/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/Problem16_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:49:59,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:49:59,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:49:59,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:49:59,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:49:59,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:49:59,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:49:59,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:49:59,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:50:00,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:50:00,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:50:00,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:50:00,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:50:00,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:50:00,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:50:00,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:50:00,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:50:00,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:50:00,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:50:00,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:50:00,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:50:00,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:50:00,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:50:00,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:50:00,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:50:00,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:50:00,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:50:00,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:50:00,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:50:00,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:50:00,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:50:00,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:50:00,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:50:00,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:50:00,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:50:00,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:50:00,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:50:00,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:50:00,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:50:00,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:50:00,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:50:00,088 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 23:50:00,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:50:00,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:50:00,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:50:00,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:50:00,148 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:50:00,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:50:00,148 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:50:00,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:50:00,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:50:00,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:50:00,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:50:00,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:50:00,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:50:00,150 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:50:00,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:50:00,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:50:00,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:50:00,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:50:00,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:50:00,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:50:00,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:50:00,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:50:00,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:50:00,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:50:00,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:50:00,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:50:00,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:50:00,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:50:00,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:50:00,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:50:00,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:50:00,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:50:00,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:50:00,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:50:00,605 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:50:00,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label01.c [2020-10-26 23:50:00,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a204d089/4b98034389e34bde9cbe0357b43ca1e5/FLAGdf3a472eb [2020-10-26 23:50:01,590 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:50:01,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem16_label01.c [2020-10-26 23:50:01,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a204d089/4b98034389e34bde9cbe0357b43ca1e5/FLAGdf3a472eb [2020-10-26 23:50:01,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a204d089/4b98034389e34bde9cbe0357b43ca1e5 [2020-10-26 23:50:01,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:50:01,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:50:01,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:50:01,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:50:01,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:50:01,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:50:01" (1/1) ... [2020-10-26 23:50:01,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5a2305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:01, skipping insertion in model container [2020-10-26 23:50:01,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:50:01" (1/1) ... [2020-10-26 23:50:01,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:50:01,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:50:02,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:50:02,586 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:50:02,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:50:02,821 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:50:02,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02 WrapperNode [2020-10-26 23:50:02,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:50:02,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:50:02,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:50:02,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:50:02,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (1/1) ... [2020-10-26 23:50:02,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (1/1) ... [2020-10-26 23:50:02,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (1/1) ... [2020-10-26 23:50:02,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (1/1) ... [2020-10-26 23:50:02,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (1/1) ... [2020-10-26 23:50:03,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (1/1) ... [2020-10-26 23:50:03,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (1/1) ... [2020-10-26 23:50:03,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:50:03,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:50:03,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:50:03,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:50:03,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (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 23:50:03,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:50:03,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:50:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:50:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:50:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:50:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:50:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:50:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:50:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:50:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:50:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:50:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:50:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:50:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:50:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:50:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:50:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:50:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:50:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:50:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:50:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:50:05,835 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:50:05,836 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:50:05,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:50:05 BoogieIcfgContainer [2020-10-26 23:50:05,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:50:05,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:50:05,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:50:05,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:50:05,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:50:01" (1/3) ... [2020-10-26 23:50:05,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e39392d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:50:05, skipping insertion in model container [2020-10-26 23:50:05,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:50:02" (2/3) ... [2020-10-26 23:50:05,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e39392d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:50:05, skipping insertion in model container [2020-10-26 23:50:05,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:50:05" (3/3) ... [2020-10-26 23:50:05,850 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label01.c [2020-10-26 23:50:05,864 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:50:05,870 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:50:05,885 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:50:05,919 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:50:05,919 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:50:05,919 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:50:05,920 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:50:05,920 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:50:05,920 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:50:05,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:50:05,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:50:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states. [2020-10-26 23:50:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 23:50:05,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:05,963 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] [2020-10-26 23:50:05,964 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1434778076, now seen corresponding path program 1 times [2020-10-26 23:50:05,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:05,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630839319] [2020-10-26 23:50:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:06,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:06,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:06,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 23:50:06,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:06,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-26 23:50:06,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:06,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:50:06,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:06,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 23:50:06,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 23:50:07,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:07,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:07,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:07,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:07,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 23:50:07,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:07,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:07,108 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 23:50:07,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630839319] [2020-10-26 23:50:07,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:50:07,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:50:07,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325552029] [2020-10-26 23:50:07,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:50:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:07,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:50:07,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:50:07,143 INFO L87 Difference]: Start difference. First operand 413 states. Second operand 4 states. [2020-10-26 23:50:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:12,242 INFO L93 Difference]: Finished difference Result 1174 states and 2170 transitions. [2020-10-26 23:50:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:50:12,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-26 23:50:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:12,278 INFO L225 Difference]: With dead ends: 1174 [2020-10-26 23:50:12,278 INFO L226 Difference]: Without dead ends: 697 [2020-10-26 23:50:12,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:50:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-26 23:50:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 693. [2020-10-26 23:50:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-10-26 23:50:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1015 transitions. [2020-10-26 23:50:12,416 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1015 transitions. Word has length 33 [2020-10-26 23:50:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:12,416 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 1015 transitions. [2020-10-26 23:50:12,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:50:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1015 transitions. [2020-10-26 23:50:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 23:50:12,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:12,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:12,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:50:12,426 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:12,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1161169853, now seen corresponding path program 1 times [2020-10-26 23:50:12,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:12,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305065695] [2020-10-26 23:50:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:13,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:13,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 23:50:13,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:50:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1194 [2020-10-26 23:50:13,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:50:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 23:50:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:50:13,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:13,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:13,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:13,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:13,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:13,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:50:13,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:13,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:13,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:50:13,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:13,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:14,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:14,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:50:14,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:14,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 23:50:14,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:50:14,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:14,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305065695] [2020-10-26 23:50:14,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:50:14,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:50:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165337224] [2020-10-26 23:50:14,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:14,202 INFO L87 Difference]: Start difference. First operand 693 states and 1015 transitions. Second operand 7 states. [2020-10-26 23:50:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:19,837 INFO L93 Difference]: Finished difference Result 2092 states and 3103 transitions. [2020-10-26 23:50:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:50:19,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-26 23:50:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:19,852 INFO L225 Difference]: With dead ends: 2092 [2020-10-26 23:50:19,852 INFO L226 Difference]: Without dead ends: 1405 [2020-10-26 23:50:19,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:50:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2020-10-26 23:50:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1384. [2020-10-26 23:50:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2020-10-26 23:50:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1820 transitions. [2020-10-26 23:50:19,974 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1820 transitions. Word has length 109 [2020-10-26 23:50:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:19,975 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 1820 transitions. [2020-10-26 23:50:19,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1820 transitions. [2020-10-26 23:50:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 23:50:19,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:19,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:19,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:50:19,988 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:19,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1846997429, now seen corresponding path program 1 times [2020-10-26 23:50:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:19,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780369290] [2020-10-26 23:50:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:20,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:20,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:20,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 23:50:20,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-26 23:50:20,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-26 23:50:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 23:50:20,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:20,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:20,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:20,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:20,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:20,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:50:20,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:20,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:20,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:20,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:20,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:20,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:50:20,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:20,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 23:50:20,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:20,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:20,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:20,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:50:20,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:20,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780369290] [2020-10-26 23:50:20,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:20,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:50:20,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804551806] [2020-10-26 23:50:20,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:50:20,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:50:20,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:50:20,733 INFO L87 Difference]: Start difference. First operand 1384 states and 1820 transitions. Second operand 5 states. [2020-10-26 23:50:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:26,115 INFO L93 Difference]: Finished difference Result 3806 states and 5148 transitions. [2020-10-26 23:50:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:50:26,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-26 23:50:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:26,134 INFO L225 Difference]: With dead ends: 3806 [2020-10-26 23:50:26,135 INFO L226 Difference]: Without dead ends: 2428 [2020-10-26 23:50:26,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:50:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2020-10-26 23:50:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2422. [2020-10-26 23:50:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2020-10-26 23:50:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3087 transitions. [2020-10-26 23:50:26,229 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3087 transitions. Word has length 124 [2020-10-26 23:50:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:26,231 INFO L481 AbstractCegarLoop]: Abstraction has 2422 states and 3087 transitions. [2020-10-26 23:50:26,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:50:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3087 transitions. [2020-10-26 23:50:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-26 23:50:26,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:26,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:26,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:50:26,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1792225009, now seen corresponding path program 1 times [2020-10-26 23:50:26,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:26,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196935339] [2020-10-26 23:50:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:26,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:28,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:28,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-26 23:50:28,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:50:28,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2075 [2020-10-26 23:50:28,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:50:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 23:50:28,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:28,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:28,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:28,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:28,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:50:28,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:28,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:28,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:28,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:28,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:28,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:28,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:28,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:28,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 23:50:28,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:28,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-26 23:50:28,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 23:50:28,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:29,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196935339] [2020-10-26 23:50:29,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:50:29,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:50:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055234785] [2020-10-26 23:50:29,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:29,197 INFO L87 Difference]: Start difference. First operand 2422 states and 3087 transitions. Second operand 7 states. [2020-10-26 23:50:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:34,539 INFO L93 Difference]: Finished difference Result 5579 states and 7045 transitions. [2020-10-26 23:50:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:50:34,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 199 [2020-10-26 23:50:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:34,559 INFO L225 Difference]: With dead ends: 5579 [2020-10-26 23:50:34,559 INFO L226 Difference]: Without dead ends: 3163 [2020-10-26 23:50:34,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:50:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2020-10-26 23:50:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3142. [2020-10-26 23:50:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3142 states. [2020-10-26 23:50:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 3885 transitions. [2020-10-26 23:50:34,670 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 3885 transitions. Word has length 199 [2020-10-26 23:50:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:34,671 INFO L481 AbstractCegarLoop]: Abstraction has 3142 states and 3885 transitions. [2020-10-26 23:50:34,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 3885 transitions. [2020-10-26 23:50:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-26 23:50:34,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:34,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:34,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:50:34,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -614954648, now seen corresponding path program 1 times [2020-10-26 23:50:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:34,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131955470] [2020-10-26 23:50:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:34,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:35,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:37,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:37,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-26 23:50:37,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:50:37,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3247 [2020-10-26 23:50:37,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:37,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:50:37,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:37,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 244 [2020-10-26 23:50:37,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:38,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:38,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:38,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:38,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:38,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 23:50:38,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:38,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:38,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:38,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:38,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:38,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:38,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:50:38,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:50:38,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 23:50:38,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:38,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:38,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:38,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:50:38,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:38,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 23:50:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:38,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:38,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:38,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 23:50:38,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:38,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-26 23:50:38,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-26 23:50:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 51 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:50:39,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131955470] [2020-10-26 23:50:39,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:39,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:50:39,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655266541] [2020-10-26 23:50:39,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:50:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:39,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:50:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:50:39,120 INFO L87 Difference]: Start difference. First operand 3142 states and 3885 transitions. Second operand 8 states. [2020-10-26 23:50:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:45,090 INFO L93 Difference]: Finished difference Result 7081 states and 9322 transitions. [2020-10-26 23:50:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:50:45,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 269 [2020-10-26 23:50:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:45,129 INFO L225 Difference]: With dead ends: 7081 [2020-10-26 23:50:45,131 INFO L226 Difference]: Without dead ends: 4621 [2020-10-26 23:50:45,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:50:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4621 states. [2020-10-26 23:50:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4621 to 4569. [2020-10-26 23:50:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4569 states. [2020-10-26 23:50:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 5619 transitions. [2020-10-26 23:50:45,292 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 5619 transitions. Word has length 269 [2020-10-26 23:50:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:45,294 INFO L481 AbstractCegarLoop]: Abstraction has 4569 states and 5619 transitions. [2020-10-26 23:50:45,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:50:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 5619 transitions. [2020-10-26 23:50:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-26 23:50:45,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:45,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:45,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:50:45,303 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 744134456, now seen corresponding path program 1 times [2020-10-26 23:50:45,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:45,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745140984] [2020-10-26 23:50:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:45,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:45,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:48,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:48,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 387 [2020-10-26 23:50:48,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:50:48,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3052 [2020-10-26 23:50:48,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:48,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:48,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-26 23:50:48,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 252 [2020-10-26 23:50:48,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:48,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:48,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:48,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:48,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:48,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:48,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:50:48,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:48,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:50:48,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:48,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:48,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:50:48,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:48,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 23:50:48,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:48,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:50:48,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:48,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 23:50:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:49,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:49,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-26 23:50:49,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:49,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-26 23:50:49,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 250 [2020-10-26 23:50:49,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:50:50,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745140984] [2020-10-26 23:50:50,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:50,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:50:50,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226570437] [2020-10-26 23:50:50,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:50,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:50,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:50,704 INFO L87 Difference]: Start difference. First operand 4569 states and 5619 transitions. Second operand 7 states. [2020-10-26 23:50:57,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:57,403 INFO L93 Difference]: Finished difference Result 9936 states and 12349 transitions. [2020-10-26 23:50:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:50:57,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 373 [2020-10-26 23:50:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:57,436 INFO L225 Difference]: With dead ends: 9936 [2020-10-26 23:50:57,437 INFO L226 Difference]: Without dead ends: 5325 [2020-10-26 23:50:57,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:50:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2020-10-26 23:50:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 5250. [2020-10-26 23:50:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5250 states. [2020-10-26 23:50:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5250 states to 5250 states and 6069 transitions. [2020-10-26 23:50:57,612 INFO L78 Accepts]: Start accepts. Automaton has 5250 states and 6069 transitions. Word has length 373 [2020-10-26 23:50:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:57,613 INFO L481 AbstractCegarLoop]: Abstraction has 5250 states and 6069 transitions. [2020-10-26 23:50:57,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5250 states and 6069 transitions. [2020-10-26 23:50:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-26 23:50:57,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:57,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:50:57,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:50:57,623 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:57,624 INFO L82 PathProgramCache]: Analyzing trace with hash 77070420, now seen corresponding path program 1 times [2020-10-26 23:50:57,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:57,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604592782] [2020-10-26 23:50:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:57,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:59,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:59,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-10-26 23:50:59,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:50:59,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2101 [2020-10-26 23:50:59,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:59,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 249 [2020-10-26 23:50:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 23:50:59,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:59,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:00,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:00,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:00,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:00,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:00,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:51:00,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:00,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:00,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:00,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:00,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:00,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:00,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 23:51:00,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:00,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-26 23:51:00,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:00,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:00,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:00,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-26 23:51:00,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:00,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-26 23:51:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:00,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:00,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:00,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 23:51:00,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:00,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-26 23:51:00,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:51:00,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:51:01,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604592782] [2020-10-26 23:51:01,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:01,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:51:01,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687280721] [2020-10-26 23:51:01,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:51:01,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:51:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:51:01,099 INFO L87 Difference]: Start difference. First operand 5250 states and 6069 transitions. Second operand 7 states. [2020-10-26 23:51:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:06,789 INFO L93 Difference]: Finished difference Result 11567 states and 13780 transitions. [2020-10-26 23:51:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:51:06,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 395 [2020-10-26 23:51:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:06,827 INFO L225 Difference]: With dead ends: 11567 [2020-10-26 23:51:06,827 INFO L226 Difference]: Without dead ends: 6999 [2020-10-26 23:51:06,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:51:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2020-10-26 23:51:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6969. [2020-10-26 23:51:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6969 states. [2020-10-26 23:51:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6969 states to 6969 states and 7934 transitions. [2020-10-26 23:51:07,102 INFO L78 Accepts]: Start accepts. Automaton has 6969 states and 7934 transitions. Word has length 395 [2020-10-26 23:51:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:07,103 INFO L481 AbstractCegarLoop]: Abstraction has 6969 states and 7934 transitions. [2020-10-26 23:51:07,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:51:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6969 states and 7934 transitions. [2020-10-26 23:51:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-10-26 23:51:07,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:07,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:51:07,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:51:07,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash -911882430, now seen corresponding path program 1 times [2020-10-26 23:51:07,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:07,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414932816] [2020-10-26 23:51:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:07,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:12,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:12,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 460 [2020-10-26 23:51:12,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:51:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 23:51:12,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:51:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:51:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 421 [2020-10-26 23:51:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:12,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:12,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:12,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:12,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:12,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:51:12,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:51:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:12,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:12,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:12,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:12,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:12,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:51:12,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:51:12,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-26 23:51:12,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 248 [2020-10-26 23:51:12,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:13,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:51:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:13,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:13,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:13,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 23:51:13,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:13,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-26 23:51:13,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:13,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 23:51:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 51 proven. 161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:51:14,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414932816] [2020-10-26 23:51:14,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:14,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:51:14,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791859535] [2020-10-26 23:51:14,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:51:14,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:14,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:51:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:51:14,392 INFO L87 Difference]: Start difference. First operand 6969 states and 7934 transitions. Second operand 8 states. [2020-10-26 23:51:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:19,286 INFO L93 Difference]: Finished difference Result 13399 states and 15712 transitions. [2020-10-26 23:51:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 23:51:19,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 446 [2020-10-26 23:51:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:19,339 INFO L225 Difference]: With dead ends: 13399 [2020-10-26 23:51:19,340 INFO L226 Difference]: Without dead ends: 7112 [2020-10-26 23:51:19,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:51:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7112 states. [2020-10-26 23:51:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7112 to 6980. [2020-10-26 23:51:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6980 states. [2020-10-26 23:51:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6980 states to 6980 states and 7947 transitions. [2020-10-26 23:51:19,697 INFO L78 Accepts]: Start accepts. Automaton has 6980 states and 7947 transitions. Word has length 446 [2020-10-26 23:51:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:19,699 INFO L481 AbstractCegarLoop]: Abstraction has 6980 states and 7947 transitions. [2020-10-26 23:51:19,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:51:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6980 states and 7947 transitions. [2020-10-26 23:51:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-10-26 23:51:19,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:19,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:51:19,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:51:19,711 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash 937817164, now seen corresponding path program 1 times [2020-10-26 23:51:19,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:19,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845735613] [2020-10-26 23:51:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:19,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:20,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:22,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:22,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-10-26 23:51:22,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:51:22,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2976 [2020-10-26 23:51:22,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 23:51:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:51:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 460 [2020-10-26 23:51:22,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:51:22,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:22,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:22,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:22,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:22,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:51:22,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:22,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:22,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:22,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:51:22,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:23,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:23,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:23,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-26 23:51:23,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:23,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-26 23:51:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:23,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:23,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 23:51:23,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:23,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-26 23:51:23,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:23,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:51:23,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:23,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-26 23:51:23,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 229 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:51:24,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845735613] [2020-10-26 23:51:24,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:24,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:51:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293636605] [2020-10-26 23:51:24,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 23:51:24,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 23:51:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 23:51:24,348 INFO L87 Difference]: Start difference. First operand 6980 states and 7947 transitions. Second operand 9 states. [2020-10-26 23:51:26,775 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-26 23:51:33,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:33,260 INFO L93 Difference]: Finished difference Result 17853 states and 20654 transitions. [2020-10-26 23:51:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 23:51:33,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 455 [2020-10-26 23:51:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:33,307 INFO L225 Difference]: With dead ends: 17853 [2020-10-26 23:51:33,307 INFO L226 Difference]: Without dead ends: 11555 [2020-10-26 23:51:33,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:51:33,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11555 states. [2020-10-26 23:51:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11555 to 11498. [2020-10-26 23:51:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11498 states. [2020-10-26 23:51:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11498 states to 11498 states and 13208 transitions. [2020-10-26 23:51:33,622 INFO L78 Accepts]: Start accepts. Automaton has 11498 states and 13208 transitions. Word has length 455 [2020-10-26 23:51:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:33,623 INFO L481 AbstractCegarLoop]: Abstraction has 11498 states and 13208 transitions. [2020-10-26 23:51:33,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 23:51:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11498 states and 13208 transitions. [2020-10-26 23:51:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-10-26 23:51:33,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:33,638 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:51:33,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:51:33,638 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:33,639 INFO L82 PathProgramCache]: Analyzing trace with hash 748764547, now seen corresponding path program 1 times [2020-10-26 23:51:33,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:33,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242389921] [2020-10-26 23:51:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:33,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:34,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:34,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:35,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 490 [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1934 [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 359 [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 23:51:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:35,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:35,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:35,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:35,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:35,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:51:35,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:35,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:35,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:35,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:35,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:35,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:35,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:51:35,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:35,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 23:51:35,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:35,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:36,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:51:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:36,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:36,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:36,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:51:36,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:36,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 23:51:36,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:51:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:36,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2020-10-26 23:51:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:36,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:36,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 23:51:36,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:36,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 23:51:36,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:36,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:36,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:36,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:51:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 262 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-26 23:51:36,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242389921] [2020-10-26 23:51:36,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:36,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:51:36,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327517712] [2020-10-26 23:51:36,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:51:36,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:36,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:51:36,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:51:36,518 INFO L87 Difference]: Start difference. First operand 11498 states and 13208 transitions. Second operand 7 states. [2020-10-26 23:51:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:42,403 INFO L93 Difference]: Finished difference Result 25068 states and 29695 transitions. [2020-10-26 23:51:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:51:42,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 474 [2020-10-26 23:51:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:42,463 INFO L225 Difference]: With dead ends: 25068 [2020-10-26 23:51:42,463 INFO L226 Difference]: Without dead ends: 14252 [2020-10-26 23:51:42,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:51:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14252 states. [2020-10-26 23:51:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14252 to 13198. [2020-10-26 23:51:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13198 states. [2020-10-26 23:51:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13198 states to 13198 states and 15130 transitions. [2020-10-26 23:51:42,917 INFO L78 Accepts]: Start accepts. Automaton has 13198 states and 15130 transitions. Word has length 474 [2020-10-26 23:51:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:42,918 INFO L481 AbstractCegarLoop]: Abstraction has 13198 states and 15130 transitions. [2020-10-26 23:51:42,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:51:42,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13198 states and 15130 transitions. [2020-10-26 23:51:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-10-26 23:51:42,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:42,926 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:42,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:51:42,926 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1980910611, now seen corresponding path program 1 times [2020-10-26 23:51:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:42,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090351141] [2020-10-26 23:51:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:43,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:43,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:43,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 519 [2020-10-26 23:51:43,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:43,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-26 23:51:43,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 484 [2020-10-26 23:51:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 23:51:43,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:43,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:43,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:43,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:43,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:43,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:51:43,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:43,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:43,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:43,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:43,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:43,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:51:43,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:43,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 23:51:43,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:43,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:43,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:43,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:43,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:44,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:51:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:44,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:44,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:44,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:51:44,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 23:51:44,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:44,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2020-10-26 23:51:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:44,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:44,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:44,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 23:51:44,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 23:51:44,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:44,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 23:51:44,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-10-26 23:51:44,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090351141] [2020-10-26 23:51:44,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:44,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:51:44,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970304381] [2020-10-26 23:51:44,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:51:44,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:51:44,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:51:44,447 INFO L87 Difference]: Start difference. First operand 13198 states and 15130 transitions. Second operand 5 states. [2020-10-26 23:51:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:50,002 INFO L93 Difference]: Finished difference Result 27476 states and 32054 transitions. [2020-10-26 23:51:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:51:50,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 503 [2020-10-26 23:51:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:50,147 INFO L225 Difference]: With dead ends: 27476 [2020-10-26 23:51:50,148 INFO L226 Difference]: Without dead ends: 14960 [2020-10-26 23:51:50,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:51:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14960 states. [2020-10-26 23:51:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14960 to 14945. [2020-10-26 23:51:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14945 states. [2020-10-26 23:51:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14945 states to 14945 states and 17278 transitions. [2020-10-26 23:51:50,541 INFO L78 Accepts]: Start accepts. Automaton has 14945 states and 17278 transitions. Word has length 503 [2020-10-26 23:51:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:50,542 INFO L481 AbstractCegarLoop]: Abstraction has 14945 states and 17278 transitions. [2020-10-26 23:51:50,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:51:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 14945 states and 17278 transitions. [2020-10-26 23:51:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-10-26 23:51:50,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:50,551 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:51:50,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:51:50,552 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:50,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1275870890, now seen corresponding path program 1 times [2020-10-26 23:51:50,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:50,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628111111] [2020-10-26 23:51:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:51,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:51,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 566 [2020-10-26 23:51:51,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-26 23:51:51,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:51:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 257 [2020-10-26 23:51:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 305 [2020-10-26 23:51:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:52,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:52,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:52,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:52,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:52,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 23:51:52,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:52,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:52,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:52,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:52,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:52,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:52,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:52,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:52,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:51:52,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:52,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 23:51:52,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-10-26 23:51:52,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:51:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:52,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:52,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:52,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-26 23:51:52,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:52,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-26 23:51:52,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:52,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:51:52,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:52,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 273 [2020-10-26 23:51:52,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 271 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:51:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628111111] [2020-10-26 23:51:53,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:53,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:51:53,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031388842] [2020-10-26 23:51:53,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:51:53,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:53,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:51:53,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:51:53,190 INFO L87 Difference]: Start difference. First operand 14945 states and 17278 transitions. Second operand 8 states. [2020-10-26 23:52:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:01,917 INFO L93 Difference]: Finished difference Result 33336 states and 39380 transitions. [2020-10-26 23:52:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:52:01,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 552 [2020-10-26 23:52:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:01,985 INFO L225 Difference]: With dead ends: 33336 [2020-10-26 23:52:01,985 INFO L226 Difference]: Without dead ends: 19073 [2020-10-26 23:52:02,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:52:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19073 states. [2020-10-26 23:52:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19073 to 19052. [2020-10-26 23:52:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19052 states. [2020-10-26 23:52:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 22638 transitions. [2020-10-26 23:52:02,435 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 22638 transitions. Word has length 552 [2020-10-26 23:52:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:02,436 INFO L481 AbstractCegarLoop]: Abstraction has 19052 states and 22638 transitions. [2020-10-26 23:52:02,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:52:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 22638 transitions. [2020-10-26 23:52:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-10-26 23:52:02,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:02,446 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:52:02,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:52:02,446 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:02,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2092272323, now seen corresponding path program 1 times [2020-10-26 23:52:02,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:02,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562587765] [2020-10-26 23:52:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:02,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:04,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:04,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 607 [2020-10-26 23:52:04,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:52:04,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2368 [2020-10-26 23:52:04,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 359 [2020-10-26 23:52:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-26 23:52:04,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:05,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:05,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:05,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:05,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:05,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:05,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:05,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:52:05,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:05,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 23:52:05,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:05,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:05,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:05,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:05,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:05,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:52:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:05,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:05,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:52:05,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 23:52:05,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:05,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:52:05,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:05,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2020-10-26 23:52:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:05,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:05,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:05,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 23:52:05,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:05,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-26 23:52:05,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:05,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:05,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:05,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-26 23:52:05,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-26 23:52:06,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562587765] [2020-10-26 23:52:06,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:06,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:52:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273592094] [2020-10-26 23:52:06,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:52:06,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:52:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:52:06,045 INFO L87 Difference]: Start difference. First operand 19052 states and 22638 transitions. Second operand 7 states. [2020-10-26 23:52:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:11,988 INFO L93 Difference]: Finished difference Result 40541 states and 48188 transitions. [2020-10-26 23:52:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:52:11,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 591 [2020-10-26 23:52:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:12,050 INFO L225 Difference]: With dead ends: 40541 [2020-10-26 23:52:12,050 INFO L226 Difference]: Without dead ends: 22171 [2020-10-26 23:52:12,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:52:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22171 states. [2020-10-26 23:52:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22171 to 22148. [2020-10-26 23:52:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22148 states. [2020-10-26 23:52:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22148 states to 22148 states and 26058 transitions. [2020-10-26 23:52:12,569 INFO L78 Accepts]: Start accepts. Automaton has 22148 states and 26058 transitions. Word has length 591 [2020-10-26 23:52:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:12,569 INFO L481 AbstractCegarLoop]: Abstraction has 22148 states and 26058 transitions. [2020-10-26 23:52:12,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:52:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 22148 states and 26058 transitions. [2020-10-26 23:52:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2020-10-26 23:52:12,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:12,582 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:12,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 23:52:12,582 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:12,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:12,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1175349321, now seen corresponding path program 1 times [2020-10-26 23:52:12,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:12,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319455495] [2020-10-26 23:52:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:12,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:13,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:13,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 672 [2020-10-26 23:52:13,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:13,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-26 23:52:13,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:13,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:13,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 637 [2020-10-26 23:52:13,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 23:52:13,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:14,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:14,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:14,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:14,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:14,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:52:14,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:14,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:14,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:14,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:14,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:52:14,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:14,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 23:52:14,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:14,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:14,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:52:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:14,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:14,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:14,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 23:52:14,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 23:52:14,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:14,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-10-26 23:52:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:14,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:14,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 23:52:14,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:14,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 23:52:14,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-26 23:52:14,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2020-10-26 23:52:14,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319455495] [2020-10-26 23:52:14,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:14,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:52:14,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672375387] [2020-10-26 23:52:14,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:52:14,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:14,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:52:14,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:52:14,922 INFO L87 Difference]: Start difference. First operand 22148 states and 26058 transitions. Second operand 5 states. [2020-10-26 23:52:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:20,050 INFO L93 Difference]: Finished difference Result 47674 states and 56193 transitions. [2020-10-26 23:52:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:52:20,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 656 [2020-10-26 23:52:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:20,126 INFO L225 Difference]: With dead ends: 47674 [2020-10-26 23:52:20,127 INFO L226 Difference]: Without dead ends: 26208 [2020-10-26 23:52:20,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:52:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26208 states. [2020-10-26 23:52:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26208 to 25859. [2020-10-26 23:52:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25859 states. [2020-10-26 23:52:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25859 states to 25859 states and 30105 transitions. [2020-10-26 23:52:20,859 INFO L78 Accepts]: Start accepts. Automaton has 25859 states and 30105 transitions. Word has length 656 [2020-10-26 23:52:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:20,860 INFO L481 AbstractCegarLoop]: Abstraction has 25859 states and 30105 transitions. [2020-10-26 23:52:20,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:52:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 25859 states and 30105 transitions. [2020-10-26 23:52:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2020-10-26 23:52:20,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:20,874 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:52:20,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 23:52:20,874 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:20,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash 967063213, now seen corresponding path program 1 times [2020-10-26 23:52:20,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:20,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907458717] [2020-10-26 23:52:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:21,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:21,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 694 [2020-10-26 23:52:21,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:21,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-26 23:52:21,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 474 [2020-10-26 23:52:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-26 23:52:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:21,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:21,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:21,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:21,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:22,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:22,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:22,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:22,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 23:52:22,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:22,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 23:52:22,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:22,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:22,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:22,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:22,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:22,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-26 23:52:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:22,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:22,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:22,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 23:52:22,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:22,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 23:52:22,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-10-26 23:52:22,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:22,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-10-26 23:52:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:22,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:22,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 23:52:22,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:22,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 23:52:22,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-26 23:52:22,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 440 proven. 2 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-26 23:52:23,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907458717] [2020-10-26 23:52:23,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:23,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:52:23,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143232828] [2020-10-26 23:52:23,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:52:23,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:52:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:52:23,327 INFO L87 Difference]: Start difference. First operand 25859 states and 30105 transitions. Second operand 7 states. [2020-10-26 23:52:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:29,957 INFO L93 Difference]: Finished difference Result 56504 states and 67273 transitions. [2020-10-26 23:52:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:52:29,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 678 [2020-10-26 23:52:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:30,052 INFO L225 Difference]: With dead ends: 56504 [2020-10-26 23:52:30,052 INFO L226 Difference]: Without dead ends: 31327 [2020-10-26 23:52:30,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:52:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31327 states. [2020-10-26 23:52:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31327 to 31271. [2020-10-26 23:52:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31271 states. [2020-10-26 23:52:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31271 states to 31271 states and 36053 transitions. [2020-10-26 23:52:30,999 INFO L78 Accepts]: Start accepts. Automaton has 31271 states and 36053 transitions. Word has length 678 [2020-10-26 23:52:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:31,000 INFO L481 AbstractCegarLoop]: Abstraction has 31271 states and 36053 transitions. [2020-10-26 23:52:31,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:52:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 31271 states and 36053 transitions. [2020-10-26 23:52:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2020-10-26 23:52:31,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:31,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:52:31,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 23:52:31,019 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1754428861, now seen corresponding path program 1 times [2020-10-26 23:52:31,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:31,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632068086] [2020-10-26 23:52:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:32,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:32,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 730 [2020-10-26 23:52:32,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:32,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1735 [2020-10-26 23:52:32,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:52:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 416 [2020-10-26 23:52:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 310 [2020-10-26 23:52:32,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:33,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:33,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:33,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:33,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:33,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:33,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:33,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:33,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:33,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:52:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:33,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:33,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 23:52:33,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 23:52:33,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-26 23:52:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:33,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-10-26 23:52:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:33,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:33,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-26 23:52:33,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:33,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-26 23:52:33,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:33,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:52:33,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:33,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 278 [2020-10-26 23:52:33,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 454 proven. 26 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-26 23:52:34,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632068086] [2020-10-26 23:52:34,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:34,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:52:34,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718215501] [2020-10-26 23:52:34,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:52:34,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:34,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:52:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:52:34,578 INFO L87 Difference]: Start difference. First operand 31271 states and 36053 transitions. Second operand 8 states. [2020-10-26 23:52:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:43,710 INFO L93 Difference]: Finished difference Result 70116 states and 81219 transitions. [2020-10-26 23:52:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 23:52:43,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 714 [2020-10-26 23:52:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:43,787 INFO L225 Difference]: With dead ends: 70116 [2020-10-26 23:52:43,787 INFO L226 Difference]: Without dead ends: 39527 [2020-10-26 23:52:43,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:52:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39527 states. [2020-10-26 23:52:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39527 to 38485. [2020-10-26 23:52:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38485 states. [2020-10-26 23:52:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38485 states to 38485 states and 44434 transitions. [2020-10-26 23:52:44,734 INFO L78 Accepts]: Start accepts. Automaton has 38485 states and 44434 transitions. Word has length 714 [2020-10-26 23:52:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:44,735 INFO L481 AbstractCegarLoop]: Abstraction has 38485 states and 44434 transitions. [2020-10-26 23:52:44,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:52:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 38485 states and 44434 transitions. [2020-10-26 23:52:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2020-10-26 23:52:44,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:44,753 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:52:44,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 23:52:44,754 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash 903197022, now seen corresponding path program 1 times [2020-10-26 23:52:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:44,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265698657] [2020-10-26 23:52:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:44,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:45,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 743 [2020-10-26 23:52:45,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-26 23:52:45,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 523 [2020-10-26 23:52:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-26 23:52:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:45,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:45,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:45,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:45,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:45,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:45,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:52:45,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:45,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:45,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:45,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:45,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:52:45,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:45,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 23:52:45,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:45,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:45,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:45,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:45,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:46,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:52:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2020-10-26 23:52:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:46,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:46,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-26 23:52:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:46,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 517 [2020-10-26 23:52:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:46,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:46,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:46,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 23:52:46,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:46,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 23:52:46,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:46,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:46,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:46,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-26 23:52:46,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 546 proven. 2 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-10-26 23:52:47,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265698657] [2020-10-26 23:52:47,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:47,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:52:47,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727278525] [2020-10-26 23:52:47,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:52:47,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:47,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:52:47,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:52:47,131 INFO L87 Difference]: Start difference. First operand 38485 states and 44434 transitions. Second operand 7 states. [2020-10-26 23:52:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:54,033 INFO L93 Difference]: Finished difference Result 78005 states and 91205 transitions. [2020-10-26 23:52:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:52:54,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 725 [2020-10-26 23:52:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:54,126 INFO L225 Difference]: With dead ends: 78005 [2020-10-26 23:52:54,126 INFO L226 Difference]: Without dead ends: 40202 [2020-10-26 23:52:54,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:52:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40202 states. [2020-10-26 23:52:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40202 to 39154. [2020-10-26 23:52:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39154 states. [2020-10-26 23:52:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39154 states to 39154 states and 44568 transitions. [2020-10-26 23:52:54,823 INFO L78 Accepts]: Start accepts. Automaton has 39154 states and 44568 transitions. Word has length 725 [2020-10-26 23:52:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:54,824 INFO L481 AbstractCegarLoop]: Abstraction has 39154 states and 44568 transitions. [2020-10-26 23:52:55,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:52:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 39154 states and 44568 transitions. [2020-10-26 23:52:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2020-10-26 23:52:55,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:55,041 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:52:55,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 23:52:55,041 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1636228144, now seen corresponding path program 1 times [2020-10-26 23:52:55,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:55,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849396660] [2020-10-26 23:52:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:55,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:56,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:56,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 785 [2020-10-26 23:52:56,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:56,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-26 23:52:56,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:52:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 637 [2020-10-26 23:52:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 23:52:56,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:56,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:56,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:56,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:56,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:56,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:52:56,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:56,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:56,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:56,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:56,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:56,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:57,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:57,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:52:57,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:57,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 23:52:57,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:57,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:57,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:57,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:57,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:57,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:52:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:57,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:57,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:57,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:57,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-10-26 23:52:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:57,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:57,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 23:52:57,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:57,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 23:52:57,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-26 23:52:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:57,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-10-26 23:52:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:57,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:57,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:57,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:52:57,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:57,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-26 23:52:57,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:52:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:57,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:52:57,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 409 proven. 27 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2020-10-26 23:52:58,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849396660] [2020-10-26 23:52:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:58,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:52:58,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252268140] [2020-10-26 23:52:58,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:52:58,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:52:58,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:52:58,371 INFO L87 Difference]: Start difference. First operand 39154 states and 44568 transitions. Second operand 8 states. [2020-10-26 23:53:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:53:07,890 INFO L93 Difference]: Finished difference Result 80372 states and 91436 transitions. [2020-10-26 23:53:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:53:07,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 767 [2020-10-26 23:53:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:53:07,974 INFO L225 Difference]: With dead ends: 80372 [2020-10-26 23:53:07,975 INFO L226 Difference]: Without dead ends: 41900 [2020-10-26 23:53:08,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:53:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41900 states. [2020-10-26 23:53:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41900 to 41192. [2020-10-26 23:53:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41192 states. [2020-10-26 23:53:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41192 states to 41192 states and 46766 transitions. [2020-10-26 23:53:08,680 INFO L78 Accepts]: Start accepts. Automaton has 41192 states and 46766 transitions. Word has length 767 [2020-10-26 23:53:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:53:08,681 INFO L481 AbstractCegarLoop]: Abstraction has 41192 states and 46766 transitions. [2020-10-26 23:53:08,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:53:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 41192 states and 46766 transitions. [2020-10-26 23:53:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2020-10-26 23:53:08,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:53:08,705 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:53:08,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 23:53:08,706 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:53:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:53:08,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1081679096, now seen corresponding path program 1 times [2020-10-26 23:53:08,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:53:08,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764614421] [2020-10-26 23:53:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:53:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:10,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:10,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 877 [2020-10-26 23:53:10,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:10,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1718 [2020-10-26 23:53:10,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:53:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 641 [2020-10-26 23:53:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-26 23:53:10,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:11,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:53:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:11,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:11,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:11,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:53:11,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:11,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:53:11,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:11,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:11,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:11,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:11,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:11,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:53:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:11,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:11,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:11,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 23:53:11,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:11,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 23:53:11,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:11,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:11,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-26 23:53:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:11,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:11,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:11,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 23:53:11,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:11,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 23:53:11,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:11,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:11,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:11,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:11,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:11,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-10-26 23:53:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:11,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:11,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:11,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 23:53:11,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:11,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 23:53:11,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:11,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:53:11,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:11,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-26 23:53:11,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:11,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 635 [2020-10-26 23:53:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:11,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:12,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:12,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 23:53:12,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:12,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-26 23:53:12,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:53:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:53:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-26 23:53:12,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 633 proven. 31 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-10-26 23:53:12,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764614421] [2020-10-26 23:53:12,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:53:12,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:53:12,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253195341] [2020-10-26 23:53:12,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:53:12,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:53:12,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:53:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:53:12,978 INFO L87 Difference]: Start difference. First operand 41192 states and 46766 transitions. Second operand 8 states. [2020-10-26 23:53:19,808 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 23:53:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:53:28,256 INFO L93 Difference]: Finished difference Result 84193 states and 96170 transitions. [2020-10-26 23:53:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:53:28,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 859 [2020-10-26 23:53:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:53:28,345 INFO L225 Difference]: With dead ends: 84193 [2020-10-26 23:53:28,345 INFO L226 Difference]: Without dead ends: 43344 [2020-10-26 23:53:28,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-26 23:53:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43344 states. [2020-10-26 23:53:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43344 to 40939. [2020-10-26 23:53:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40939 states. [2020-10-26 23:53:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40939 states to 40939 states and 45634 transitions. [2020-10-26 23:53:29,099 INFO L78 Accepts]: Start accepts. Automaton has 40939 states and 45634 transitions. Word has length 859 [2020-10-26 23:53:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:53:29,099 INFO L481 AbstractCegarLoop]: Abstraction has 40939 states and 45634 transitions. [2020-10-26 23:53:29,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:53:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 40939 states and 45634 transitions. [2020-10-26 23:53:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-10-26 23:53:29,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:53:29,119 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:53:29,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 23:53:29,119 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:53:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:53:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1707661918, now seen corresponding path program 1 times [2020-10-26 23:53:29,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:53:29,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963906835] [2020-10-26 23:53:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:53:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:29,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:30,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:30,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 938 [2020-10-26 23:53:30,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:30,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-26 23:53:30,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:30,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:53:30,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 637 [2020-10-26 23:53:30,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 267 [2020-10-26 23:53:30,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:30,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:53:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:30,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:30,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:30,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:53:30,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:30,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:53:30,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:30,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:30,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:30,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:30,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:30,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:53:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:30,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:30,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:53:30,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:30,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 23:53:30,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:30,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:30,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:30,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 23:53:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:30,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:30,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-10-26 23:53:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:30,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:31,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-26 23:53:31,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:31,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-10-26 23:53:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:31,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:53:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 265 [2020-10-26 23:53:31,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0