21:39:55,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9031ac6eb/0cce6cd956cc456f8f8cce8d659b85ce/FLAGcd417e6fa [2020-10-26 21:39:56,448 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:39:56,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label53.c [2020-10-26 21:39:56,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9031ac6eb/0cce6cd956cc456f8f8cce8d659b85ce/FLAGcd417e6fa [2020-10-26 21:39:56,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9031ac6eb/0cce6cd956cc456f8f8cce8d659b85ce [2020-10-26 21:39:56,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:39:56,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:39:56,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:39:56,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:39:56,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:39:56,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:39:56" (1/1) ... [2020-10-26 21:39:56,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be277ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:56, skipping insertion in model container [2020-10-26 21:39:56,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:39:56" (1/1) ... [2020-10-26 21:39:56,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:39:57,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:39:59,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:39:59,344 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:40:00,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:40:00,480 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:40:00,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00 WrapperNode [2020-10-26 21:40:00,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:40:00,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:40:00,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:40:00,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:40:00,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (1/1) ... [2020-10-26 21:40:00,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (1/1) ... [2020-10-26 21:40:00,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (1/1) ... [2020-10-26 21:40:00,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (1/1) ... [2020-10-26 21:40:00,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (1/1) ... [2020-10-26 21:40:00,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (1/1) ... [2020-10-26 21:40:00,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (1/1) ... [2020-10-26 21:40:00,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:40:00,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:40:00,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:40:00,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:40:00,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (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 [2020-10-26 21:40:01,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:40:01,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:40:01,150 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:40:01,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:40:01,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:40:01,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:40:01,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:40:01,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:40:01,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:40:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:40:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:40:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:40:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:40:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:40:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:40:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:40:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:40:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:40:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:40:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:40:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:40:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:40:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:40:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:40:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:40:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:40:01,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:40:08,833 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:40:08,834 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:40:08,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:40:08 BoogieIcfgContainer [2020-10-26 21:40:08,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:40:08,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:40:08,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:40:08,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:40:08,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:39:56" (1/3) ... [2020-10-26 21:40:08,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45be9174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:40:08, skipping insertion in model container [2020-10-26 21:40:08,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:00" (2/3) ... [2020-10-26 21:40:08,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45be9174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:40:08, skipping insertion in model container [2020-10-26 21:40:08,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:40:08" (3/3) ... [2020-10-26 21:40:08,852 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label53.c [2020-10-26 21:40:08,867 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:40:08,874 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:40:08,889 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:40:08,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:40:08,943 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:40:08,943 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:40:08,943 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:40:08,943 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:40:08,944 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:40:08,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:40:08,944 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:40:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:40:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2020-10-26 21:40:09,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:40:09,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:40:09,079 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:40:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:40:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1432387988, now seen corresponding path program 1 times [2020-10-26 21:40:09,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:40:09,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318838204] [2020-10-26 21:40:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:40:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:10,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:12,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:15,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1021 [2020-10-26 21:40:15,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:40:15,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-26 21:40:15,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 21:40:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:40:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1012 [2020-10-26 21:40:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:40:17,120 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:40:17,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:40:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:17,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:17,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:40:17,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:17,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 21:40:17,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:40:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:40:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:40:17,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:40:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:40:18,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318838204] [2020-10-26 21:40:18,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:40:18,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 21:40:18,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548208927] [2020-10-26 21:40:18,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 21:40:18,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:40:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 21:40:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 21:40:18,828 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-26 21:40:19,059 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:40:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:40:35,709 INFO L93 Difference]: Finished difference Result 3770 states and 7012 transitions. [2020-10-26 21:40:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:40:35,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1003 [2020-10-26 21:40:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:40:35,771 INFO L225 Difference]: With dead ends: 3770 [2020-10-26 21:40:35,772 INFO L226 Difference]: Without dead ends: 2387 [2020-10-26 21:40:35,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:40:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-26 21:40:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2374. [2020-10-26 21:40:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-10-26 21:40:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3972 transitions. [2020-10-26 21:40:36,002 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3972 transitions. Word has length 1003 [2020-10-26 21:40:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:40:36,005 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3972 transitions. [2020-10-26 21:40:36,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 21:40:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3972 transitions. [2020-10-26 21:40:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2020-10-26 21:40:36,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:40:36,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:40:36,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:40:36,051 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:40:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:40:36,053 INFO L82 PathProgramCache]: Analyzing trace with hash -745711045, now seen corresponding path program 1 times [2020-10-26 21:40:36,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:40:36,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723017254] [2020-10-26 21:40:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:40:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:36,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:39,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:41,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:41,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1035 [2020-10-26 21:40:41,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:40:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 21:40:41,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:41,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:40:41,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:40:41,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 21:40:41,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:40:42,043 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:40:42,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:40:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:42,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:42,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:42,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:40:42,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:42,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:40:42,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:42,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:40:42,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:40:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:40:42,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:40:42,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:40:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:42,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:42,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:42,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:40:42,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:42,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 21:40:42,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:42,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:40:42,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:40:42,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 21:40:42,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:40:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:40:43,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723017254] [2020-10-26 21:40:43,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:40:43,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:40:43,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934958435] [2020-10-26 21:40:43,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:40:43,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:40:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:40:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:40:43,052 INFO L87 Difference]: Start difference. First operand 2374 states and 3972 transitions. Second operand 7 states. [2020-10-26 21:40:43,364 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:40:43,881 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 21:41:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:41:16,661 INFO L93 Difference]: Finished difference Result 9193 states and 15699 transitions. [2020-10-26 21:41:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:41:16,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1015 [2020-10-26 21:41:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:41:16,714 INFO L225 Difference]: With dead ends: 9193 [2020-10-26 21:41:16,715 INFO L226 Difference]: Without dead ends: 6825 [2020-10-26 21:41:16,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:41:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6825 states. [2020-10-26 21:41:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 6784. [2020-10-26 21:41:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6784 states. [2020-10-26 21:41:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6784 states to 6784 states and 10052 transitions. [2020-10-26 21:41:17,073 INFO L78 Accepts]: Start accepts. Automaton has 6784 states and 10052 transitions. Word has length 1015 [2020-10-26 21:41:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:41:17,073 INFO L481 AbstractCegarLoop]: Abstraction has 6784 states and 10052 transitions. [2020-10-26 21:41:17,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:41:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6784 states and 10052 transitions. [2020-10-26 21:41:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2020-10-26 21:41:17,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:41:17,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:41:17,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:41:17,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:41:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:41:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash -14067046, now seen corresponding path program 1 times [2020-10-26 21:41:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:41:17,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512927572] [2020-10-26 21:41:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:41:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:17,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:22,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:22,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1045 [2020-10-26 21:41:22,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:41:22,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-26 21:41:22,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:41:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:41:22,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:41:22,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:23,042 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:41:23,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:41:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:23,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:23,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:23,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:41:23,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 21:41:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:41:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:41:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:41:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:23,201 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:41:23,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:41:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:23,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:23,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:23,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:41:23,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:23,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:41:23,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:41:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:41:23,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:41:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:23,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-26 21:41:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:23,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:23,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:41:23,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:23,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 21:41:23,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:23,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:41:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:41:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:41:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:41:23,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512927572] [2020-10-26 21:41:23,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:41:23,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:41:23,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146432626] [2020-10-26 21:41:23,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:41:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:41:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:41:23,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:41:23,961 INFO L87 Difference]: Start difference. First operand 6784 states and 10052 transitions. Second operand 7 states. [2020-10-26 21:41:24,241 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:41:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:41:46,182 INFO L93 Difference]: Finished difference Result 20479 states and 30798 transitions. [2020-10-26 21:41:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 21:41:46,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1023 [2020-10-26 21:41:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:41:46,261 INFO L225 Difference]: With dead ends: 20479 [2020-10-26 21:41:46,262 INFO L226 Difference]: Without dead ends: 13701 [2020-10-26 21:41:46,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 21:41:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13701 states. [2020-10-26 21:41:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13701 to 13654. [2020-10-26 21:41:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13654 states. [2020-10-26 21:41:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13654 states to 13654 states and 20495 transitions. [2020-10-26 21:41:46,749 INFO L78 Accepts]: Start accepts. Automaton has 13654 states and 20495 transitions. Word has length 1023 [2020-10-26 21:41:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:41:46,749 INFO L481 AbstractCegarLoop]: Abstraction has 13654 states and 20495 transitions. [2020-10-26 21:41:46,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:41:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 13654 states and 20495 transitions. [2020-10-26 21:41:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2020-10-26 21:41:46,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:41:46,809 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:41:46,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:41:46,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:41:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:41:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -345050943, now seen corresponding path program 1 times [2020-10-26 21:41:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:41:46,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13882803] [2020-10-26 21:41:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:41:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:46,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:47,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:52,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:52,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1062 [2020-10-26 21:41:52,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:41:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-26 21:41:52,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:41:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:41:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 21:41:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:52,494 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:41:52,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:41:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:52,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:52,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:41:52,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:41:52,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:41:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:41:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:41:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:52,752 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:41:52,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:41:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:52,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:52,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:52,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 21:41:52,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:52,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 21:41:52,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:41:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:41:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 21:41:52,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:52,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 21:41:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:53,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:53,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:41:53,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 21:41:53,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:41:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:41:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:41:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:41:53,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13882803] [2020-10-26 21:41:53,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:41:53,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:41:53,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790013234] [2020-10-26 21:41:53,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:41:53,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:41:53,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:41:53,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:41:53,657 INFO L87 Difference]: Start difference. First operand 13654 states and 20495 transitions. Second operand 7 states. [2020-10-26 21:41:53,942 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:41:55,354 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 21:42:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:42:19,235 INFO L93 Difference]: Finished difference Result 39091 states and 60200 transitions. [2020-10-26 21:42:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:42:19,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1040 [2020-10-26 21:42:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:42:19,368 INFO L225 Difference]: With dead ends: 39091 [2020-10-26 21:42:19,368 INFO L226 Difference]: Without dead ends: 25443 [2020-10-26 21:42:19,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:42:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25443 states. [2020-10-26 21:42:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25443 to 24995. [2020-10-26 21:42:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24995 states. [2020-10-26 21:42:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 35790 transitions. [2020-10-26 21:42:20,158 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 35790 transitions. Word has length 1040 [2020-10-26 21:42:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:42:20,159 INFO L481 AbstractCegarLoop]: Abstraction has 24995 states and 35790 transitions. [2020-10-26 21:42:20,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:42:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 35790 transitions. [2020-10-26 21:42:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2020-10-26 21:42:20,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:42:20,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:42:20,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:42:20,249 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:42:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:42:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1523675127, now seen corresponding path program 1 times [2020-10-26 21:42:20,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:42:20,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884598571] [2020-10-26 21:42:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:42:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:20,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:22,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:25,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:25,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1067 [2020-10-26 21:42:25,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:42:25,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5351 [2020-10-26 21:42:25,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:25,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:42:25,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:42:25,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 21:42:25,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:42:26,226 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:42:26,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:42:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:26,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:26,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:26,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:42:26,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:26,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:42:26,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:42:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:42:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:42:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:26,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:42:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:26,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:26,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:26,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 21:42:26,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:26,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 21:42:26,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:42:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:42:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 21:42:26,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:42:27,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884598571] [2020-10-26 21:42:27,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:42:27,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:42:27,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751522523] [2020-10-26 21:42:27,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:42:27,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:42:27,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:42:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:42:27,107 INFO L87 Difference]: Start difference. First operand 24995 states and 35790 transitions. Second operand 7 states. [2020-10-26 21:42:27,363 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:42:28,734 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 21:42:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:42:47,684 INFO L93 Difference]: Finished difference Result 71112 states and 107483 transitions. [2020-10-26 21:42:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 21:42:47,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1047 [2020-10-26 21:42:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:42:47,872 INFO L225 Difference]: With dead ends: 71112 [2020-10-26 21:42:47,872 INFO L226 Difference]: Without dead ends: 46123 [2020-10-26 21:42:47,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:42:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46123 states. [2020-10-26 21:42:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46123 to 45742. [2020-10-26 21:42:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45742 states. [2020-10-26 21:42:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45742 states to 45742 states and 64913 transitions. [2020-10-26 21:42:49,446 INFO L78 Accepts]: Start accepts. Automaton has 45742 states and 64913 transitions. Word has length 1047 [2020-10-26 21:42:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:42:49,447 INFO L481 AbstractCegarLoop]: Abstraction has 45742 states and 64913 transitions. [2020-10-26 21:42:49,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:42:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 45742 states and 64913 transitions. [2020-10-26 21:42:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1058 [2020-10-26 21:42:49,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:42:49,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:42:49,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:42:49,856 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:42:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:42:49,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1305817819, now seen corresponding path program 1 times [2020-10-26 21:42:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:42:49,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806314181] [2020-10-26 21:42:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:42:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:50,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:51,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:55,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1081 [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 21:42:55,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:55,515 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:42:55,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:42:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:55,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:55,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:42:55,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:55,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 21:42:55,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:55,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:42:55,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:42:55,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:42:55,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:55,678 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:42:55,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:42:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:55,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:55,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:55,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 21:42:55,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:55,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 21:42:55,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:55,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:42:55,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:42:55,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:42:55,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:55,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 21:42:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:55,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:55,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:55,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 21:42:55,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:55,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 21:42:55,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:42:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-26 21:42:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:42:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:55,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 21:42:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:55,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:55,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:55,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 21:42:55,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:55,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:42:55,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:55,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:42:55,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-26 21:42:55,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:42:55,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 21:42:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 21:42:57,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806314181] [2020-10-26 21:42:57,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:42:57,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:42:57,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829915455] [2020-10-26 21:42:57,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:42:57,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:42:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:42:57,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:42:57,089 INFO L87 Difference]: Start difference. First operand 45742 states and 64913 transitions. Second operand 7 states. [2020-10-26 21:42:57,393 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:42:59,034 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-26 21:43:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:43:19,687 INFO L93 Difference]: Finished difference Result 106066 states and 152356 transitions. [2020-10-26 21:43:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:43:19,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1057 [2020-10-26 21:43:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:43:19,956 INFO L225 Difference]: With dead ends: 106066 [2020-10-26 21:43:19,956 INFO L226 Difference]: Without dead ends: 64548 [2020-10-26 21:43:20,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:43:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64548 states. [2020-10-26 21:43:21,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64548 to 62478. [2020-10-26 21:43:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62478 states. [2020-10-26 21:43:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62478 states to 62478 states and 89319 transitions. [2020-10-26 21:43:22,365 INFO L78 Accepts]: Start accepts. Automaton has 62478 states and 89319 transitions. Word has length 1057 [2020-10-26 21:43:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:43:22,365 INFO L481 AbstractCegarLoop]: Abstraction has 62478 states and 89319 transitions. [2020-10-26 21:43:22,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:43:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 62478 states and 89319 transitions. [2020-10-26 21:43:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1071 [2020-10-26 21:43:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:43:22,510 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:43:22,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 21:43:22,510 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:43:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:43:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1999457231, now seen corresponding path program 1 times [2020-10-26 21:43:22,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:43:22,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063429674] [2020-10-26 21:43:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:43:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:22,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:24,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:27,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:27,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:27,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1092 [2020-10-26 21:43:27,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:43:27,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 21:43:27,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:43:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:43:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 21:43:27,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:28,452 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:43:28,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:43:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:28,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:28,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:43:28,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:28,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 21:43:28,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:43:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:43:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:43:28,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:43:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:28,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:28,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:28,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 21:43:28,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:28,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 21:43:28,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:28,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:43:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:43:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 21:43:28,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:28,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 21:43:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:28,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:28,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:28,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:43:28,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 21:43:28,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:43:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:43:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:43:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:43:29,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063429674] [2020-10-26 21:43:29,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:43:29,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:43:29,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101997646] [2020-10-26 21:43:29,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:43:29,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:43:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:43:29,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:43:29,964 INFO L87 Difference]: Start difference. First operand 62478 states and 89319 transitions. Second operand 8 states. [2020-10-26 21:43:30,253 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:43:31,140 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 159