/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/Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:47:35,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:47:35,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:47:35,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:47:35,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:47:35,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:47:35,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:47:35,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:47:35,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:47:35,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:47:35,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:47:35,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:47:35,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:47:35,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:47:35,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:47:35,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:47:35,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:47:35,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:47:35,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:47:35,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:47:35,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:47:35,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:47:35,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:47:35,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:47:35,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:47:35,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:47:35,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:47:35,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:47:35,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:47:35,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:47:35,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:47:35,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:47:35,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:47:35,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:47:35,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:47:35,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:47:35,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:47:35,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:47:35,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:47:35,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:47:35,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:47:35,985 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 22:47:36,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:47:36,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:47:36,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:47:36,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:47:36,040 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:47:36,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:47:36,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:47:36,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:47:36,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:47:36,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:47:36,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:47:36,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:47:36,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:47:36,043 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:47:36,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:47:36,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:47:36,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:47:36,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:47:36,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:47:36,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:47:36,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:47:36,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:47:36,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:47:36,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:47:36,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:47:36,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:47:36,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:47:36,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:47:36,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:47:36,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:47:36,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:47:36,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:47:36,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:47:36,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:47:36,533 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:47:36,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label05.c [2020-10-26 22:47:36,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70ea78211/1ef6e2e8cc5846b0bfdf4e0aa18c3d16/FLAGc6685af9d [2020-10-26 22:47:37,660 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:47:37,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label05.c [2020-10-26 22:47:37,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70ea78211/1ef6e2e8cc5846b0bfdf4e0aa18c3d16/FLAGc6685af9d [2020-10-26 22:47:38,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70ea78211/1ef6e2e8cc5846b0bfdf4e0aa18c3d16 [2020-10-26 22:47:38,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:47:38,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:47:38,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:47:38,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:47:38,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:47:38,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:47:38" (1/1) ... [2020-10-26 22:47:38,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730f1b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:38, skipping insertion in model container [2020-10-26 22:47:38,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:47:38" (1/1) ... [2020-10-26 22:47:38,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:47:38,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:47:39,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:47:39,601 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:47:40,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:47:40,570 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:47:40,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40 WrapperNode [2020-10-26 22:47:40,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:47:40,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:47:40,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:47:40,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:47:40,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (1/1) ... [2020-10-26 22:47:40,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (1/1) ... [2020-10-26 22:47:40,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (1/1) ... [2020-10-26 22:47:40,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (1/1) ... [2020-10-26 22:47:40,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (1/1) ... [2020-10-26 22:47:40,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (1/1) ... [2020-10-26 22:47:40,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (1/1) ... [2020-10-26 22:47:40,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:47:40,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:47:40,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:47:40,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:47:40,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (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 22:47:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:47:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:47:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:47:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:47:41,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:47:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:47:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:47:41,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:47:41,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:47:41,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:47:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:47:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:47:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:47:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:47:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:47:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:47:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:47:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:47:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:47:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:47:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:47:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:47:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:47:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:47:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:47:46,696 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:47:46,696 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:47:46,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:47:46 BoogieIcfgContainer [2020-10-26 22:47:46,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:47:46,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:47:46,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:47:46,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:47:46,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:47:38" (1/3) ... [2020-10-26 22:47:46,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2631cf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:47:46, skipping insertion in model container [2020-10-26 22:47:46,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:47:40" (2/3) ... [2020-10-26 22:47:46,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2631cf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:47:46, skipping insertion in model container [2020-10-26 22:47:46,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:47:46" (3/3) ... [2020-10-26 22:47:46,719 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label05.c [2020-10-26 22:47:46,729 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:47:46,735 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:47:46,751 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:47:46,788 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:47:46,788 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:47:46,788 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:47:46,789 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:47:46,789 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:47:46,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:47:46,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:47:46,789 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:47:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:47:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 22:47:46,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:46,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:47:46,840 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash -947553692, now seen corresponding path program 1 times [2020-10-26 22:47:46,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:46,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862838906] [2020-10-26 22:47:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:47,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:47,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:47:47,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-26 22:47:47,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:47:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:47:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 22:47:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:47:47,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:47,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:47,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:47,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:47,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 22:47:47,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:47,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:47:47,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:47,954 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 22:47:47,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862838906] [2020-10-26 22:47:47,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:47:47,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 22:47:47,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583289895] [2020-10-26 22:47:47,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:47:47,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:47:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:47:47,983 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 5 states. [2020-10-26 22:47:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:59,818 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:47:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:47:59,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-26 22:47:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:59,854 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:47:59,854 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:47:59,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:47:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:48:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:48:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:48:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2864 transitions. [2020-10-26 22:48:00,069 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2864 transitions. Word has length 66 [2020-10-26 22:48:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:00,070 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2864 transitions. [2020-10-26 22:48:00,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:48:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2864 transitions. [2020-10-26 22:48:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-26 22:48:00,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:00,077 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:48:00,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:48:00,078 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:00,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:00,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1678769650, now seen corresponding path program 1 times [2020-10-26 22:48:00,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:00,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913827243] [2020-10-26 22:48:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:00,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:00,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:01,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:01,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:01,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 22:48:01,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:48:01,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-26 22:48:01,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:01,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:01,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:01,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:48:01,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:48:01,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:01,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:01,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:01,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:01,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:01,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 22:48:01,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:01,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:01,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:01,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-26 22:48:01,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:01,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:01,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:01,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 22:48:01,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:01,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-26 22:48:01,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:01,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:48:01,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:48:02,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913827243] [2020-10-26 22:48:02,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:02,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:48:02,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859738822] [2020-10-26 22:48:02,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:02,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:02,072 INFO L87 Difference]: Start difference. First operand 1554 states and 2864 transitions. Second operand 7 states. [2020-10-26 22:48:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:16,111 INFO L93 Difference]: Finished difference Result 4784 states and 8842 transitions. [2020-10-26 22:48:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:48:16,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-26 22:48:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:16,136 INFO L225 Difference]: With dead ends: 4784 [2020-10-26 22:48:16,137 INFO L226 Difference]: Without dead ends: 3236 [2020-10-26 22:48:16,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2020-10-26 22:48:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3142. [2020-10-26 22:48:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3142 states. [2020-10-26 22:48:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 5019 transitions. [2020-10-26 22:48:16,273 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 5019 transitions. Word has length 135 [2020-10-26 22:48:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:16,274 INFO L481 AbstractCegarLoop]: Abstraction has 3142 states and 5019 transitions. [2020-10-26 22:48:16,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 5019 transitions. [2020-10-26 22:48:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 22:48:16,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:16,278 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 22:48:16,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:48:16,278 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:16,279 INFO L82 PathProgramCache]: Analyzing trace with hash -446429118, now seen corresponding path program 1 times [2020-10-26 22:48:16,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:16,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994138748] [2020-10-26 22:48:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:16,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:16,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:17,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:17,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 22:48:17,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:48:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1564 [2020-10-26 22:48:17,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:48:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:48:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:18,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:18,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:18,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:18,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:18,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:18,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:48:18,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:18,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:18,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:18,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:18,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:18,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:18,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:18,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:48:18,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:18,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 22:48:18,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:48:18,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:48:18,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994138748] [2020-10-26 22:48:18,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:18,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:48:18,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978758165] [2020-10-26 22:48:18,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:48:18,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:18,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:48:18,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:48:18,318 INFO L87 Difference]: Start difference. First operand 3142 states and 5019 transitions. Second operand 6 states. [2020-10-26 22:48:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:31,462 INFO L93 Difference]: Finished difference Result 9484 states and 15349 transitions. [2020-10-26 22:48:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:48:31,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2020-10-26 22:48:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:31,508 INFO L225 Difference]: With dead ends: 9484 [2020-10-26 22:48:31,508 INFO L226 Difference]: Without dead ends: 6348 [2020-10-26 22:48:31,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:48:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2020-10-26 22:48:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 6323. [2020-10-26 22:48:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6323 states. [2020-10-26 22:48:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 8982 transitions. [2020-10-26 22:48:31,717 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 8982 transitions. Word has length 141 [2020-10-26 22:48:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:31,719 INFO L481 AbstractCegarLoop]: Abstraction has 6323 states and 8982 transitions. [2020-10-26 22:48:31,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:48:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 8982 transitions. [2020-10-26 22:48:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-26 22:48:31,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:31,732 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:48:31,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:48:31,733 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1006555256, now seen corresponding path program 1 times [2020-10-26 22:48:31,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:31,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373783789] [2020-10-26 22:48:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:36,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:36,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-26 22:48:36,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:48:36,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 22:48:36,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:36,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:36,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:36,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:48:36,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:36,930 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:48:36,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:36,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:36,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:36,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 22:48:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:36,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:37,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:37,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:37,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:48:37,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:37,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-26 22:48:37,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:48:37,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 22:48:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:37,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:37,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 22:48:37,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:37,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 22:48:37,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-26 22:48:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 116 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:48:37,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373783789] [2020-10-26 22:48:37,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:37,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:37,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799483091] [2020-10-26 22:48:37,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:37,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:37,399 INFO L87 Difference]: Start difference. First operand 6323 states and 8982 transitions. Second operand 7 states. [2020-10-26 22:48:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:52,475 INFO L93 Difference]: Finished difference Result 18615 states and 27385 transitions. [2020-10-26 22:48:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:48:52,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 214 [2020-10-26 22:48:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:52,550 INFO L225 Difference]: With dead ends: 18615 [2020-10-26 22:48:52,551 INFO L226 Difference]: Without dead ends: 12298 [2020-10-26 22:48:52,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:48:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12298 states. [2020-10-26 22:48:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12298 to 11976. [2020-10-26 22:48:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11976 states. [2020-10-26 22:48:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11976 states to 11976 states and 16403 transitions. [2020-10-26 22:48:52,988 INFO L78 Accepts]: Start accepts. Automaton has 11976 states and 16403 transitions. Word has length 214 [2020-10-26 22:48:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:52,989 INFO L481 AbstractCegarLoop]: Abstraction has 11976 states and 16403 transitions. [2020-10-26 22:48:52,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11976 states and 16403 transitions. [2020-10-26 22:48:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-26 22:48:52,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:52,995 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:52,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:48:52,996 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1586500314, now seen corresponding path program 1 times [2020-10-26 22:48:52,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:52,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137859182] [2020-10-26 22:48:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:53,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:53,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:54,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:55,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:55,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 22:48:55,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:48:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2125 [2020-10-26 22:48:55,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:48:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 22:48:55,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:55,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:55,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:55,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:55,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:48:55,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:55,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:55,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:55,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:55,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:48:55,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:55,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 22:48:55,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:48:55,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:48:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:55,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:55,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:55,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 22:48:55,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:55,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 22:48:55,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:55,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:55,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:55,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 22:48:55,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:48:55,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137859182] [2020-10-26 22:48:55,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:55,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:55,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405658461] [2020-10-26 22:48:55,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:55,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:55,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:55,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:55,809 INFO L87 Difference]: Start difference. First operand 11976 states and 16403 transitions. Second operand 7 states. [2020-10-26 22:49:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:18,073 INFO L93 Difference]: Finished difference Result 32488 states and 47820 transitions. [2020-10-26 22:49:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:49:18,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2020-10-26 22:49:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:18,150 INFO L225 Difference]: With dead ends: 32488 [2020-10-26 22:49:18,151 INFO L226 Difference]: Without dead ends: 18174 [2020-10-26 22:49:18,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:49:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18174 states. [2020-10-26 22:49:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18174 to 17731. [2020-10-26 22:49:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17731 states. [2020-10-26 22:49:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17731 states to 17731 states and 22968 transitions. [2020-10-26 22:49:18,817 INFO L78 Accepts]: Start accepts. Automaton has 17731 states and 22968 transitions. Word has length 241 [2020-10-26 22:49:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:18,818 INFO L481 AbstractCegarLoop]: Abstraction has 17731 states and 22968 transitions. [2020-10-26 22:49:18,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 17731 states and 22968 transitions. [2020-10-26 22:49:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 22:49:18,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:18,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:18,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:49:18,826 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1111730424, now seen corresponding path program 1 times [2020-10-26 22:49:18,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:18,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437505595] [2020-10-26 22:49:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:19,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:19,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:20,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:20,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-26 22:49:20,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1718 [2020-10-26 22:49:20,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:49:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-26 22:49:20,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:20,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:20,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:20,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:20,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:20,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:20,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:49:20,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:20,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:20,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:49:20,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:49:20,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:20,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:21,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:21,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 22:49:21,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:21,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-26 22:49:21,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-26 22:49:21,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:49:21,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437505595] [2020-10-26 22:49:21,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:49:21,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:49:21,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055999697] [2020-10-26 22:49:21,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:21,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:21,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:21,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:21,508 INFO L87 Difference]: Start difference. First operand 17731 states and 22968 transitions. Second operand 7 states. [2020-10-26 22:49:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:37,231 INFO L93 Difference]: Finished difference Result 34997 states and 48620 transitions. [2020-10-26 22:49:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:49:37,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 264 [2020-10-26 22:49:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:37,299 INFO L225 Difference]: With dead ends: 34997 [2020-10-26 22:49:37,299 INFO L226 Difference]: Without dead ends: 18039 [2020-10-26 22:49:37,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:49:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2020-10-26 22:49:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 16124. [2020-10-26 22:49:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16124 states. [2020-10-26 22:49:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16124 states to 16124 states and 20837 transitions. [2020-10-26 22:49:37,830 INFO L78 Accepts]: Start accepts. Automaton has 16124 states and 20837 transitions. Word has length 264 [2020-10-26 22:49:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:37,831 INFO L481 AbstractCegarLoop]: Abstraction has 16124 states and 20837 transitions. [2020-10-26 22:49:37,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 16124 states and 20837 transitions. [2020-10-26 22:49:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 22:49:37,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:37,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:37,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:49:37,838 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:37,838 INFO L82 PathProgramCache]: Analyzing trace with hash 290602442, now seen corresponding path program 1 times [2020-10-26 22:49:37,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:37,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768990859] [2020-10-26 22:49:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:37,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:38,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:39,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:40,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:40,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-26 22:49:40,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:49:40,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2316 [2020-10-26 22:49:40,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:49:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-26 22:49:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:40,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:40,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:40,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:40,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:40,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:49:40,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:49:40,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:40,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:40,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:40,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:40,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 22:49:40,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-26 22:49:40,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-26 22:49:40,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:49:41,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768990859] [2020-10-26 22:49:41,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:49:41,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:49:41,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456275376] [2020-10-26 22:49:41,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:41,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:41,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:41,558 INFO L87 Difference]: Start difference. First operand 16124 states and 20837 transitions. Second operand 7 states. [2020-10-26 22:49:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:57,688 INFO L93 Difference]: Finished difference Result 38149 states and 49300 transitions. [2020-10-26 22:49:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:49:57,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2020-10-26 22:49:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:57,749 INFO L225 Difference]: With dead ends: 38149 [2020-10-26 22:49:57,750 INFO L226 Difference]: Without dead ends: 22007 [2020-10-26 22:49:57,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:49:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22007 states. [2020-10-26 22:49:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22007 to 20268. [2020-10-26 22:49:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20268 states. [2020-10-26 22:49:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20268 states to 20268 states and 25505 transitions. [2020-10-26 22:49:58,222 INFO L78 Accepts]: Start accepts. Automaton has 20268 states and 25505 transitions. Word has length 265 [2020-10-26 22:49:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:58,222 INFO L481 AbstractCegarLoop]: Abstraction has 20268 states and 25505 transitions. [2020-10-26 22:49:58,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 20268 states and 25505 transitions. [2020-10-26 22:49:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-26 22:49:58,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:58,229 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:58,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:49:58,229 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:58,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1126448496, now seen corresponding path program 1 times [2020-10-26 22:49:58,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:58,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240212140] [2020-10-26 22:49:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:58,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:58,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:59,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:59,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:00,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:00,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 300 [2020-10-26 22:50:00,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:50:00,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2689 [2020-10-26 22:50:00,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:50:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:50:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-26 22:50:00,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:01,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:01,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:01,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:01,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:01,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:50:01,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:01,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:50:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:01,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:01,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:50:01,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:01,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 22:50:01,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:01,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:50:01,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:01,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:50:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:01,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:01,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:01,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:01,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:50:01,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:01,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 22:50:01,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:50:01,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 128 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:50:01,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240212140] [2020-10-26 22:50:01,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:01,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:50:01,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790240009] [2020-10-26 22:50:01,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:50:01,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:50:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:50:01,718 INFO L87 Difference]: Start difference. First operand 20268 states and 25505 transitions. Second operand 6 states. [2020-10-26 22:50:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:20,794 INFO L93 Difference]: Finished difference Result 54438 states and 72334 transitions. [2020-10-26 22:50:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:50:20,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 286 [2020-10-26 22:50:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:21,022 INFO L225 Difference]: With dead ends: 54438 [2020-10-26 22:50:21,022 INFO L226 Difference]: Without dead ends: 34125 [2020-10-26 22:50:21,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:50:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34125 states. [2020-10-26 22:50:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34125 to 33971. [2020-10-26 22:50:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33971 states. [2020-10-26 22:50:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33971 states to 33971 states and 43726 transitions. [2020-10-26 22:50:21,820 INFO L78 Accepts]: Start accepts. Automaton has 33971 states and 43726 transitions. Word has length 286 [2020-10-26 22:50:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:21,821 INFO L481 AbstractCegarLoop]: Abstraction has 33971 states and 43726 transitions. [2020-10-26 22:50:21,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:50:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 33971 states and 43726 transitions. [2020-10-26 22:50:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-26 22:50:21,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:21,827 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:21,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:50:21,828 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash 120703900, now seen corresponding path program 1 times [2020-10-26 22:50:21,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:21,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889864687] [2020-10-26 22:50:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:21,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:24,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:24,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-26 22:50:24,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:24,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2763 [2020-10-26 22:50:24,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:50:24,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:50:24,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:24,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:24,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:24,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:24,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:24,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:24,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 22:50:24,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:24,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:24,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:24,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:25,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:25,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:25,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:25,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 22:50:25,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:25,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:25,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:25,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:50:25,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:25,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:25,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:25,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:25,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:50:25,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:25,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 22:50:25,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:25,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:50:25,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:50:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:50:25,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889864687] [2020-10-26 22:50:25,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:25,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:50:25,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962422786] [2020-10-26 22:50:25,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:50:25,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:50:25,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:50:25,443 INFO L87 Difference]: Start difference. First operand 33971 states and 43726 transitions. Second operand 7 states. [2020-10-26 22:50:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:48,168 INFO L93 Difference]: Finished difference Result 81195 states and 109016 transitions. [2020-10-26 22:50:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:50:48,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 304 [2020-10-26 22:50:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:48,320 INFO L225 Difference]: With dead ends: 81195 [2020-10-26 22:50:48,321 INFO L226 Difference]: Without dead ends: 47997 [2020-10-26 22:50:48,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:50:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47997 states. [2020-10-26 22:50:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47997 to 44652. [2020-10-26 22:50:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44652 states. [2020-10-26 22:50:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44652 states to 44652 states and 57625 transitions. [2020-10-26 22:50:49,998 INFO L78 Accepts]: Start accepts. Automaton has 44652 states and 57625 transitions. Word has length 304 [2020-10-26 22:50:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:49,999 INFO L481 AbstractCegarLoop]: Abstraction has 44652 states and 57625 transitions. [2020-10-26 22:50:49,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:50:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 44652 states and 57625 transitions. [2020-10-26 22:50:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-26 22:50:50,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:50,016 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-10-26 22:50:50,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:50:50,016 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1628320298, now seen corresponding path program 1 times [2020-10-26 22:50:50,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:50,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020719615] [2020-10-26 22:50:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:50,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:50,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 445 [2020-10-26 22:50:54,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:54,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3916 [2020-10-26 22:50:54,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 22:50:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:50:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-26 22:50:54,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:54,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:54,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:54,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:54,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:50:54,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:54,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:54,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:54,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:54,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:54,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 22:50:54,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:50:54,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:54,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:54,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 22:50:54,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:54,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 22:50:54,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:54,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:54,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 22:50:54,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:54,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-10-26 22:50:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:54,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:54,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 22:50:54,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 22:50:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:50:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:50:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 271 proven. 117 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-26 22:50:55,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020719615] [2020-10-26 22:50:55,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:55,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:50:55,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56169892] [2020-10-26 22:50:55,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:50:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:50:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:50:55,104 INFO L87 Difference]: Start difference. First operand 44652 states and 57625 transitions. Second operand 8 states. [2020-10-26 22:50:55,262 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:58,534 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68