/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/res1o.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:39:47,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:39:48,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:39:48,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:39:48,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:39:48,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:39:48,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:39:48,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:39:48,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:39:48,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:39:48,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:39:48,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:39:48,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:39:48,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:39:48,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:39:48,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:39:48,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:39:48,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:39:48,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:39:48,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:39:48,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:39:48,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:39:48,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:39:48,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:39:48,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:39:48,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:39:48,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:39:48,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:39:48,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:39:48,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:39:48,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:39:48,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:39:48,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:39:48,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:39:48,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:39:48,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:39:48,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:39:48,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:39:48,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:39:48,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:39:48,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:39:48,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:39:48,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:39:48,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:39:48,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:39:48,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:39:48,174 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:39:48,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:39:48,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:39:48,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:39:48,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:39:48,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:39:48,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:39:48,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:39:48,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:39:48,177 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:39:48,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:39:48,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:39:48,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:39:48,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:39:48,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:39:48,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:39:48,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:39:48,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:39:48,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:39:48,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:39:48,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:39:48,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:39:48,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:39:48,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:39:48,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:39:48,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:39:48,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:39:48,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:39:48,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:39:48,612 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:39:48,613 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:39:48,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1o.c [2020-10-26 19:39:48,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44e1d04f6/8290fc01dfec46148cce57fc30851e63/FLAG7d0867edc [2020-10-26 19:39:49,281 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:39:49,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1o.c [2020-10-26 19:39:49,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44e1d04f6/8290fc01dfec46148cce57fc30851e63/FLAG7d0867edc [2020-10-26 19:39:49,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44e1d04f6/8290fc01dfec46148cce57fc30851e63 [2020-10-26 19:39:49,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:39:49,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:39:49,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:39:49,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:39:49,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:39:49,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:39:49" (1/1) ... [2020-10-26 19:39:49,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da297ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:49, skipping insertion in model container [2020-10-26 19:39:49,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:39:49" (1/1) ... [2020-10-26 19:39:49,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:39:49,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:39:49,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:39:49,992 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:39:50,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:39:50,034 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:39:50,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50 WrapperNode [2020-10-26 19:39:50,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:39:50,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:39:50,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:39:50,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:39:50,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... [2020-10-26 19:39:50,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... [2020-10-26 19:39:50,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... [2020-10-26 19:39:50,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... [2020-10-26 19:39:50,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... [2020-10-26 19:39:50,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... [2020-10-26 19:39:50,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... [2020-10-26 19:39:50,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:39:50,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:39:50,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:39:50,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:39:50,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:39:50,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:39:50,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:39:50,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:39:50,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:39:50,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:39:50,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:39:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:39:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:39:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:39:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:39:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:39:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:39:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:39:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:39:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:39:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:39:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:39:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:39:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:39:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:39:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:39:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:39:50,568 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:39:50,568 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:39:50,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:39:50 BoogieIcfgContainer [2020-10-26 19:39:50,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:39:50,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:39:50,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:39:50,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:39:50,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:39:49" (1/3) ... [2020-10-26 19:39:50,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188400f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:39:50, skipping insertion in model container [2020-10-26 19:39:50,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:39:50" (2/3) ... [2020-10-26 19:39:50,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188400f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:39:50, skipping insertion in model container [2020-10-26 19:39:50,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:39:50" (3/3) ... [2020-10-26 19:39:50,579 INFO L111 eAbstractionObserver]: Analyzing ICFG res1o.c [2020-10-26 19:39:50,592 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:39:50,597 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:39:50,610 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:39:50,636 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:39:50,636 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:39:50,636 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:39:50,637 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:39:50,637 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:39:50,637 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:39:50,637 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:39:50,637 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:39:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-26 19:39:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:39:50,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:50,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:50,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:50,672 INFO L82 PathProgramCache]: Analyzing trace with hash -181434534, now seen corresponding path program 1 times [2020-10-26 19:39:50,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:50,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368958550] [2020-10-26 19:39:50,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:50,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:51,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:51,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:51,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:51,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:53,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:39:53,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:39:53,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2688 [2020-10-26 19:39:53,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:53,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:39:53,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:53,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:39:53,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:39:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:53,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:53,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:53,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:39:53,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:53,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:53,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:53,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:53,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:53,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:53,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:53,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:53,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:39:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:39:53,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:53,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368958550] [2020-10-26 19:39:53,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:39:53,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:39:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217831050] [2020-10-26 19:39:53,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:39:53,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:53,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:39:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:39:53,710 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 5 states. [2020-10-26 19:39:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:53,952 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2020-10-26 19:39:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:39:53,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-26 19:39:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:53,962 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:39:53,962 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:39:53,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:39:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:39:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-26 19:39:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:39:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-26 19:39:54,011 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2020-10-26 19:39:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:54,012 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-26 19:39:54,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:39:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-26 19:39:54,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:39:54,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:54,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:54,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:39:54,014 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash -697842092, now seen corresponding path program 1 times [2020-10-26 19:39:54,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:54,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181794013] [2020-10-26 19:39:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:59,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:59,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:39:59,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:39:59,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:39:59,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:39:59,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:59,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:39:59,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:59,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:59,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:59,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:59,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:59,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:59,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:39:59,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:59,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:59,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:59,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:59,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:59,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:59,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:59,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:59,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:59,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:59,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:59,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:59,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:59,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181794013] [2020-10-26 19:39:59,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:59,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:39:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733846952] [2020-10-26 19:39:59,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:39:59,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:39:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:39:59,775 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 17 states. [2020-10-26 19:40:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:01,623 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-26 19:40:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:40:01,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-26 19:40:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:01,629 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:40:01,630 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:40:01,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:40:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:40:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-10-26 19:40:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:40:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-26 19:40:01,650 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2020-10-26 19:40:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:01,650 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-26 19:40:01,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:40:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-26 19:40:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:40:01,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:01,652 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:01,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:40:01,653 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash 583184370, now seen corresponding path program 2 times [2020-10-26 19:40:01,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:01,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398012054] [2020-10-26 19:40:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:01,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:04,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:40:04,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:40:04,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2470 [2020-10-26 19:40:04,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:04,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:40:04,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:04,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:40:04,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:04,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:04,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:04,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:04,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:04,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:04,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:04,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:04,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:04,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:04,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:04,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:04,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:04,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:04,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:04,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398012054] [2020-10-26 19:40:04,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:04,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:40:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413977154] [2020-10-26 19:40:04,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:40:04,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:04,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:40:04,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:40:04,263 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 8 states. [2020-10-26 19:40:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:04,600 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-10-26 19:40:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:40:04,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-26 19:40:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:04,601 INFO L225 Difference]: With dead ends: 91 [2020-10-26 19:40:04,602 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:40:04,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:40:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:40:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-26 19:40:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:40:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-26 19:40:04,624 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2020-10-26 19:40:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:04,625 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-26 19:40:04,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:40:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-26 19:40:04,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:40:04,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:04,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:04,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:40:04,627 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1529483086, now seen corresponding path program 3 times [2020-10-26 19:40:04,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:04,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385810475] [2020-10-26 19:40:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:04,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:07,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:08,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:08,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:09,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:40:09,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:40:09,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:40:09,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:09,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:40:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:40:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:40:10,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:10,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:10,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:10,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:10,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:40:10,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:10,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:10,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:10,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:10,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:10,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:10,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:10,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385810475] [2020-10-26 19:40:10,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:10,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:40:10,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764950844] [2020-10-26 19:40:10,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:40:10,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:40:10,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:40:10,408 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 18 states. [2020-10-26 19:40:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:11,346 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-10-26 19:40:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:40:11,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-26 19:40:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:11,348 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:40:11,348 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:40:11,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:40:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:40:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:40:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:40:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:40:11,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-26 19:40:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:11,359 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:40:11,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:40:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:40:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:40:11,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:11,360 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:11,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:40:11,360 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1643029680, now seen corresponding path program 4 times [2020-10-26 19:40:11,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:11,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479817460] [2020-10-26 19:40:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:16,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:40:16,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:40:16,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:40:16,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:16,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:40:16,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:16,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:40:16,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:16,721 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-26 19:40:18,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:18,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:18,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:18,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:18,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:40:18,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:18,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:18,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:18,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:18,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:18,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:18,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:18,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:18,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:18,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:18,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:18,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:18,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479817460] [2020-10-26 19:40:18,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:18,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:40:18,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477874886] [2020-10-26 19:40:18,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:40:18,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:18,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:40:18,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:40:18,111 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 23 states. [2020-10-26 19:40:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:19,929 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-10-26 19:40:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:40:19,930 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-10-26 19:40:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:19,932 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:40:19,932 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:40:19,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:40:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:40:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-26 19:40:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:40:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-26 19:40:19,947 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 38 [2020-10-26 19:40:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:19,947 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-26 19:40:19,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:40:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-26 19:40:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:40:19,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:19,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:19,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:40:19,953 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:19,954 INFO L82 PathProgramCache]: Analyzing trace with hash 907843182, now seen corresponding path program 5 times [2020-10-26 19:40:19,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:19,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554054539] [2020-10-26 19:40:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:19,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:24,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:40:24,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:40:24,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:40:24,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:24,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:40:24,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:24,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:40:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:25,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:25,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:25,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:40:25,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:25,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:25,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:25,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:25,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:25,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:25,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:25,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:25,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:25,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:25,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554054539] [2020-10-26 19:40:25,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:25,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:40:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401779617] [2020-10-26 19:40:25,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:40:25,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:40:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:40:25,109 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 10 states. [2020-10-26 19:40:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:25,516 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2020-10-26 19:40:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:40:25,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-26 19:40:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:25,519 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:40:25,519 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:40:25,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:40:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:40:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-26 19:40:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:40:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-26 19:40:25,536 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 40 [2020-10-26 19:40:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:25,537 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-26 19:40:25,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:40:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-26 19:40:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:40:25,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:25,538 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:25,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:40:25,538 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:25,539 INFO L82 PathProgramCache]: Analyzing trace with hash -628676946, now seen corresponding path program 6 times [2020-10-26 19:40:25,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:25,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963755901] [2020-10-26 19:40:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:26,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:26,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:30,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:40:30,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:40:30,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:40:30,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:30,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:40:30,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:30,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:40:30,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:30,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:30,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:30,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:30,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:30,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:40:30,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:30,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:30,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:30,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:30,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:30,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:30,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:30,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:30,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:30,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:30,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:30,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:40:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:40:30,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963755901] [2020-10-26 19:40:30,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:30,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:40:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716701274] [2020-10-26 19:40:30,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:40:30,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:40:30,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:40:30,682 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 8 states. [2020-10-26 19:40:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:30,943 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-10-26 19:40:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:40:30,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-26 19:40:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:30,945 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:40:30,945 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:40:30,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:40:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:40:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-26 19:40:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:40:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-26 19:40:30,963 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 40 [2020-10-26 19:40:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:30,963 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-26 19:40:30,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:40:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-26 19:40:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:40:30,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:30,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:30,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:40:30,965 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:30,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1178128052, now seen corresponding path program 7 times [2020-10-26 19:40:30,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:30,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943642811] [2020-10-26 19:40:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:31,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:35,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:36,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:36,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:40:36,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:40:36,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:40:36,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:40:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:40:36,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:37,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:37,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:37,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:37,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:37,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:40:37,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:37,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:37,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:37,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:37,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943642811] [2020-10-26 19:40:37,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:37,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:40:37,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539875530] [2020-10-26 19:40:37,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:40:37,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:37,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:40:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:40:37,537 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 24 states. [2020-10-26 19:40:38,201 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-26 19:40:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:39,680 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-26 19:40:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:40:39,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-10-26 19:40:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:39,682 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:40:39,682 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:40:39,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:40:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:40:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:40:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:40:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:40:39,694 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 42 [2020-10-26 19:40:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:39,694 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:40:39,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:40:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:40:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:40:39,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:39,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:39,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:40:39,696 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash -476120504, now seen corresponding path program 8 times [2020-10-26 19:40:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:39,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060815611] [2020-10-26 19:40:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:39,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:40,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:43,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:43,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:44,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:44,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:44,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:40:44,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:40:44,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:40:44,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:40:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:40:44,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:46,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:46,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:46,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:46,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:46,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:46,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:46,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:46,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:46,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:46,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:46,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:46,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:46,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:46,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:46,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:46,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:46,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:46,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060815611] [2020-10-26 19:40:46,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:46,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:40:46,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936240575] [2020-10-26 19:40:46,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:40:46,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:40:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:40:46,165 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 26 states. [2020-10-26 19:40:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:48,138 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-10-26 19:40:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:40:48,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-10-26 19:40:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:48,141 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:40:48,141 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:40:48,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:40:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:40:48,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-10-26 19:40:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:40:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-26 19:40:48,153 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 46 [2020-10-26 19:40:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:48,154 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-26 19:40:48,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:40:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-26 19:40:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:40:48,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:48,155 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:48,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:40:48,156 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:48,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1469241498, now seen corresponding path program 9 times [2020-10-26 19:40:48,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:48,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032919040] [2020-10-26 19:40:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:48,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:49,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:49,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:53,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:53,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:40:53,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:40:53,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:40:53,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:53,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:40:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:40:53,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:53,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:53,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:53,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:53,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:53,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:53,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:53,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:53,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:53,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:53,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:53,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 19:40:53,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032919040] [2020-10-26 19:40:53,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:53,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:40:53,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595482377] [2020-10-26 19:40:53,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:40:53,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:40:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:40:53,294 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 10 states. [2020-10-26 19:40:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:53,667 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-26 19:40:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:40:53,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-26 19:40:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:53,669 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:40:53,669 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:40:53,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:40:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:40:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2020-10-26 19:40:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:40:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-26 19:40:53,680 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 48 [2020-10-26 19:40:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:53,680 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-26 19:40:53,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:40:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-26 19:40:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:40:53,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:53,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:53,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:40:53,682 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash -460749756, now seen corresponding path program 10 times [2020-10-26 19:40:53,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:53,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400773638] [2020-10-26 19:40:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:53,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:54,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:54,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:55,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:55,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:56,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:57,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:57,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:58,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:58,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:58,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:40:58,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:40:58,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:40:58,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:40:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:40:58,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:01,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:01,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:01,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:01,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:01,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:01,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:01,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:01,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:01,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:01,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:01,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:01,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400773638] [2020-10-26 19:41:01,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:01,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:41:01,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376212900] [2020-10-26 19:41:01,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:41:01,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:41:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:41:01,320 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 35 states. [2020-10-26 19:41:02,107 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-26 19:41:02,435 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-26 19:41:03,043 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-26 19:41:04,594 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-26 19:41:04,806 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-26 19:41:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:05,899 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-26 19:41:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:41:05,900 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2020-10-26 19:41:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:05,902 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:41:05,902 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:41:05,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=455, Invalid=3577, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:41:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:41:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-26 19:41:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:41:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-26 19:41:05,916 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 50 [2020-10-26 19:41:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:05,916 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-26 19:41:05,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:41:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-26 19:41:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:41:05,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:05,918 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:05,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:41:05,918 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash 795652578, now seen corresponding path program 11 times [2020-10-26 19:41:05,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553954006] [2020-10-26 19:41:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:05,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:06,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:10,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:10,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:41:10,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:41:10,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:41:10,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:41:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:41:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:11,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:11,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:11,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:11,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:11,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:11,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:11,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:11,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:11,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:11,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:11,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:11,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:41:11,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553954006] [2020-10-26 19:41:11,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:11,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:41:11,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580890215] [2020-10-26 19:41:11,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:41:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:11,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:41:11,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:41:11,123 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 12 states. [2020-10-26 19:41:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:11,614 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-10-26 19:41:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:41:11,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-26 19:41:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:11,616 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:41:11,616 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:41:11,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:41:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:41:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-26 19:41:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:41:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-26 19:41:11,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 52 [2020-10-26 19:41:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:11,628 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-26 19:41:11,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:41:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-26 19:41:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:41:11,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:11,629 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:11,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:41:11,630 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:11,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash -710442688, now seen corresponding path program 12 times [2020-10-26 19:41:11,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:11,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362120651] [2020-10-26 19:41:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:11,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:11,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:11,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:13,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:16,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:16,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:41:16,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:41:16,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5208 [2020-10-26 19:41:16,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:16,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:41:16,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:41:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:17,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:17,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:17,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:17,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:17,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:41:17,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:17,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:17,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:17,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:17,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:17,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:17,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:41:17,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362120651] [2020-10-26 19:41:17,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:17,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:41:17,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551656109] [2020-10-26 19:41:17,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:41:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:41:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:41:17,048 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 12 states. [2020-10-26 19:41:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:17,630 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-26 19:41:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:41:17,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-26 19:41:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:17,632 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:41:17,632 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:41:17,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:41:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:41:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-26 19:41:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:41:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-26 19:41:17,642 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 54 [2020-10-26 19:41:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:17,644 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-26 19:41:17,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:41:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-26 19:41:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:41:17,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:17,646 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:17,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:41:17,646 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash 76988220, now seen corresponding path program 13 times [2020-10-26 19:41:17,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:17,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737088065] [2020-10-26 19:41:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:17,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:18,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:19,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:20,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:21,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:22,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:22,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:22,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:41:22,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:41:22,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:41:22,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:41:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:41:22,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:23,292 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-26 19:41:23,440 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-26 19:41:23,761 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-26 19:41:23,907 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-26 19:41:24,117 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-26 19:41:24,436 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-26 19:41:25,322 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:41:25,507 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-26 19:41:25,700 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-26 19:41:25,934 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-26 19:41:26,178 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-26 19:41:26,411 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-26 19:41:26,602 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 19:41:26,849 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-26 19:41:27,049 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-26 19:41:27,241 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-26 19:41:28,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:28,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:28,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:28,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:28,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:28,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:28,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:28,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:28,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:28,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:28,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:28,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:28,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:28,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:28,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:28,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:28,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:28,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:28,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737088065] [2020-10-26 19:41:28,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:28,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:41:28,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765451961] [2020-10-26 19:41:28,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:41:28,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:28,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:41:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:41:28,297 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 42 states. [2020-10-26 19:41:28,812 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:41:29,512 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-26 19:41:29,855 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-10-26 19:41:30,181 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-26 19:41:30,377 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-26 19:41:30,594 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:41:31,397 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 106 [2020-10-26 19:41:31,654 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2020-10-26 19:41:31,975 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-26 19:41:32,236 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-26 19:41:32,597 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2020-10-26 19:41:33,016 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2020-10-26 19:41:33,416 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-10-26 19:41:33,734 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-26 19:41:34,095 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-26 19:41:35,323 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-26 19:41:35,727 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-26 19:41:36,093 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-10-26 19:41:36,905 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-26 19:41:37,209 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-26 19:41:37,486 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-26 19:41:37,679 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-26 19:41:37,892 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-26 19:41:38,154 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-26 19:41:38,366 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-26 19:41:38,729 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-26 19:41:39,143 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-26 19:41:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:39,524 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-26 19:41:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:41:39,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2020-10-26 19:41:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:39,526 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:41:39,526 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:41:39,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=929, Invalid=5713, Unknown=0, NotChecked=0, Total=6642 [2020-10-26 19:41:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:41:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-10-26 19:41:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:41:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-26 19:41:39,539 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 58 [2020-10-26 19:41:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:39,540 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-26 19:41:39,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:41:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-26 19:41:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:41:39,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:39,541 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:39,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:41:39,541 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash 802406170, now seen corresponding path program 14 times [2020-10-26 19:41:39,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:39,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63191905] [2020-10-26 19:41:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:39,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:44,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:44,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:41:44,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:41:44,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:41:44,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:41:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:41:44,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:44,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:44,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:44,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:44,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:44,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:44,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:44,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:44,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:44,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:44,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:44,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:41:44,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63191905] [2020-10-26 19:41:44,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:44,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:41:44,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720867969] [2020-10-26 19:41:44,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:41:44,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:44,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:41:44,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:41:44,746 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 14 states. [2020-10-26 19:41:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:45,297 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-10-26 19:41:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:41:45,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-26 19:41:45,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:45,299 INFO L225 Difference]: With dead ends: 137 [2020-10-26 19:41:45,300 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:41:45,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:41:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:41:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-10-26 19:41:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:41:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-26 19:41:45,311 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 60 [2020-10-26 19:41:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:45,311 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-26 19:41:45,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:41:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-26 19:41:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:41:45,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:45,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:45,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:41:45,313 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -250417096, now seen corresponding path program 15 times [2020-10-26 19:41:45,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:45,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385566388] [2020-10-26 19:41:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:45,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:45,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:46,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:50,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:50,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:41:50,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:41:50,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:41:50,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:41:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:50,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:41:50,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:50,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:50,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:50,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:50,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:50,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:50,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:50,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:50,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:50,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:50,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:50,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:50,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:50,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-26 19:41:50,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385566388] [2020-10-26 19:41:50,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:50,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:41:50,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981473661] [2020-10-26 19:41:50,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:41:50,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:41:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:41:50,527 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 14 states. [2020-10-26 19:41:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:51,263 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-26 19:41:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:41:51,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-26 19:41:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:51,265 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:41:51,265 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:41:51,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:41:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:41:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-26 19:41:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:41:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-26 19:41:51,276 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 62 [2020-10-26 19:41:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:51,277 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-26 19:41:51,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:41:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-26 19:41:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:41:51,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:51,278 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:51,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:41:51,278 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:51,279 INFO L82 PathProgramCache]: Analyzing trace with hash -774446540, now seen corresponding path program 16 times [2020-10-26 19:41:51,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:51,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664567366] [2020-10-26 19:41:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:51,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:51,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:56,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:41:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:57,512 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-26 19:41:57,796 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-26 19:41:58,091 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-26 19:41:58,390 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-26 19:42:00,333 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-26 19:42:00,544 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-26 19:42:00,757 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-26 19:42:01,156 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-26 19:42:01,525 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-26 19:42:02,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:02,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:02,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:02,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:02,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:02,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:02,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664567366] [2020-10-26 19:42:02,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:02,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:42:02,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814918635] [2020-10-26 19:42:02,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:42:02,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:42:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:42:02,281 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 46 states. [2020-10-26 19:42:03,835 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-26 19:42:06,694 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-26 19:42:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:08,212 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-26 19:42:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:42:08,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2020-10-26 19:42:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:08,214 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:42:08,214 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:42:08,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=468, Invalid=6012, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:42:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:42:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2020-10-26 19:42:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:42:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-26 19:42:08,229 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 66 [2020-10-26 19:42:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:08,229 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-26 19:42:08,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:42:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-26 19:42:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:42:08,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:08,230 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:08,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:42:08,231 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash -19246126, now seen corresponding path program 17 times [2020-10-26 19:42:08,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:08,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059246668] [2020-10-26 19:42:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:08,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:13,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:13,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:42:13,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:42:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:42:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:42:13,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:13,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:13,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:13,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:13,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:13,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-26 19:42:13,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059246668] [2020-10-26 19:42:13,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:13,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:42:13,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278399991] [2020-10-26 19:42:13,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:42:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:42:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:42:13,492 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 16 states. [2020-10-26 19:42:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:14,215 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2020-10-26 19:42:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:42:14,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-26 19:42:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:14,217 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:42:14,217 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:42:14,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:42:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:42:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2020-10-26 19:42:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:42:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-26 19:42:14,231 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 68 [2020-10-26 19:42:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:14,231 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-26 19:42:14,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:42:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-26 19:42:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:42:14,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:14,232 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:14,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:42:14,232 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2093565744, now seen corresponding path program 18 times [2020-10-26 19:42:14,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:14,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80722275] [2020-10-26 19:42:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:14,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:14,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:19,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:19,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:42:19,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:42:19,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:42:19,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:19,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:42:19,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:19,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:42:19,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:19,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:19,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:19,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:19,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:19,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:19,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:19,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:19,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:19,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:19,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:19,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:19,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:19,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:19,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:42:19,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-26 19:42:19,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80722275] [2020-10-26 19:42:19,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:19,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:42:19,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233265922] [2020-10-26 19:42:19,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:42:19,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:19,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:42:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:42:19,483 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 16 states. [2020-10-26 19:42:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:20,379 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-10-26 19:42:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:42:20,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-26 19:42:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:20,381 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:42:20,381 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:42:20,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:42:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:42:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-26 19:42:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:42:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-26 19:42:20,391 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2020-10-26 19:42:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:20,391 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-26 19:42:20,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:42:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-26 19:42:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:42:20,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:20,392 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:20,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:42:20,392 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:20,392 INFO L82 PathProgramCache]: Analyzing trace with hash 238153004, now seen corresponding path program 19 times [2020-10-26 19:42:20,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:20,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398960881] [2020-10-26 19:42:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:20,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:21,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:24,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:25,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:42:25,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:26,448 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:42:26,772 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-26 19:42:26,943 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-26 19:42:27,163 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-26 19:42:27,338 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-26 19:42:27,573 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-26 19:42:27,738 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:42:27,958 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-26 19:42:28,133 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-26 19:42:28,322 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-26 19:42:28,666 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-26 19:42:29,691 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-26 19:42:29,926 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2020-10-26 19:42:30,171 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-26 19:42:30,423 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2020-10-26 19:42:30,729 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-26 19:42:31,024 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2020-10-26 19:42:31,354 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-26 19:42:31,665 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-26 19:42:31,969 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-26 19:42:32,437 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-26 19:42:33,387 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-26 19:42:35,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:35,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:35,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:35,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:35,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398960881] [2020-10-26 19:42:35,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:35,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-26 19:42:35,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524233767] [2020-10-26 19:42:35,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-26 19:42:35,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-26 19:42:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:42:35,375 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 58 states. [2020-10-26 19:42:37,415 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-26 19:42:37,690 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-26 19:42:37,980 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-26 19:42:38,385 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 55 [2020-10-26 19:42:38,703 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-26 19:42:39,009 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-26 19:42:39,338 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-26 19:42:39,616 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-26 19:42:39,896 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-26 19:42:41,767 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:42:42,022 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-26 19:42:42,336 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-26 19:42:42,593 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-26 19:42:42,886 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-26 19:42:43,182 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-26 19:42:43,466 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-26 19:42:43,763 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-26 19:42:44,063 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-26 19:42:44,363 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-26 19:42:44,785 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2020-10-26 19:42:45,080 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-10-26 19:42:45,505 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-26 19:42:45,750 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-26 19:42:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:47,038 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-10-26 19:42:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-26 19:42:47,039 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 74 [2020-10-26 19:42:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:47,040 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:42:47,041 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:42:47,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=679, Invalid=9623, Unknown=0, NotChecked=0, Total=10302 [2020-10-26 19:42:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:42:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-10-26 19:42:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:42:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:42:47,057 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 74 [2020-10-26 19:42:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:47,057 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:42:47,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-26 19:42:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:42:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:42:47,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:47,058 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:47,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:42:47,059 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:47,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1868660534, now seen corresponding path program 20 times [2020-10-26 19:42:47,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:47,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867201215] [2020-10-26 19:42:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:47,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:52,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:52,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:42:52,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:42:52,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:42:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:42:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:52,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:52,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:52,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:52,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:52,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:52,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:52,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:52,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:52,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:52,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:52,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:52,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:52,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:52,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:52,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:52,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 19:42:52,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867201215] [2020-10-26 19:42:52,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:52,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:42:52,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489728130] [2020-10-26 19:42:52,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:42:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:42:52,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:42:52,376 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 18 states. [2020-10-26 19:42:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:53,192 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-10-26 19:42:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:42:53,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-26 19:42:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:53,195 INFO L225 Difference]: With dead ends: 187 [2020-10-26 19:42:53,195 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:42:53,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:42:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:42:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-26 19:42:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:42:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-26 19:42:53,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 76 [2020-10-26 19:42:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:53,209 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-26 19:42:53,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:42:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-26 19:42:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:42:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:53,210 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:53,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:42:53,210 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1984788952, now seen corresponding path program 21 times [2020-10-26 19:42:53,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:53,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290081500] [2020-10-26 19:42:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:58,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:42:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:58,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:58,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:58,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:58,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:58,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:58,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:58,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:58,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:58,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:58,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:58,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:58,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:58,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:58,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:58,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:58,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 19:42:58,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290081500] [2020-10-26 19:42:58,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:58,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:42:58,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095985787] [2020-10-26 19:42:58,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:42:58,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:42:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:42:58,576 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 18 states. [2020-10-26 19:42:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:59,788 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-10-26 19:42:59,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:42:59,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-10-26 19:42:59,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:59,793 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:42:59,793 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:42:59,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:42:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:42:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-26 19:42:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:42:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-26 19:42:59,806 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 78 [2020-10-26 19:42:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:59,806 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-26 19:42:59,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:42:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-26 19:42:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:42:59,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:59,807 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:59,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:42:59,807 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:59,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:59,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2054168540, now seen corresponding path program 22 times [2020-10-26 19:42:59,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:59,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770417737] [2020-10-26 19:42:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:01,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:43:04,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:05,872 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-26 19:43:06,136 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-26 19:43:06,423 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-26 19:43:06,576 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-26 19:43:06,757 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:43:07,070 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-26 19:43:07,236 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-26 19:43:07,397 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-26 19:43:07,913 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-26 19:43:08,233 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-26 19:43:08,550 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-26 19:43:08,728 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-26 19:43:08,897 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-26 19:43:09,425 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-26 19:43:09,633 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-26 19:43:09,873 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-10-26 19:43:10,109 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-10-26 19:43:10,397 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2020-10-26 19:43:10,670 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-10-26 19:43:10,968 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2020-10-26 19:43:11,270 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2020-10-26 19:43:11,573 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-10-26 19:43:11,880 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2020-10-26 19:43:12,238 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-26 19:43:12,566 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-26 19:43:12,848 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-26 19:43:13,121 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-26 19:43:13,390 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:43:13,653 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-26 19:43:13,998 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-26 19:43:14,274 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-26 19:43:14,588 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-26 19:43:17,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:17,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:17,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:17,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:17,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:17,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:17,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:17,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:17,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:17,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:17,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:17,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:17,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:43:17,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:17,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:17,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:43:17,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770417737] [2020-10-26 19:43:17,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:17,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-26 19:43:17,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748248095] [2020-10-26 19:43:17,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-26 19:43:17,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-26 19:43:17,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=3758, Unknown=0, NotChecked=0, Total=4160 [2020-10-26 19:43:17,481 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 65 states. [2020-10-26 19:43:19,936 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-26 19:43:20,512 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-26 19:43:21,163 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-10-26 19:43:21,965 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 115 [2020-10-26 19:43:22,663 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-26 19:43:23,723 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-26 19:43:24,130 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-26 19:43:24,387 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-26 19:43:24,643 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 19:43:24,874 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-26 19:43:26,155 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2020-10-26 19:43:26,387 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-26 19:43:26,748 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-26 19:43:27,327 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-26 19:43:27,939 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-26 19:43:28,571 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-26 19:43:28,864 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-26 19:43:29,268 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-26 19:43:29,582 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-26 19:43:30,029 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-26 19:43:30,365 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-26 19:43:30,947 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-26 19:43:31,653 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 81 [2020-10-26 19:43:32,027 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-26 19:43:32,637 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-10-26 19:43:33,198 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-26 19:43:33,645 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-26 19:43:33,947 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-26 19:43:34,237 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66