/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=DEEPEST --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/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:24:39,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:24:39,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:24:39,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:24:39,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:24:39,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:24:39,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:24:39,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:24:39,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:24:39,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:24:40,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:24:40,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:24:40,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:24:40,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:24:40,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:24:40,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:24:40,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:24:40,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:24:40,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:24:40,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:24:40,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:24:40,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:24:40,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:24:40,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:24:40,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:24:40,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:24:40,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:24:40,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:24:40,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:24:40,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:24:40,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:24:40,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:24:40,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:24:40,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:24:40,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:24:40,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:24:40,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:24:40,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:24:40,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:24:40,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:24:40,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:24:40,054 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 [2020-10-27 20:24:40,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:24:40,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:24:40,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:24:40,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:24:40,085 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:24:40,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:24:40,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:24:40,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:24:40,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:24:40,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:24:40,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:24:40,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:24:40,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:24:40,087 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:24:40,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:24:40,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:24:40,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:24:40,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:24:40,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:24:40,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:24:40,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:24:40,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:24:40,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:24:40,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:24:40,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:24:40,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:24:40,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:24:40,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:24:40,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:24:40,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:24:40,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:24:40,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:24:40,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:24:40,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:24:40,657 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:24:40,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-27 20:24:40,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab1bc7ab2/43aac63b12d74eba8188c580b3f61c8d/FLAG3af3a061e [2020-10-27 20:24:41,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:24:41,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-27 20:24:41,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab1bc7ab2/43aac63b12d74eba8188c580b3f61c8d/FLAG3af3a061e [2020-10-27 20:24:41,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab1bc7ab2/43aac63b12d74eba8188c580b3f61c8d [2020-10-27 20:24:41,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:24:41,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:24:41,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:24:41,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:24:41,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:24:41,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:24:41" (1/1) ... [2020-10-27 20:24:41,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d8de121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:41, skipping insertion in model container [2020-10-27 20:24:41,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:24:41" (1/1) ... [2020-10-27 20:24:41,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:24:41,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:24:41,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:24:41,969 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:24:41,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:24:42,005 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:24:42,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42 WrapperNode [2020-10-27 20:24:42,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:24:42,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:24:42,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:24:42,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:24:42,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (1/1) ... [2020-10-27 20:24:42,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (1/1) ... [2020-10-27 20:24:42,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (1/1) ... [2020-10-27 20:24:42,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (1/1) ... [2020-10-27 20:24:42,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (1/1) ... [2020-10-27 20:24:42,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (1/1) ... [2020-10-27 20:24:42,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (1/1) ... [2020-10-27 20:24:42,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:24:42,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:24:42,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:24:42,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:24:42,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (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 [2020-10-27 20:24:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:24:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:24:42,123 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:24:42,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:24:42,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:24:42,124 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:24:42,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:24:42,125 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:24:42,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:24:42,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:24:42,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:24:42,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:24:42,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:24:42,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:24:42,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:24:42,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:24:42,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:24:42,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:24:42,405 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:24:42,406 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 20:24:42,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:24:42 BoogieIcfgContainer [2020-10-27 20:24:42,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:24:42,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:24:42,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:24:42,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:24:42,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:24:41" (1/3) ... [2020-10-27 20:24:42,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68361b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:24:42, skipping insertion in model container [2020-10-27 20:24:42,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:24:42" (2/3) ... [2020-10-27 20:24:42,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68361b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:24:42, skipping insertion in model container [2020-10-27 20:24:42,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:24:42" (3/3) ... [2020-10-27 20:24:42,417 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2020-10-27 20:24:42,430 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:24:42,436 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:24:42,452 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:24:42,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:24:42,515 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:24:42,516 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:24:42,516 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:24:42,516 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:24:42,516 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:24:42,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:24:42,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:24:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 20:24:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:24:42,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:42,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:42,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2036788406, now seen corresponding path program 1 times [2020-10-27 20:24:42,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:42,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247531408] [2020-10-27 20:24:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:42,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:43,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:24:43,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:43,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-27 20:24:43,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:24:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:43,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:24:43,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:43,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:43,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:43,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:43,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:24:43,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:43,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:43,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:43,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247531408] [2020-10-27 20:24:43,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:24:43,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:24:43,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53048739] [2020-10-27 20:24:43,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:24:43,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:43,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:24:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:24:43,647 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-27 20:24:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:43,722 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2020-10-27 20:24:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:24:43,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 20:24:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:43,733 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:24:43,734 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:24:43,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:24:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:24:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:24:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:24:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-27 20:24:43,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 17 [2020-10-27 20:24:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:43,787 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-27 20:24:43,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:24:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-27 20:24:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:24:43,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:43,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:43,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:24:43,789 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:43,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1513226318, now seen corresponding path program 1 times [2020-10-27 20:24:43,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:43,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715354891] [2020-10-27 20:24:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:43,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:43,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:44,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:44,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:24:44,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:24:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-27 20:24:44,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:44,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:24:44,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:24:44,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:24:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:44,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:44,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:44,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:44,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:44,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:44,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715354891] [2020-10-27 20:24:44,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:24:44,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:24:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732839041] [2020-10-27 20:24:44,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:24:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:24:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:24:44,312 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2020-10-27 20:24:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:44,570 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-10-27 20:24:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:24:44,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:24:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:44,573 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:24:44,573 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:24:44,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:24:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 20:24:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:24:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-10-27 20:24:44,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 17 [2020-10-27 20:24:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:44,593 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-10-27 20:24:44,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:24:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-10-27 20:24:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:24:44,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:44,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:44,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:24:44,594 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1403961586, now seen corresponding path program 1 times [2020-10-27 20:24:44,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:44,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576562837] [2020-10-27 20:24:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:44,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:44,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:44,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:44,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:45,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:24:45,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:24:45,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-27 20:24:45,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:45,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:24:45,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:24:45,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:24:45,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:45,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:45,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:45,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:24:45,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576562837] [2020-10-27 20:24:45,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:24:45,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:24:45,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559138862] [2020-10-27 20:24:45,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:24:45,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:24:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:24:45,093 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 4 states. [2020-10-27 20:24:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:45,184 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-10-27 20:24:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:24:45,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:24:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:45,198 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:24:45,199 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:24:45,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:24:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 20:24:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:24:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2020-10-27 20:24:45,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2020-10-27 20:24:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:45,209 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2020-10-27 20:24:45,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:24:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2020-10-27 20:24:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:24:45,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:45,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:45,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:24:45,211 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1941968995, now seen corresponding path program 1 times [2020-10-27 20:24:45,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:45,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108763150] [2020-10-27 20:24:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:45,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:24:45,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 20:24:45,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:24:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:24:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:24:45,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:45,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:45,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:45,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:24:45,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:45,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:45,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:24:45,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108763150] [2020-10-27 20:24:45,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:24:45,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:24:45,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482794155] [2020-10-27 20:24:45,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:24:45,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:45,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:24:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:24:45,332 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 4 states. [2020-10-27 20:24:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:45,424 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2020-10-27 20:24:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:24:45,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:24:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:45,426 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:24:45,426 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:24:45,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:24:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 20:24:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:24:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-10-27 20:24:45,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 18 [2020-10-27 20:24:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:45,435 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-10-27 20:24:45,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:24:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-10-27 20:24:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:24:45,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:45,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:45,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:24:45,437 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2026308622, now seen corresponding path program 1 times [2020-10-27 20:24:45,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:45,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677732607] [2020-10-27 20:24:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:45,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:24:45,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:45,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 20:24:45,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:45,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:24:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:24:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:24:45,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:45,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:45,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:24:45,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:45,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:24:45,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677732607] [2020-10-27 20:24:45,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:45,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:24:45,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837493378] [2020-10-27 20:24:45,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:45,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:45,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:45,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:45,656 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 5 states. [2020-10-27 20:24:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:45,810 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-27 20:24:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:24:45,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 20:24:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:45,811 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:24:45,811 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:24:45,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:24:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 20:24:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:24:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-27 20:24:45,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 19 [2020-10-27 20:24:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:45,819 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-27 20:24:45,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-10-27 20:24:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:24:45,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:45,820 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] [2020-10-27 20:24:45,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:24:45,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash -400087100, now seen corresponding path program 1 times [2020-10-27 20:24:45,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:45,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465130212] [2020-10-27 20:24:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:45,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:46,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:24:46,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:46,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 20:24:46,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:24:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:24:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:24:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:46,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:46,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:46,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:46,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:24:46,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:24:46,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465130212] [2020-10-27 20:24:46,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:24:46,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:24:46,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931832568] [2020-10-27 20:24:46,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:46,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:46,283 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2020-10-27 20:24:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:46,492 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-10-27 20:24:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:24:46,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 20:24:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:46,494 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:24:46,494 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:24:46,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:24:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:24:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 20:24:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:24:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-10-27 20:24:46,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2020-10-27 20:24:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:46,506 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-10-27 20:24:46,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-10-27 20:24:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:24:46,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:46,509 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] [2020-10-27 20:24:46,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:24:46,509 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash 527673329, now seen corresponding path program 1 times [2020-10-27 20:24:46,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:46,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675817815] [2020-10-27 20:24:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:46,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:46,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:24:46,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:46,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 20:24:46,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:24:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:24:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:24:46,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:46,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:46,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:46,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:46,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:46,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:24:46,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:46,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:46,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:46,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:46,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:46,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675817815] [2020-10-27 20:24:46,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:46,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:24:46,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941792902] [2020-10-27 20:24:46,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:46,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:46,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:46,743 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-10-27 20:24:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:46,890 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-10-27 20:24:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:24:46,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 20:24:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:46,892 INFO L225 Difference]: With dead ends: 35 [2020-10-27 20:24:46,892 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:24:46,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:24:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 20:24:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:24:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-27 20:24:46,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 21 [2020-10-27 20:24:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:46,899 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-27 20:24:46,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-27 20:24:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:24:46,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:46,901 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] [2020-10-27 20:24:46,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:24:46,901 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1065680738, now seen corresponding path program 1 times [2020-10-27 20:24:46,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:46,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73144284] [2020-10-27 20:24:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:46,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:47,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:24:47,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:24:47,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 20:24:47,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:24:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:24:47,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:24:47,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:47,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:47,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:47,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:47,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:47,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:47,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:47,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:47,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:47,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:47,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73144284] [2020-10-27 20:24:47,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:47,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:24:47,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072806583] [2020-10-27 20:24:47,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:47,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:47,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:47,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:47,076 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-10-27 20:24:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:47,209 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-27 20:24:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:24:47,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 20:24:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:47,212 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:24:47,212 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:24:47,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:24:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-27 20:24:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:24:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-27 20:24:47,220 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 21 [2020-10-27 20:24:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:47,221 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-27 20:24:47,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-27 20:24:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:24:47,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:47,222 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] [2020-10-27 20:24:47,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:24:47,222 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:47,223 INFO L82 PathProgramCache]: Analyzing trace with hash -254298302, now seen corresponding path program 1 times [2020-10-27 20:24:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:47,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127875500] [2020-10-27 20:24:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:47,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:48,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:24:48,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:24:48,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-27 20:24:48,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:24:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:24:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:24:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:48,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:48,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:48,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:48,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:48,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:48,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:48,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:48,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127875500] [2020-10-27 20:24:48,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:48,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:24:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473404946] [2020-10-27 20:24:48,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:24:48,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:24:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:48,175 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 7 states. [2020-10-27 20:24:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:48,490 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2020-10-27 20:24:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:24:48,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 20:24:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:48,494 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:24:48,494 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:24:48,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:24:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:24:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-27 20:24:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:24:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-10-27 20:24:48,512 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 22 [2020-10-27 20:24:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:48,512 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-10-27 20:24:48,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:24:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-10-27 20:24:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:24:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:48,516 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:48,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:24:48,517 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -776524444, now seen corresponding path program 2 times [2020-10-27 20:24:48,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:48,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415717351] [2020-10-27 20:24:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:48,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:50,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:50,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:24:50,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:50,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-27 20:24:50,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:24:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:24:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:24:50,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:50,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:50,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:50,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:50,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:50,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:50,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:50,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:50,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:24:50,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415717351] [2020-10-27 20:24:50,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:50,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:24:50,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493063096] [2020-10-27 20:24:50,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:24:50,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:50,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:24:50,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:24:50,766 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 10 states. [2020-10-27 20:24:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:51,266 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-10-27 20:24:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:24:51,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-27 20:24:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:51,268 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:24:51,268 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 20:24:51,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:24:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 20:24:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-27 20:24:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:24:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2020-10-27 20:24:51,278 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 22 [2020-10-27 20:24:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:51,278 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2020-10-27 20:24:51,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:24:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2020-10-27 20:24:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:24:51,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:51,279 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:51,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:24:51,280 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:51,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1776024418, now seen corresponding path program 2 times [2020-10-27 20:24:51,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:51,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215572200] [2020-10-27 20:24:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:51,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:51,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:24:51,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:24:51,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-27 20:24:51,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:24:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:24:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:24:51,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:51,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:51,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:51,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:51,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:51,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:51,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:24:51,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:51,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:51,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:51,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:51,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:51,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215572200] [2020-10-27 20:24:51,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:51,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:24:51,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462435938] [2020-10-27 20:24:51,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:51,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:51,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:51,810 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand 5 states. [2020-10-27 20:24:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:51,959 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2020-10-27 20:24:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:24:51,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 20:24:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:51,960 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:24:51,960 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:24:51,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:51,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:24:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 20:24:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:24:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2020-10-27 20:24:51,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 23 [2020-10-27 20:24:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:51,976 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2020-10-27 20:24:51,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2020-10-27 20:24:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:24:51,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:51,979 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:51,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:24:51,979 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:51,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1274384913, now seen corresponding path program 3 times [2020-10-27 20:24:51,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:51,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41452884] [2020-10-27 20:24:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:52,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:52,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:52,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:24:52,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:52,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 20:24:52,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:52,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:24:52,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:24:52,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:24:52,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:52,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:52,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:52,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:52,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:52,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:52,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:24:52,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:52,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:52,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41452884] [2020-10-27 20:24:52,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:52,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:24:52,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959110185] [2020-10-27 20:24:52,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:24:52,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:52,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:24:52,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:24:52,180 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 5 states. [2020-10-27 20:24:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:52,338 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2020-10-27 20:24:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:24:52,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 20:24:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:52,339 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:24:52,339 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:24:52,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:24:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 20:24:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:24:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2020-10-27 20:24:52,357 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 23 [2020-10-27 20:24:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:52,360 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2020-10-27 20:24:52,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:24:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2020-10-27 20:24:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:24:52,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:52,361 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:52,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:24:52,361 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1743017553, now seen corresponding path program 3 times [2020-10-27 20:24:52,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:52,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007894874] [2020-10-27 20:24:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:52,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:52,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:52,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:24:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-27 20:24:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:24:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:24:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:24:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:53,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:53,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:53,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:53,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:53,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:53,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:53,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:24:53,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007894874] [2020-10-27 20:24:53,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:53,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:24:53,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359774296] [2020-10-27 20:24:53,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:24:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:24:53,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:53,287 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 7 states. [2020-10-27 20:24:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:53,627 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-27 20:24:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:24:53,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-27 20:24:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:53,628 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:24:53,628 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:24:53,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:24:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:24:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-10-27 20:24:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:24:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-27 20:24:53,639 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 23 [2020-10-27 20:24:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:53,640 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-27 20:24:53,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:24:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-27 20:24:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:24:53,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:53,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:53,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:24:53,642 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1084055950, now seen corresponding path program 2 times [2020-10-27 20:24:53,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:53,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617747536] [2020-10-27 20:24:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:53,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:53,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:53,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:53,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:53,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:54,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:54,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:24:54,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:54,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-27 20:24:54,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:54,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:24:54,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:24:54,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:24:54,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:54,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:54,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:54,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:54,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:54,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:54,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:54,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:54,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:54,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:24:54,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617747536] [2020-10-27 20:24:54,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:54,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:24:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909427890] [2020-10-27 20:24:54,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:24:54,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:24:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:24:54,433 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-10-27 20:24:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:54,653 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2020-10-27 20:24:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:24:54,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 20:24:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:54,654 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:24:54,654 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:24:54,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:24:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-27 20:24:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:24:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2020-10-27 20:24:54,664 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 23 [2020-10-27 20:24:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:54,666 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2020-10-27 20:24:54,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:24:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2020-10-27 20:24:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:24:54,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:54,668 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:54,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:24:54,669 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash -304574252, now seen corresponding path program 3 times [2020-10-27 20:24:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:54,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870304722] [2020-10-27 20:24:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:54,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:54,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:54,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:54,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:55,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:55,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:24:55,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:55,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-27 20:24:55,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:24:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:24:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:24:55,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:56,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:56,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:56,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:56,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:56,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:56,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:56,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:24:56,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870304722] [2020-10-27 20:24:56,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:56,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:24:56,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803576973] [2020-10-27 20:24:56,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:24:56,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:24:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:24:56,106 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand 7 states. [2020-10-27 20:24:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:56,452 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-10-27 20:24:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:24:56,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 20:24:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:56,453 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:24:56,454 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:24:56,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:24:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:24:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-10-27 20:24:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:24:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2020-10-27 20:24:56,470 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 24 [2020-10-27 20:24:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:56,470 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2020-10-27 20:24:56,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:24:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2020-10-27 20:24:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:24:56,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:56,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:56,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:24:56,472 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1758336626, now seen corresponding path program 4 times [2020-10-27 20:24:56,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:56,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468206058] [2020-10-27 20:24:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:56,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:56,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:56,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:56,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:24:56,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:24:56,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-27 20:24:56,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:24:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:24:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:24:56,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:57,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:57,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:57,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:57,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:57,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:57,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:24:57,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:57,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:57,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:57,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:57,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:24:57,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468206058] [2020-10-27 20:24:57,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:57,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:24:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324908120] [2020-10-27 20:24:57,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:24:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:24:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:24:57,131 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand 9 states. [2020-10-27 20:24:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:24:57,817 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-10-27 20:24:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:24:57,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 20:24:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:24:57,819 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:24:57,820 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:24:57,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:24:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:24:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-27 20:24:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:24:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-10-27 20:24:57,828 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 25 [2020-10-27 20:24:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:24:57,829 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-10-27 20:24:57,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:24:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-10-27 20:24:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:24:57,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:24:57,829 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:24:57,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:24:57,830 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:24:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:24:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1910445390, now seen corresponding path program 4 times [2020-10-27 20:24:57,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:24:57,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026002107] [2020-10-27 20:24:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:24:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:57,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:57,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:58,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:59,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:59,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:24:59,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:24:59,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-27 20:24:59,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:24:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:24:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:24:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:59,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:24:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:24:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:24:59,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:24:59,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:24:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:24:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:24:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:24:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:24:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:24:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:24:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:24:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:24:59,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026002107] [2020-10-27 20:24:59,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:24:59,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:24:59,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581900322] [2020-10-27 20:24:59,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:24:59,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:24:59,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:24:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:24:59,574 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-10-27 20:25:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:00,011 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2020-10-27 20:25:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:25:00,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 20:25:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:00,013 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:25:00,013 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:25:00,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:25:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:25:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-10-27 20:25:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:25:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2020-10-27 20:25:00,025 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 25 [2020-10-27 20:25:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:00,026 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2020-10-27 20:25:00,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:25:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2020-10-27 20:25:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:25:00,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:00,027 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:00,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:25:00,027 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:00,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:00,028 INFO L82 PathProgramCache]: Analyzing trace with hash -772735982, now seen corresponding path program 4 times [2020-10-27 20:25:00,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:00,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523810369] [2020-10-27 20:25:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:00,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:00,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:00,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:00,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:25:00,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:00,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 20:25:00,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:00,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:25:00,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:25:00,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:25:00,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:00,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:00,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:00,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:00,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:00,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:00,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:00,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:00,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:00,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:00,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:00,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:25:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523810369] [2020-10-27 20:25:00,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:00,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:25:00,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684624502] [2020-10-27 20:25:00,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:25:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:00,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:25:00,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:25:00,374 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 6 states. [2020-10-27 20:25:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:00,600 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-10-27 20:25:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:25:00,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-27 20:25:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:00,601 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:25:00,601 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:25:00,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:25:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-27 20:25:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:25:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-10-27 20:25:00,611 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 25 [2020-10-27 20:25:00,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:00,612 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-10-27 20:25:00,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:25:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-10-27 20:25:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:25:00,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:00,612 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:00,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:25:00,613 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:00,613 INFO L82 PathProgramCache]: Analyzing trace with hash -152843116, now seen corresponding path program 5 times [2020-10-27 20:25:00,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:00,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822338765] [2020-10-27 20:25:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:00,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:00,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:01,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:02,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:02,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:25:02,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:02,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2080 [2020-10-27 20:25:02,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:02,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:25:02,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:25:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:25:02,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:02,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:02,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:02,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:02,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:02,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:02,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:25:02,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:02,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:25:02,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822338765] [2020-10-27 20:25:02,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:02,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:25:02,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670926550] [2020-10-27 20:25:02,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:25:02,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:25:02,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:02,860 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 9 states. [2020-10-27 20:25:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:03,374 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2020-10-27 20:25:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:25:03,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 20:25:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:03,375 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:25:03,375 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 20:25:03,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:25:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 20:25:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-10-27 20:25:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:25:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-10-27 20:25:03,385 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 26 [2020-10-27 20:25:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:03,385 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-10-27 20:25:03,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:25:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-10-27 20:25:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:25:03,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:03,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:03,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:25:03,387 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:03,387 INFO L82 PathProgramCache]: Analyzing trace with hash 218402755, now seen corresponding path program 5 times [2020-10-27 20:25:03,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:03,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786174994] [2020-10-27 20:25:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:03,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:03,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:03,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:03,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:25:03,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:03,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 20:25:03,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:03,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:25:03,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:25:03,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:25:03,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:03,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:03,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:03,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:03,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:03,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:03,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:03,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:03,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:03,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:25:03,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786174994] [2020-10-27 20:25:03,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:03,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:25:03,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408158661] [2020-10-27 20:25:03,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:25:03,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:25:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:25:03,725 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 7 states. [2020-10-27 20:25:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:04,002 INFO L93 Difference]: Finished difference Result 115 states and 170 transitions. [2020-10-27 20:25:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:25:04,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-27 20:25:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:04,004 INFO L225 Difference]: With dead ends: 115 [2020-10-27 20:25:04,004 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:25:04,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:25:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:25:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-10-27 20:25:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:25:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2020-10-27 20:25:04,013 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 26 [2020-10-27 20:25:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:04,013 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2020-10-27 20:25:04,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:25:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2020-10-27 20:25:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:25:04,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:04,014 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:04,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:25:04,014 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:04,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1605706608, now seen corresponding path program 6 times [2020-10-27 20:25:04,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:04,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125924581] [2020-10-27 20:25:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:04,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:04,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:04,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:04,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:05,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:05,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:25:05,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:25:05,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-27 20:25:05,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:05,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:25:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:25:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:25:05,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:05,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:05,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:05,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:05,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:05,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:25:05,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125924581] [2020-10-27 20:25:05,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:05,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:25:05,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794941462] [2020-10-27 20:25:05,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:25:05,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:05,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:25:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:25:05,238 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand 10 states. [2020-10-27 20:25:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:06,314 INFO L93 Difference]: Finished difference Result 112 states and 145 transitions. [2020-10-27 20:25:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:25:06,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 20:25:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:06,317 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:25:06,317 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:25:06,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:25:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:25:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2020-10-27 20:25:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:25:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-10-27 20:25:06,336 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 27 [2020-10-27 20:25:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:06,336 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-10-27 20:25:06,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:25:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-10-27 20:25:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:25:06,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:06,337 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:06,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:25:06,337 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:06,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1501747470, now seen corresponding path program 6 times [2020-10-27 20:25:06,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:06,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193114625] [2020-10-27 20:25:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:06,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:06,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:06,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:06,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:06,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:08,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:08,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:25:08,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2024 [2020-10-27 20:25:08,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:25:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:25:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:25:08,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:25:08,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:08,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:08,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:08,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:08,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:08,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:25:08,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:08,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:08,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:08,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:08,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:25:08,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193114625] [2020-10-27 20:25:08,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:08,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:25:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350698438] [2020-10-27 20:25:08,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:25:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:25:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:25:08,575 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 10 states. [2020-10-27 20:25:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:09,282 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2020-10-27 20:25:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:25:09,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 20:25:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:09,288 INFO L225 Difference]: With dead ends: 121 [2020-10-27 20:25:09,288 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 20:25:09,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:25:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 20:25:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2020-10-27 20:25:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 20:25:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2020-10-27 20:25:09,296 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 27 [2020-10-27 20:25:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:09,296 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2020-10-27 20:25:09,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:25:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2020-10-27 20:25:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:25:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:09,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:09,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:25:09,304 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:09,304 INFO L82 PathProgramCache]: Analyzing trace with hash 878932530, now seen corresponding path program 7 times [2020-10-27 20:25:09,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:09,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208649183] [2020-10-27 20:25:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:09,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:09,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:09,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:10,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:10,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:25:10,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:25:10,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-27 20:25:10,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:25:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:25:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:25:10,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:10,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:10,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:10,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:10,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:10,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:25:10,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:10,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:10,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:25:10,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208649183] [2020-10-27 20:25:10,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:10,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:25:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129823793] [2020-10-27 20:25:10,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:25:10,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:25:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:25:10,796 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand 8 states. [2020-10-27 20:25:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:11,276 INFO L93 Difference]: Finished difference Result 232 states and 324 transitions. [2020-10-27 20:25:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:25:11,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 20:25:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:11,279 INFO L225 Difference]: With dead ends: 232 [2020-10-27 20:25:11,279 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 20:25:11,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:25:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 20:25:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2020-10-27 20:25:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:25:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2020-10-27 20:25:11,295 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 27 [2020-10-27 20:25:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:11,295 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2020-10-27 20:25:11,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:25:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2020-10-27 20:25:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:25:11,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:11,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:11,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:25:11,296 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash -274906990, now seen corresponding path program 8 times [2020-10-27 20:25:11,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:11,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737648848] [2020-10-27 20:25:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:11,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:11,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:11,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:11,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:14,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:14,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:25:14,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:25:14,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3225 [2020-10-27 20:25:14,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:25:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:25:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:25:14,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:14,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:14,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:14,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:14,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:14,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:14,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:14,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:14,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:25:14,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737648848] [2020-10-27 20:25:14,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:14,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:25:14,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763702038] [2020-10-27 20:25:14,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:25:14,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:14,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:25:14,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:14,660 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 9 states. [2020-10-27 20:25:17,242 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-27 20:25:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:17,807 INFO L93 Difference]: Finished difference Result 160 states and 213 transitions. [2020-10-27 20:25:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:25:17,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 20:25:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:17,810 INFO L225 Difference]: With dead ends: 160 [2020-10-27 20:25:17,810 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 20:25:17,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:25:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 20:25:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2020-10-27 20:25:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 20:25:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2020-10-27 20:25:17,820 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 27 [2020-10-27 20:25:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:17,820 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2020-10-27 20:25:17,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:25:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2020-10-27 20:25:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:25:17,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:17,821 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:17,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:25:17,822 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash -106412446, now seen corresponding path program 7 times [2020-10-27 20:25:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:17,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623430802] [2020-10-27 20:25:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:17,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:18,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:18,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:19,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:19,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:25:19,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:19,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2132 [2020-10-27 20:25:19,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:19,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:25:19,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:25:19,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:25:19,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:20,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:20,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:20,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:20,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:20,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:20,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:25:20,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:20,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:20,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:20,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:20,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:25:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623430802] [2020-10-27 20:25:20,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:20,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:25:20,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540438522] [2020-10-27 20:25:20,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:25:20,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:25:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:25:20,264 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand 11 states. [2020-10-27 20:25:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:21,233 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2020-10-27 20:25:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:25:21,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 20:25:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:21,235 INFO L225 Difference]: With dead ends: 136 [2020-10-27 20:25:21,235 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:25:21,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:25:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:25:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2020-10-27 20:25:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 20:25:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2020-10-27 20:25:21,255 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 29 [2020-10-27 20:25:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:21,256 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2020-10-27 20:25:21,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:25:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2020-10-27 20:25:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:25:21,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:21,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:21,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:25:21,257 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1157214620, now seen corresponding path program 9 times [2020-10-27 20:25:21,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:21,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355960642] [2020-10-27 20:25:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:21,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:21,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:21,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:21,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:22,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:22,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:25:22,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:25:22,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-27 20:25:22,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:22,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:25:22,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:22,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:25:22,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:22,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:22,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:22,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:22,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:22,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:22,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:22,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:25:22,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355960642] [2020-10-27 20:25:22,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:22,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:25:22,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982875691] [2020-10-27 20:25:22,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:25:22,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:25:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:25:22,947 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand 13 states. [2020-10-27 20:25:23,336 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 20:25:23,963 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-27 20:25:26,236 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 20:25:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:26,749 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2020-10-27 20:25:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:25:26,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 20:25:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:26,751 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:25:26,751 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:25:26,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=113, Invalid=536, Unknown=1, NotChecked=0, Total=650 [2020-10-27 20:25:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:25:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-27 20:25:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 20:25:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 152 transitions. [2020-10-27 20:25:26,760 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 152 transitions. Word has length 30 [2020-10-27 20:25:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:26,760 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 152 transitions. [2020-10-27 20:25:26,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:25:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 152 transitions. [2020-10-27 20:25:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:25:26,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:26,761 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:26,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:25:26,762 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:26,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:26,762 INFO L82 PathProgramCache]: Analyzing trace with hash -62396700, now seen corresponding path program 8 times [2020-10-27 20:25:26,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:26,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994804126] [2020-10-27 20:25:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:26,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:27,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:27,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:28,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:28,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:25:28,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:28,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1945 [2020-10-27 20:25:28,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:25:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:25:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:25:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:28,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:28,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:28,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:28,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:28,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:28,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:28,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:28,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:28,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:25:28,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994804126] [2020-10-27 20:25:28,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:28,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:25:28,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485213690] [2020-10-27 20:25:28,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:25:28,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:25:28,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:25:28,987 INFO L87 Difference]: Start difference. First operand 111 states and 152 transitions. Second operand 12 states. [2020-10-27 20:25:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:30,022 INFO L93 Difference]: Finished difference Result 147 states and 207 transitions. [2020-10-27 20:25:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:25:30,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 20:25:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:30,024 INFO L225 Difference]: With dead ends: 147 [2020-10-27 20:25:30,024 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 20:25:30,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:25:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 20:25:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 121. [2020-10-27 20:25:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 20:25:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2020-10-27 20:25:30,034 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 30 [2020-10-27 20:25:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:30,034 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2020-10-27 20:25:30,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:25:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2020-10-27 20:25:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:25:30,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:30,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:30,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:25:30,035 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:30,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:30,036 INFO L82 PathProgramCache]: Analyzing trace with hash -308776060, now seen corresponding path program 10 times [2020-10-27 20:25:30,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:30,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681203053] [2020-10-27 20:25:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:30,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:30,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:30,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:25:30,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:30,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:30,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:30,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:25:30,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681203053] [2020-10-27 20:25:30,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:30,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:25:30,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756487528] [2020-10-27 20:25:30,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:25:30,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:25:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:25:30,964 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand 11 states. [2020-10-27 20:25:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:34,386 INFO L93 Difference]: Finished difference Result 135 states and 180 transitions. [2020-10-27 20:25:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:25:34,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 20:25:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:34,388 INFO L225 Difference]: With dead ends: 135 [2020-10-27 20:25:34,388 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 20:25:34,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:25:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 20:25:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2020-10-27 20:25:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:25:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2020-10-27 20:25:34,397 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 30 [2020-10-27 20:25:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:34,397 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2020-10-27 20:25:34,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:25:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2020-10-27 20:25:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:25:34,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:34,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:34,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:25:34,399 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:34,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1820028318, now seen corresponding path program 11 times [2020-10-27 20:25:34,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:34,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540326226] [2020-10-27 20:25:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:34,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:34,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:25:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:34,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:34,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:34,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:34,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 20:25:34,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540326226] [2020-10-27 20:25:34,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:34,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:25:34,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862642012] [2020-10-27 20:25:34,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:25:34,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:34,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:25:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:25:34,851 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 8 states. [2020-10-27 20:25:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:35,303 INFO L93 Difference]: Finished difference Result 184 states and 274 transitions. [2020-10-27 20:25:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:25:35,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 20:25:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:35,304 INFO L225 Difference]: With dead ends: 184 [2020-10-27 20:25:35,305 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 20:25:35,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:25:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 20:25:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2020-10-27 20:25:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 20:25:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 198 transitions. [2020-10-27 20:25:35,317 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 198 transitions. Word has length 30 [2020-10-27 20:25:35,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:35,317 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 198 transitions. [2020-10-27 20:25:35,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:25:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 198 transitions. [2020-10-27 20:25:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:25:35,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:35,318 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:35,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:25:35,319 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:35,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1302091426, now seen corresponding path program 9 times [2020-10-27 20:25:35,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:35,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402217947] [2020-10-27 20:25:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:35,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:35,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:36,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:37,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:37,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:25:37,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:25:37,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2299 [2020-10-27 20:25:37,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:37,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:25:37,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:25:37,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:25:37,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:37,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:37,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:37,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:37,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:37,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:37,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:37,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:25:37,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402217947] [2020-10-27 20:25:37,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:37,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:25:37,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071345767] [2020-10-27 20:25:37,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:25:37,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:25:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:25:37,936 INFO L87 Difference]: Start difference. First operand 145 states and 198 transitions. Second operand 13 states. [2020-10-27 20:25:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:39,207 INFO L93 Difference]: Finished difference Result 187 states and 261 transitions. [2020-10-27 20:25:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:25:39,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 20:25:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:39,210 INFO L225 Difference]: With dead ends: 187 [2020-10-27 20:25:39,210 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 20:25:39,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:25:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 20:25:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2020-10-27 20:25:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:25:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 216 transitions. [2020-10-27 20:25:39,225 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 216 transitions. Word has length 31 [2020-10-27 20:25:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:39,227 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 216 transitions. [2020-10-27 20:25:39,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:25:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 216 transitions. [2020-10-27 20:25:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:25:39,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:39,228 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:39,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:25:39,228 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2067445233, now seen corresponding path program 12 times [2020-10-27 20:25:39,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:39,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328693250] [2020-10-27 20:25:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:39,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:39,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:39,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:39,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:42,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:42,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:25:42,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:25:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2905 [2020-10-27 20:25:42,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:25:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:25:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:42,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:42,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:42,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:42,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:42,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:42,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:42,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 20:25:42,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328693250] [2020-10-27 20:25:42,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:42,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:25:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226125757] [2020-10-27 20:25:42,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:25:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:25:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:25:42,345 INFO L87 Difference]: Start difference. First operand 157 states and 216 transitions. Second operand 11 states. [2020-10-27 20:25:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:45,243 INFO L93 Difference]: Finished difference Result 263 states and 340 transitions. [2020-10-27 20:25:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:25:45,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 20:25:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:45,246 INFO L225 Difference]: With dead ends: 263 [2020-10-27 20:25:45,246 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 20:25:45,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:25:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 20:25:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 155. [2020-10-27 20:25:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 20:25:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 211 transitions. [2020-10-27 20:25:45,257 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 211 transitions. Word has length 31 [2020-10-27 20:25:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:45,258 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 211 transitions. [2020-10-27 20:25:45,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:25:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 211 transitions. [2020-10-27 20:25:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:25:45,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:45,259 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:45,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:25:45,259 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1095118718, now seen corresponding path program 13 times [2020-10-27 20:25:45,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:45,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927413805] [2020-10-27 20:25:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:45,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:45,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:45,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:45,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:46,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:46,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:25:46,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:25:46,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-27 20:25:46,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:25:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:46,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:25:46,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:46,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:46,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:46,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:46,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:46,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:46,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:46,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:46,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:46,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:46,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:46,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:25:46,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927413805] [2020-10-27 20:25:46,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:46,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:25:46,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712267368] [2020-10-27 20:25:46,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:25:46,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:46,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:25:46,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:25:46,672 INFO L87 Difference]: Start difference. First operand 155 states and 211 transitions. Second operand 7 states. [2020-10-27 20:25:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:47,089 INFO L93 Difference]: Finished difference Result 216 states and 284 transitions. [2020-10-27 20:25:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:25:47,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 20:25:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:47,091 INFO L225 Difference]: With dead ends: 216 [2020-10-27 20:25:47,091 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 20:25:47,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:25:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 20:25:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 140. [2020-10-27 20:25:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 20:25:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 189 transitions. [2020-10-27 20:25:47,110 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 189 transitions. Word has length 32 [2020-10-27 20:25:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:47,111 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 189 transitions. [2020-10-27 20:25:47,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:25:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 189 transitions. [2020-10-27 20:25:47,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:25:47,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:47,113 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:47,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:25:47,114 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1675838108, now seen corresponding path program 14 times [2020-10-27 20:25:47,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:47,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805780851] [2020-10-27 20:25:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:47,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:48,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:25:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:48,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:48,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:48,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:48,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 20:25:48,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805780851] [2020-10-27 20:25:48,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:48,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:25:48,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282791265] [2020-10-27 20:25:48,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:25:48,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:48,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:25:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:48,651 INFO L87 Difference]: Start difference. First operand 140 states and 189 transitions. Second operand 9 states. [2020-10-27 20:25:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:49,319 INFO L93 Difference]: Finished difference Result 211 states and 277 transitions. [2020-10-27 20:25:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:25:49,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-27 20:25:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:49,321 INFO L225 Difference]: With dead ends: 211 [2020-10-27 20:25:49,321 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 20:25:49,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:25:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 20:25:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2020-10-27 20:25:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 20:25:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2020-10-27 20:25:49,335 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 32 [2020-10-27 20:25:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:49,335 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2020-10-27 20:25:49,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:25:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2020-10-27 20:25:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:25:49,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:49,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:49,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:25:49,337 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:49,338 INFO L82 PathProgramCache]: Analyzing trace with hash -32003006, now seen corresponding path program 15 times [2020-10-27 20:25:49,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:49,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21231961] [2020-10-27 20:25:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:50,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:25:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:50,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:50,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:50,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:50,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:50,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:50,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:50,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 20:25:50,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21231961] [2020-10-27 20:25:50,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:50,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:25:50,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711222085] [2020-10-27 20:25:50,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:25:50,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:50,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:25:50,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:50,949 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand 9 states. [2020-10-27 20:25:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:51,537 INFO L93 Difference]: Finished difference Result 297 states and 405 transitions. [2020-10-27 20:25:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:25:51,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-27 20:25:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:51,539 INFO L225 Difference]: With dead ends: 297 [2020-10-27 20:25:51,539 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 20:25:51,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:25:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 20:25:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 124. [2020-10-27 20:25:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:25:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 167 transitions. [2020-10-27 20:25:51,549 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 167 transitions. Word has length 32 [2020-10-27 20:25:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:51,549 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 167 transitions. [2020-10-27 20:25:51,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:25:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 167 transitions. [2020-10-27 20:25:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:25:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:51,550 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:51,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:25:51,550 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash -437899485, now seen corresponding path program 16 times [2020-10-27 20:25:51,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:51,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988449789] [2020-10-27 20:25:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:51,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:51,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:51,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:51,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:25:51,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:25:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-27 20:25:51,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:25:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:25:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:25:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:52,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:52,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:52,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:52,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:52,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:52,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:25:52,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:52,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:52,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:52,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 20:25:52,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988449789] [2020-10-27 20:25:52,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:52,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:25:52,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687549767] [2020-10-27 20:25:52,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:25:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:25:52,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:25:52,153 INFO L87 Difference]: Start difference. First operand 124 states and 167 transitions. Second operand 9 states. [2020-10-27 20:25:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:52,731 INFO L93 Difference]: Finished difference Result 201 states and 297 transitions. [2020-10-27 20:25:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:25:52,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 20:25:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:52,734 INFO L225 Difference]: With dead ends: 201 [2020-10-27 20:25:52,735 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 20:25:52,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:25:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 20:25:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2020-10-27 20:25:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 20:25:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 202 transitions. [2020-10-27 20:25:52,745 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 202 transitions. Word has length 34 [2020-10-27 20:25:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:52,745 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 202 transitions. [2020-10-27 20:25:52,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:25:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 202 transitions. [2020-10-27 20:25:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:25:52,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:52,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:52,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:25:52,746 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:52,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:52,747 INFO L82 PathProgramCache]: Analyzing trace with hash -44930766, now seen corresponding path program 17 times [2020-10-27 20:25:52,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:52,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121473079] [2020-10-27 20:25:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:52,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:52,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2126 [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:25:54,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:55,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:25:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:55,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:55,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:25:55,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:25:55,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:25:55,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:25:55,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:25:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:25:55,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:25:55,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:25:55,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:25:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 20:25:55,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121473079] [2020-10-27 20:25:55,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:25:55,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:25:55,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871522739] [2020-10-27 20:25:55,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:25:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:25:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:25:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:25:55,185 INFO L87 Difference]: Start difference. First operand 151 states and 202 transitions. Second operand 14 states. [2020-10-27 20:25:56,325 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:25:57,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:25:57,974 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2020-10-27 20:25:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:25:57,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 20:25:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:25:57,977 INFO L225 Difference]: With dead ends: 184 [2020-10-27 20:25:57,977 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 20:25:57,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:25:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 20:25:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2020-10-27 20:25:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 20:25:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2020-10-27 20:25:57,987 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 35 [2020-10-27 20:25:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:25:57,987 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2020-10-27 20:25:57,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:25:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2020-10-27 20:25:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:25:57,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:25:57,988 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:25:57,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:25:57,988 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:25:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:25:57,989 INFO L82 PathProgramCache]: Analyzing trace with hash -580698830, now seen corresponding path program 18 times [2020-10-27 20:25:57,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:25:57,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104981666] [2020-10-27 20:25:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:25:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:25:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:58,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:25:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:02,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4285 [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:26:02,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:02,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:02,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:02,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:02,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:02,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:02,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:26:02,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:02,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:02,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:02,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:02,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 20:26:02,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104981666] [2020-10-27 20:26:02,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:02,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:26:02,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788685615] [2020-10-27 20:26:02,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:26:02,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:02,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:26:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:26:02,552 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand 13 states. [2020-10-27 20:26:04,900 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:26:06,597 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 56 [2020-10-27 20:26:06,988 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:26:07,489 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 20:26:12,699 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-27 20:26:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:13,254 INFO L93 Difference]: Finished difference Result 271 states and 343 transitions. [2020-10-27 20:26:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:26:13,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 20:26:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:13,256 INFO L225 Difference]: With dead ends: 271 [2020-10-27 20:26:13,257 INFO L226 Difference]: Without dead ends: 258 [2020-10-27 20:26:13,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=274, Invalid=1131, Unknown=1, NotChecked=0, Total=1406 [2020-10-27 20:26:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-27 20:26:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 149. [2020-10-27 20:26:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 20:26:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 196 transitions. [2020-10-27 20:26:13,270 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 196 transitions. Word has length 35 [2020-10-27 20:26:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:13,271 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 196 transitions. [2020-10-27 20:26:13,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:26:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 196 transitions. [2020-10-27 20:26:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:26:13,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:13,272 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:13,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:26:13,272 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1880993776, now seen corresponding path program 19 times [2020-10-27 20:26:13,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:13,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42452298] [2020-10-27 20:26:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:13,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:13,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:13,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3082 [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:26:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:19,879 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-10-27 20:26:26,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:26,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:26,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:26,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:26,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:26,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:26:26,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:26,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 20:26:26,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42452298] [2020-10-27 20:26:26,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:26,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:26:26,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140445298] [2020-10-27 20:26:26,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:26:26,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:26:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=237, Unknown=2, NotChecked=0, Total=272 [2020-10-27 20:26:26,367 INFO L87 Difference]: Start difference. First operand 149 states and 196 transitions. Second operand 17 states. [2020-10-27 20:26:35,589 WARN L193 SmtUtils]: Spent 4.67 s on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 20:26:47,880 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-27 20:26:55,571 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 20:27:05,204 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-27 20:27:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:12,596 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2020-10-27 20:27:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:27:12,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-27 20:27:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:12,598 INFO L225 Difference]: With dead ends: 165 [2020-10-27 20:27:12,598 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 20:27:12,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=124, Invalid=921, Unknown=11, NotChecked=0, Total=1056 [2020-10-27 20:27:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 20:27:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-27 20:27:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 20:27:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 195 transitions. [2020-10-27 20:27:12,607 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 195 transitions. Word has length 37 [2020-10-27 20:27:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:12,607 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 195 transitions. [2020-10-27 20:27:12,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:27:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 195 transitions. [2020-10-27 20:27:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:27:12,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:12,608 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:12,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:27:12,609 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1552820336, now seen corresponding path program 20 times [2020-10-27 20:27:12,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:12,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595043787] [2020-10-27 20:27:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:17,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:17,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:27:17,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:27:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:27:17,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:27:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:27:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:27:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:18,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:18,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:18,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:18,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:18,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:18,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:18,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:18,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:18,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:18,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:18,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 20:27:18,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595043787] [2020-10-27 20:27:18,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:18,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:27:18,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146905992] [2020-10-27 20:27:18,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:27:18,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:18,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:27:18,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:27:18,054 INFO L87 Difference]: Start difference. First operand 149 states and 195 transitions. Second operand 14 states. [2020-10-27 20:27:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:19,629 INFO L93 Difference]: Finished difference Result 196 states and 267 transitions. [2020-10-27 20:27:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:27:19,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 20:27:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:19,631 INFO L225 Difference]: With dead ends: 196 [2020-10-27 20:27:19,631 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 20:27:19,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:27:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 20:27:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 161. [2020-10-27 20:27:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 20:27:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 212 transitions. [2020-10-27 20:27:19,639 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 212 transitions. Word has length 37 [2020-10-27 20:27:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:19,640 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 212 transitions. [2020-10-27 20:27:19,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:27:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 212 transitions. [2020-10-27 20:27:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:27:19,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:19,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:19,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:27:19,641 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:19,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2028962994, now seen corresponding path program 21 times [2020-10-27 20:27:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:19,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491175236] [2020-10-27 20:27:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:19,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:19,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:20,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:21,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:21,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:27:21,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:27:21,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-27 20:27:21,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:27:21,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 20:27:21,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:27:21,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:21,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:21,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:21,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:21,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:21,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 20:27:21,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491175236] [2020-10-27 20:27:21,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:21,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705865163] [2020-10-27 20:27:21,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:21,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:27:21,981 INFO L87 Difference]: Start difference. First operand 161 states and 212 transitions. Second operand 10 states. [2020-10-27 20:27:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:22,788 INFO L93 Difference]: Finished difference Result 404 states and 538 transitions. [2020-10-27 20:27:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:22,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 20:27:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:22,791 INFO L225 Difference]: With dead ends: 404 [2020-10-27 20:27:22,791 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 20:27:22,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 20:27:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 161. [2020-10-27 20:27:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 20:27:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 214 transitions. [2020-10-27 20:27:22,802 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 214 transitions. Word has length 37 [2020-10-27 20:27:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:22,802 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 214 transitions. [2020-10-27 20:27:22,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 214 transitions. [2020-10-27 20:27:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:27:22,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:22,803 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:22,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:27:22,804 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:22,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1200290430, now seen corresponding path program 22 times [2020-10-27 20:27:22,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:22,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650648154] [2020-10-27 20:27:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:22,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:23,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:23,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:27:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-27 20:27:23,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:27:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:27:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:27:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:23,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:23,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 20:27:23,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650648154] [2020-10-27 20:27:23,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:23,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:23,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148806890] [2020-10-27 20:27:23,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:23,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:27:23,824 INFO L87 Difference]: Start difference. First operand 161 states and 214 transitions. Second operand 10 states. [2020-10-27 20:27:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:24,543 INFO L93 Difference]: Finished difference Result 249 states and 363 transitions. [2020-10-27 20:27:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:24,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 20:27:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:24,545 INFO L225 Difference]: With dead ends: 249 [2020-10-27 20:27:24,545 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 20:27:24,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:27:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 20:27:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191. [2020-10-27 20:27:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 20:27:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 252 transitions. [2020-10-27 20:27:24,557 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 252 transitions. Word has length 38 [2020-10-27 20:27:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:24,557 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 252 transitions. [2020-10-27 20:27:24,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 252 transitions. [2020-10-27 20:27:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:27:24,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:24,558 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:24,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:27:24,559 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash -963012800, now seen corresponding path program 23 times [2020-10-27 20:27:24,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:24,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520052341] [2020-10-27 20:27:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:24,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:24,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:29,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:27:29,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:27:29,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:27:29,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:29,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:27:29,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:27:29,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:27:29,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:30,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:30,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:30,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:30,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:30,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:30,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 20:27:30,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520052341] [2020-10-27 20:27:30,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:30,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:27:30,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644809245] [2020-10-27 20:27:30,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:27:30,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:30,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:27:30,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:30,020 INFO L87 Difference]: Start difference. First operand 191 states and 252 transitions. Second operand 15 states. [2020-10-27 20:27:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:31,625 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2020-10-27 20:27:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:27:31,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 20:27:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:31,628 INFO L225 Difference]: With dead ends: 252 [2020-10-27 20:27:31,628 INFO L226 Difference]: Without dead ends: 245 [2020-10-27 20:27:31,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:27:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-27 20:27:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 205. [2020-10-27 20:27:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 20:27:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 272 transitions. [2020-10-27 20:27:31,640 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 272 transitions. Word has length 39 [2020-10-27 20:27:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:31,641 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 272 transitions. [2020-10-27 20:27:31,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:27:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 272 transitions. [2020-10-27 20:27:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:27:31,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:31,642 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:31,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:27:31,642 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1604928529, now seen corresponding path program 24 times [2020-10-27 20:27:31,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:31,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037250072] [2020-10-27 20:27:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:31,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:31,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:31,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:32,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:36,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:36,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:27:36,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:27:36,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:27:36,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:36,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:27:36,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:27:36,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:27:36,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:36,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:36,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:36,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:36,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:27:36,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-27 20:27:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037250072] [2020-10-27 20:27:37,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:37,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:27:37,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530906815] [2020-10-27 20:27:37,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:27:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:27:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:37,002 INFO L87 Difference]: Start difference. First operand 205 states and 272 transitions. Second operand 15 states. [2020-10-27 20:27:38,481 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 20:27:41,467 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 3))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= .cse0 c_main_~y~0) (= |c_old(#valid)| |c_#valid|) (<= c_main_~y~0 .cse0) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-27 20:27:43,971 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 20:27:44,290 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:27:46,638 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 20:27:47,165 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:27:52,014 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 20:27:52,331 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-27 20:27:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:55,377 INFO L93 Difference]: Finished difference Result 423 states and 525 transitions. [2020-10-27 20:27:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:27:55,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 20:27:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:55,380 INFO L225 Difference]: With dead ends: 423 [2020-10-27 20:27:55,380 INFO L226 Difference]: Without dead ends: 404 [2020-10-27 20:27:55,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=369, Invalid=1703, Unknown=2, NotChecked=88, Total=2162 [2020-10-27 20:27:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-27 20:27:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 203. [2020-10-27 20:27:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 20:27:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 266 transitions. [2020-10-27 20:27:55,395 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 266 transitions. Word has length 39 [2020-10-27 20:27:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:55,395 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 266 transitions. [2020-10-27 20:27:55,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:27:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 266 transitions. [2020-10-27 20:27:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:27:55,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:55,396 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:55,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:27:55,396 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -302730588, now seen corresponding path program 25 times [2020-10-27 20:27:55,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:55,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978017416] [2020-10-27 20:27:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:55,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4843 [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:28:00,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:00,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:00,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:00,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:00,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:00,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:00,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 20:28:00,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978017416] [2020-10-27 20:28:00,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:00,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:28:00,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168990426] [2020-10-27 20:28:00,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:28:00,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:00,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:28:00,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:28:00,472 INFO L87 Difference]: Start difference. First operand 203 states and 266 transitions. Second operand 11 states. [2020-10-27 20:28:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:01,415 INFO L93 Difference]: Finished difference Result 319 states and 408 transitions. [2020-10-27 20:28:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:28:01,416 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-27 20:28:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:01,417 INFO L225 Difference]: With dead ends: 319 [2020-10-27 20:28:01,417 INFO L226 Difference]: Without dead ends: 255 [2020-10-27 20:28:01,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:28:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-27 20:28:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 182. [2020-10-27 20:28:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 20:28:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 237 transitions. [2020-10-27 20:28:01,431 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 237 transitions. Word has length 40 [2020-10-27 20:28:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:01,431 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 237 transitions. [2020-10-27 20:28:01,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:28:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 237 transitions. [2020-10-27 20:28:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:28:01,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:01,432 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:01,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:28:01,432 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1220256303, now seen corresponding path program 26 times [2020-10-27 20:28:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:01,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700687994] [2020-10-27 20:28:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:01,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:06,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:06,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:28:06,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:28:06,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:28:06,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:06,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:28:06,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:28:06,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:28:06,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:06,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:06,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:06,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:06,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:06,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:06,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:06,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-27 20:28:06,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700687994] [2020-10-27 20:28:06,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:06,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:28:06,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940471888] [2020-10-27 20:28:06,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:28:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:28:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:28:06,674 INFO L87 Difference]: Start difference. First operand 182 states and 237 transitions. Second operand 11 states. [2020-10-27 20:28:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:07,511 INFO L93 Difference]: Finished difference Result 279 states and 402 transitions. [2020-10-27 20:28:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:28:07,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 20:28:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:07,515 INFO L225 Difference]: With dead ends: 279 [2020-10-27 20:28:07,515 INFO L226 Difference]: Without dead ends: 245 [2020-10-27 20:28:07,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:28:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-27 20:28:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 203. [2020-10-27 20:28:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 20:28:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 266 transitions. [2020-10-27 20:28:07,528 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 266 transitions. Word has length 41 [2020-10-27 20:28:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:07,528 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 266 transitions. [2020-10-27 20:28:07,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:28:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 266 transitions. [2020-10-27 20:28:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:28:07,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:07,529 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:07,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:28:07,530 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash 182370660, now seen corresponding path program 27 times [2020-10-27 20:28:07,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:07,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951274125] [2020-10-27 20:28:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:07,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:07,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:07,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:28:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:28:12,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:12,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:12,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-27 20:28:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951274125] [2020-10-27 20:28:12,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:12,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:28:12,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924553729] [2020-10-27 20:28:12,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:28:12,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:28:12,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:28:12,829 INFO L87 Difference]: Start difference. First operand 203 states and 266 transitions. Second operand 13 states. [2020-10-27 20:28:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:14,214 INFO L93 Difference]: Finished difference Result 352 states and 444 transitions. [2020-10-27 20:28:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:28:14,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 20:28:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:14,217 INFO L225 Difference]: With dead ends: 352 [2020-10-27 20:28:14,217 INFO L226 Difference]: Without dead ends: 280 [2020-10-27 20:28:14,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:28:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-27 20:28:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 180. [2020-10-27 20:28:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 20:28:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 235 transitions. [2020-10-27 20:28:14,230 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 235 transitions. Word has length 42 [2020-10-27 20:28:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:14,231 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 235 transitions. [2020-10-27 20:28:14,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:28:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 235 transitions. [2020-10-27 20:28:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:28:14,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:14,232 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:14,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:28:14,232 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1070874302, now seen corresponding path program 28 times [2020-10-27 20:28:14,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:14,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482412976] [2020-10-27 20:28:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:14,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:15,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4024 [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:28:18,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:18,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:18,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:18,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:18,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:18,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:18,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:18,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:18,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 20:28:18,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482412976] [2020-10-27 20:28:18,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:18,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:28:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124300660] [2020-10-27 20:28:18,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:28:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:28:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:28:18,497 INFO L87 Difference]: Start difference. First operand 180 states and 235 transitions. Second operand 11 states. [2020-10-27 20:28:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:19,442 INFO L93 Difference]: Finished difference Result 484 states and 632 transitions. [2020-10-27 20:28:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:28:19,442 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 20:28:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:19,444 INFO L225 Difference]: With dead ends: 484 [2020-10-27 20:28:19,444 INFO L226 Difference]: Without dead ends: 307 [2020-10-27 20:28:19,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:28:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-27 20:28:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 191. [2020-10-27 20:28:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 20:28:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 248 transitions. [2020-10-27 20:28:19,457 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 248 transitions. Word has length 42 [2020-10-27 20:28:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:19,457 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 248 transitions. [2020-10-27 20:28:19,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:28:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 248 transitions. [2020-10-27 20:28:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:28:19,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:19,458 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:19,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:28:19,458 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1314852398, now seen corresponding path program 29 times [2020-10-27 20:28:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:19,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666444610] [2020-10-27 20:28:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:19,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:24,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:24,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:28:24,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:28:24,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:28:24,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:28:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:28:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:28:24,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:24,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:24,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:24,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:24,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:24,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:24,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-27 20:28:24,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666444610] [2020-10-27 20:28:24,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:24,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:28:24,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584116824] [2020-10-27 20:28:24,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:28:24,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:28:24,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:28:24,937 INFO L87 Difference]: Start difference. First operand 191 states and 248 transitions. Second operand 17 states. [2020-10-27 20:28:31,187 WARN L193 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 20:28:35,350 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 20:28:35,636 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61