/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/sina1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:42:22,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:42:22,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:42:22,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:42:22,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:42:22,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:42:22,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:42:22,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:42:22,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:42:22,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:42:22,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:42:22,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:42:22,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:42:22,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:42:22,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:42:22,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:42:22,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:42:22,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:42:22,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:42:22,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:42:22,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:42:22,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:42:22,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:42:22,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:42:22,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:42:22,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:42:22,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:42:22,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:42:22,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:42:22,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:42:22,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:42:22,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:42:22,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:42:22,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:42:22,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:42:22,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:42:22,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:42:22,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:42:22,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:42:22,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:42:22,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:42:22,215 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 19:42:22,264 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:42:22,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:42:22,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:42:22,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:42:22,269 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:42:22,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:42:22,270 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:42:22,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:42:22,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:42:22,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:42:22,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:42:22,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:42:22,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:42:22,272 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:42:22,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:42:22,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:42:22,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:42:22,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:42:22,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:42:22,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:42:22,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:42:22,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:42:22,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:42:22,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:42:22,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:42:22,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:42:22,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:42:22,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:42:22,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:42:22,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:42:22,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:42:22,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:42:22,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:42:22,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:42:22,770 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:42:22,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina1.c [2020-10-26 19:42:22,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4bfc94dc/a2cef9f5229643a9b1abb426818a5d44/FLAG7a051546e [2020-10-26 19:42:23,452 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:42:23,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina1.c [2020-10-26 19:42:23,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4bfc94dc/a2cef9f5229643a9b1abb426818a5d44/FLAG7a051546e [2020-10-26 19:42:23,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4bfc94dc/a2cef9f5229643a9b1abb426818a5d44 [2020-10-26 19:42:23,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:42:23,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:42:23,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:42:23,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:42:23,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:42:23,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:42:23" (1/1) ... [2020-10-26 19:42:23,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3021ffb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:23, skipping insertion in model container [2020-10-26 19:42:23,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:42:23" (1/1) ... [2020-10-26 19:42:23,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:42:23,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:42:24,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:42:24,031 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:42:24,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:42:24,069 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:42:24,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24 WrapperNode [2020-10-26 19:42:24,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:42:24,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:42:24,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:42:24,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:42:24,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (1/1) ... [2020-10-26 19:42:24,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (1/1) ... [2020-10-26 19:42:24,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (1/1) ... [2020-10-26 19:42:24,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (1/1) ... [2020-10-26 19:42:24,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (1/1) ... [2020-10-26 19:42:24,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (1/1) ... [2020-10-26 19:42:24,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (1/1) ... [2020-10-26 19:42:24,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:42:24,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:42:24,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:42:24,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:42:24,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (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 19:42:24,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:42:24,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:42:24,219 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:42:24,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:42:24,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:42:24,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:42:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:42:24,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:42:24,222 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:42:24,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:42:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:42:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:42:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:42:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:42:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:42:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:42:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:42:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:42:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:42:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:42:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:42:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:42:24,832 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:42:24,832 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:42:24,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:42:24 BoogieIcfgContainer [2020-10-26 19:42:24,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:42:24,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:42:24,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:42:24,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:42:24,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:42:23" (1/3) ... [2020-10-26 19:42:24,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f81fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:42:24, skipping insertion in model container [2020-10-26 19:42:24,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:42:24" (2/3) ... [2020-10-26 19:42:24,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f81fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:42:24, skipping insertion in model container [2020-10-26 19:42:24,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:42:24" (3/3) ... [2020-10-26 19:42:24,854 INFO L111 eAbstractionObserver]: Analyzing ICFG sina1.c [2020-10-26 19:42:24,880 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:42:24,887 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:42:24,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:42:24,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:42:24,936 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:42:24,936 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:42:24,936 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:42:24,936 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:42:24,937 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:42:24,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:42:24,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:42:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:42:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:42:24,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:24,962 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] [2020-10-26 19:42:24,963 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:24,970 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-10-26 19:42:24,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:24,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400160681] [2020-10-26 19:42:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:25,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:25,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:25,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:25,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:26,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:42:26,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:42:26,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-26 19:42:26,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:26,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:42:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:42:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:42:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:42:26,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:26,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:26,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:26,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:26,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:42:26,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:26,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:26,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:26,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:26,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:42:26,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:26,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:26,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:26,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:26,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:42:26,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:42:26,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:26,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:42:26,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:26,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:42:26,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:26,540 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 19:42:26,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400160681] [2020-10-26 19:42:26,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:42:26,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:42:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851228802] [2020-10-26 19:42:26,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:42:26,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:26,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:42:26,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:42:26,569 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-26 19:42:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:26,903 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2020-10-26 19:42:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:42:26,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:42:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:26,914 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:42:26,915 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:42:26,918 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 19:42:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:42:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-26 19:42:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:42:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-26 19:42:26,966 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-26 19:42:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:26,967 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-26 19:42:26,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:42:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-26 19:42:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:42:26,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:26,969 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] [2020-10-26 19:42:26,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:42:26,969 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-10-26 19:42:26,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:26,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370394673] [2020-10-26 19:42:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:27,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:27,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:42:28,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1207 [2020-10-26 19:42:28,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:42:28,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:28,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:42:28,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:28,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:28,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:28,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:28,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:28,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:28,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:28,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:28,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:28,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:28,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:28,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:28,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:28,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:28,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:28,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:28,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370394673] [2020-10-26 19:42:28,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:28,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:42:28,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697519589] [2020-10-26 19:42:28,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:42:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:42:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:42:28,865 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2020-10-26 19:42:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:29,953 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-26 19:42:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:42:29,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-26 19:42:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:29,957 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:42:29,958 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:42:29,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:42:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:42:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2020-10-26 19:42:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:42:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:42:29,977 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 27 [2020-10-26 19:42:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:29,977 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:42:29,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:42:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:42:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:42:29,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:29,979 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] [2020-10-26 19:42:29,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:42:29,980 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1186077363, now seen corresponding path program 2 times [2020-10-26 19:42:29,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:29,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847777753] [2020-10-26 19:42:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:30,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:30,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:31,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:31,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:42:31,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:31,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-26 19:42:31,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:31,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:42:31,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:42:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:31,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:31,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:31,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:31,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:31,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:31,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:31,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:31,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:31,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:31,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:31,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:31,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:31,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:31,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:31,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:31,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:31,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:31,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:31,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:31,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:31,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:31,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847777753] [2020-10-26 19:42:31,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:31,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:42:31,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816717012] [2020-10-26 19:42:31,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:42:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:42:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:42:31,907 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2020-10-26 19:42:32,791 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-26 19:42:33,001 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-26 19:42:33,188 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-10-26 19:42:33,750 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-10-26 19:42:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:33,911 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-26 19:42:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:42:33,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-26 19:42:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:33,916 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:42:33,916 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:42:33,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:42:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:42:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-26 19:42:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:42:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 19:42:33,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-26 19:42:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:33,933 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 19:42:33,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:42:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 19:42:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:42:33,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:33,937 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] [2020-10-26 19:42:33,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:42:33,938 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:33,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1995705613, now seen corresponding path program 3 times [2020-10-26 19:42:33,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:33,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698081328] [2020-10-26 19:42:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:33,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:34,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:34,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:42:34,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:42:34,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-26 19:42:34,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:34,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:42:34,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:34,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:42:34,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:35,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:35,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:35,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:35,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:35,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:35,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:35,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:35,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:35,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:35,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:35,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:35,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:35,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:42:35,314 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 19:42:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:35,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698081328] [2020-10-26 19:42:35,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:35,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:42:35,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862985741] [2020-10-26 19:42:35,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:42:35,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:35,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:42:35,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:42:35,325 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2020-10-26 19:42:35,877 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-26 19:42:36,410 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-26 19:42:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:36,874 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-26 19:42:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:42:36,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-26 19:42:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:36,878 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:42:36,878 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:42:36,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:42:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:42:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-26 19:42:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:42:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-26 19:42:36,889 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 29 [2020-10-26 19:42:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:36,889 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-26 19:42:36,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:42:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-26 19:42:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:42:36,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:36,890 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:36,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:42:36,891 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:36,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1953964425, now seen corresponding path program 1 times [2020-10-26 19:42:36,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:36,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601789572] [2020-10-26 19:42:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:36,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:37,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:42:38,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:42:38,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-26 19:42:38,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:42:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:42:38,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:38,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:38,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:38,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:38,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:38,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:38,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:38,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-26 19:42:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:38,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:38,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:38,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:38,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:42:38,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:42:38,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:42:38,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:42:38,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:38,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601789572] [2020-10-26 19:42:38,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:38,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:42:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499686048] [2020-10-26 19:42:38,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:42:38,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:42:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:42:38,842 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2020-10-26 19:42:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:39,849 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-26 19:42:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:42:39,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-26 19:42:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:39,854 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:42:39,854 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:42:39,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:42:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:42:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-26 19:42:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:42:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-26 19:42:39,866 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 37 [2020-10-26 19:42:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:39,866 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-26 19:42:39,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:42:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-26 19:42:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:42:39,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:39,868 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:42:39,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:42:39,868 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash 670284825, now seen corresponding path program 2 times [2020-10-26 19:42:39,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:39,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259021432] [2020-10-26 19:42:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:39,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:40,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:40,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:42,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:43,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:44,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:44,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:42:44,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:42:44,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:42:44,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:42:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:42:44,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:45,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:45,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:45,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:45,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:45,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:45,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:45,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:45,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:45,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:45,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:45,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:45,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:45,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:45,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:45,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:45,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:42:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:45,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:45,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:45,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:45,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:45,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:42:45,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:42:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:42:45,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:45,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259021432] [2020-10-26 19:42:45,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:45,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:42:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822500081] [2020-10-26 19:42:45,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:42:45,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:42:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:42:45,606 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 17 states. [2020-10-26 19:42:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:48,170 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-10-26 19:42:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:42:48,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-26 19:42:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:48,173 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:42:48,173 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:42:48,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:42:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:42:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 58. [2020-10-26 19:42:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:42:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-26 19:42:48,192 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 39 [2020-10-26 19:42:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:48,193 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-26 19:42:48,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:42:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-26 19:42:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:42:48,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:48,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:42:48,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:42:48,196 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1428011323, now seen corresponding path program 3 times [2020-10-26 19:42:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:48,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558668415] [2020-10-26 19:42:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:48,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:49,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:53,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:53,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:42:53,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:42:53,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:42:53,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:42:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:42:53,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:54,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:54,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:54,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:54,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:54,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:54,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:42:54,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:54,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:54,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:54,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:54,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:54,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:54,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:54,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:54,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:54,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:54,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:54,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:54,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:54,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:42:54,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:42:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:54,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:54,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:54,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:54,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:42:54,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:42:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:42:54,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:42:54,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558668415] [2020-10-26 19:42:54,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:54,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:42:54,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865248280] [2020-10-26 19:42:54,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:42:54,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:54,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:42:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:42:54,618 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 21 states. [2020-10-26 19:42:55,709 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-26 19:42:56,010 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-26 19:42:56,288 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-26 19:42:56,608 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-26 19:42:56,967 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-26 19:42:57,324 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-26 19:42:57,667 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-26 19:42:58,218 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2020-10-26 19:42:58,505 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2020-10-26 19:42:58,730 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-26 19:42:58,976 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-26 19:42:59,256 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-26 19:42:59,638 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-10-26 19:42:59,898 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-26 19:43:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:00,037 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2020-10-26 19:43:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:43:00,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-26 19:43:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:00,040 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:43:00,040 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:43:00,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=327, Invalid=1743, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:43:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:43:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-26 19:43:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:43:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:43:00,055 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 41 [2020-10-26 19:43:00,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:00,056 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:43:00,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:43:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:43:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:43:00,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:00,057 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:43:00,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:43:00,058 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:00,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1040527611, now seen corresponding path program 4 times [2020-10-26 19:43:00,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:00,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141422373] [2020-10-26 19:43:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:00,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:00,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:00,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:01,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:03,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:03,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:43:03,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:43:03,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3754 [2020-10-26 19:43:03,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:03,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:43:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:43:03,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:04,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:04,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:04,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:04,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:04,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:43:04,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:04,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:04,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:04,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:04,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:04,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:04,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:04,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:04,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:04,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:04,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:04,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:43:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:04,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:04,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:04,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:04,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:04,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:04,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:04,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:04,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:04,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:04,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:43:04,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141422373] [2020-10-26 19:43:04,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:04,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:43:04,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992613435] [2020-10-26 19:43:04,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:43:04,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:43:04,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:43:04,852 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 20 states. [2020-10-26 19:43:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:07,076 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-10-26 19:43:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:43:07,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-26 19:43:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:07,080 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:43:07,080 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:43:07,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:43:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:43:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-10-26 19:43:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:43:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-26 19:43:07,092 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2020-10-26 19:43:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:07,093 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-26 19:43:07,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:43:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-26 19:43:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:43:07,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:07,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-26 19:43:07,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:43:07,094 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:07,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1703057085, now seen corresponding path program 5 times [2020-10-26 19:43:07,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:07,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821163095] [2020-10-26 19:43:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:09,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:09,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:09,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:43:09,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:43:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2774 [2020-10-26 19:43:09,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:43:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:43:09,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:10,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:10,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:10,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:10,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:10,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:10,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:10,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:10,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:10,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:10,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:10,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:10,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:10,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:10,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:10,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:10,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:10,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:43:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:10,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:10,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:10,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:10,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:10,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:10,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:43:10,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:10,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:10,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:43:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:10,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:10,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:10,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:10,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:43:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:10,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:43:10,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821163095] [2020-10-26 19:43:10,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:10,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:43:10,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463676586] [2020-10-26 19:43:10,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:43:10,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:43:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:43:10,052 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 8 states. [2020-10-26 19:43:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:10,511 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-26 19:43:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:43:10,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-26 19:43:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:10,512 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:43:10,513 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:43:10,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:43:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:43:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-26 19:43:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:43:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-26 19:43:10,524 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2020-10-26 19:43:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:10,524 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-26 19:43:10,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:43:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-26 19:43:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:43:10,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:10,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:10,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:43:10,526 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash -463063963, now seen corresponding path program 6 times [2020-10-26 19:43:10,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:10,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42693386] [2020-10-26 19:43:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:10,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:14,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:14,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:15,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:15,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:43:15,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:43:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:43:15,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:43:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:43:15,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:16,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:16,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:16,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:16,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:16,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:16,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:16,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:16,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:16,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:16,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:16,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:16,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:16,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:16,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:43:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:16,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:16,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:16,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:16,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:16,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:43:16,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:16,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:16,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:16,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:16,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:43:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:16,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:16,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:16,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:16,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:16,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:43:16,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:43:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:43:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:43:16,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42693386] [2020-10-26 19:43:16,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:16,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:43:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748554858] [2020-10-26 19:43:16,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:43:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:43:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:43:16,986 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 23 states. [2020-10-26 19:43:17,557 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-26 19:43:17,908 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-10-26 19:43:18,243 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-26 19:43:18,440 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-26 19:43:18,759 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-26 19:43:18,956 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-26 19:43:19,120 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-10-26 19:43:19,305 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-26 19:43:19,657 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-26 19:43:20,200 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-10-26 19:43:20,530 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-10-26 19:43:20,793 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-26 19:43:20,975 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-26 19:43:21,242 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-26 19:43:21,480 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-26 19:43:21,777 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-26 19:43:22,070 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-26 19:43:22,387 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-26 19:43:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:22,652 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-10-26 19:43:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:43:22,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-10-26 19:43:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:22,655 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:43:22,655 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:43:22,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=374, Invalid=1978, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:43:22,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:43:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-26 19:43:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:43:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-26 19:43:22,669 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2020-10-26 19:43:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:22,669 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-26 19:43:22,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:43:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-26 19:43:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:43:22,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:22,671 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:22,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:43:22,671 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1813804743, now seen corresponding path program 7 times [2020-10-26 19:43:22,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:22,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883913496] [2020-10-26 19:43:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:23,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:27,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:27,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:43:27,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:43:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:43:27,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:43:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:43:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:28,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:28,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:28,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:28,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:28,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:28,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:28,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:28,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:28,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:28,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:28,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:28,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:28,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:28,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:28,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:28,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:28,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:43:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:28,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:28,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:28,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:28,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:43:28,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:43:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:43:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:28,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:28,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:43:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:28,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:28,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:28,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:28,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:28,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:28,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:28,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:28,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:43:28,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:28,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:43:28,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883913496] [2020-10-26 19:43:28,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:28,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:43:28,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766629632] [2020-10-26 19:43:28,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:43:28,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:28,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:43:28,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:43:28,643 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 18 states. [2020-10-26 19:43:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:29,883 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-26 19:43:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:43:29,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-26 19:43:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:29,886 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:43:29,886 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:43:29,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:43:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:43:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-10-26 19:43:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:43:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-26 19:43:29,899 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2020-10-26 19:43:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:29,899 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-26 19:43:29,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:43:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-26 19:43:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:43:29,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:29,900 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-26 19:43:29,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:43:29,901 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:29,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:29,901 INFO L82 PathProgramCache]: Analyzing trace with hash -898109207, now seen corresponding path program 8 times [2020-10-26 19:43:29,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:29,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867144919] [2020-10-26 19:43:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:29,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:32,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:33,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:34,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:34,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:43:34,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:43:34,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:43:34,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:34,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:43:34,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:34,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:43:34,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:36,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:36,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:36,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:36,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:36,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:36,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:36,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:36,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:36,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:36,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:36,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:36,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:36,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:43:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:36,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:36,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:43:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:43:36,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867144919] [2020-10-26 19:43:36,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:36,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:43:36,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192586397] [2020-10-26 19:43:36,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:43:36,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:43:36,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:43:36,537 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 23 states. [2020-10-26 19:43:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:38,691 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-26 19:43:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:43:38,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-26 19:43:38,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:38,694 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:43:38,694 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:43:38,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:43:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:43:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-10-26 19:43:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:43:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-26 19:43:38,712 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 53 [2020-10-26 19:43:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:38,712 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-26 19:43:38,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:43:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-26 19:43:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:43:38,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:38,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:38,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:43:38,715 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:38,716 INFO L82 PathProgramCache]: Analyzing trace with hash -548689751, now seen corresponding path program 9 times [2020-10-26 19:43:38,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:38,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987091326] [2020-10-26 19:43:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:38,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:38,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:39,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:40,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:43,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:43:43,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:43:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:43:43,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:43,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:43:43,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:43,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:43:43,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:43,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:43,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:43,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:43,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:43,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:43,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:43,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:43,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:43,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:43,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:43,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:43,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:43,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:43:43,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:43,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:43,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:43,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:43:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:43,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:43,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:43:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:43,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:43,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:43,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:43,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:43,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:43,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:43,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:43:43,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:43,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:43:43,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987091326] [2020-10-26 19:43:43,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:43,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:43:43,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214459386] [2020-10-26 19:43:43,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:43:43,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:43:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:43:43,963 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 11 states. [2020-10-26 19:43:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:44,654 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2020-10-26 19:43:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:43:44,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-26 19:43:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:44,657 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:43:44,657 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:43:44,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:43:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:43:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-10-26 19:43:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:43:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-26 19:43:44,674 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 53 [2020-10-26 19:43:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:44,674 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-26 19:43:44,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:43:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-26 19:43:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:43:44,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:44,675 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 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] [2020-10-26 19:43:44,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:43:44,676 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:44,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:44,676 INFO L82 PathProgramCache]: Analyzing trace with hash 782381643, now seen corresponding path program 10 times [2020-10-26 19:43:44,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:44,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863419022] [2020-10-26 19:43:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:44,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:44,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:44,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:45,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:48,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:48,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:48,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:49,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:43:49,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:43:49,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:43:49,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:49,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:43:49,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:49,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:43:49,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:49,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:49,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:49,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:49,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:49,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:49,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:49,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:49,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:49,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:49,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:49,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:49,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:49,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:49,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:43:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:49,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:49,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:49,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:49,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:43:49,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:49,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:43:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:49,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:49,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:43:49,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863419022] [2020-10-26 19:43:49,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:49,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:43:49,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685533141] [2020-10-26 19:43:49,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:43:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:43:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:43:49,972 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 13 states. [2020-10-26 19:43:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:51,217 INFO L93 Difference]: Finished difference Result 162 states and 173 transitions. [2020-10-26 19:43:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:43:51,218 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-26 19:43:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:51,220 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:43:51,220 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:43:51,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:43:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:43:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 102. [2020-10-26 19:43:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:43:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-26 19:43:51,243 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 55 [2020-10-26 19:43:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:51,244 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-26 19:43:51,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:43:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-26 19:43:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:43:51,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:51,245 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 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] [2020-10-26 19:43:51,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:43:51,245 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash 41737069, now seen corresponding path program 11 times [2020-10-26 19:43:51,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:51,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57223335] [2020-10-26 19:43:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:51,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:56,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:56,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:43:56,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:43:56,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:43:56,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:43:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:43:56,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:57,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:57,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:57,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:57,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:57,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:57,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:57,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:57,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:57,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:57,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:57,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:57,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:57,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:57,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:57,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:57,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:57,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:57,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:57,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:43:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:57,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:57,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:57,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:57,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:57,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:43:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:57,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:57,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:43:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:57,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:57,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:57,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:43:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:43:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:43:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:43:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:43:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57223335] [2020-10-26 19:43:57,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:57,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:43:57,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228330531] [2020-10-26 19:43:57,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:43:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:43:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:43:57,263 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 22 states. [2020-10-26 19:43:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:59,071 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:43:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:43:59,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-26 19:43:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:59,075 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:43:59,075 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:43:59,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:43:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:43:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2020-10-26 19:43:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:43:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-10-26 19:43:59,097 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 57 [2020-10-26 19:43:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:59,098 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-10-26 19:43:59,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:43:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-10-26 19:43:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:43:59,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:59,099 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 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] [2020-10-26 19:43:59,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:43:59,099 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1246872591, now seen corresponding path program 12 times [2020-10-26 19:43:59,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:59,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235533300] [2020-10-26 19:43:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:59,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:59,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:44:04,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:44:04,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:44:04,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:44:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:44:04,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:05,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:05,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:05,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:05,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:44:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:05,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:05,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:05,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:44:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:05,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:05,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:44:05,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235533300] [2020-10-26 19:44:05,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:05,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:44:05,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978259328] [2020-10-26 19:44:05,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:44:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:44:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:44:05,272 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 24 states. [2020-10-26 19:44:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:09,007 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2020-10-26 19:44:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:44:09,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-26 19:44:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:09,010 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:44:09,010 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:44:09,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:44:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:44:09,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 118. [2020-10-26 19:44:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:44:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-10-26 19:44:09,032 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 59 [2020-10-26 19:44:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:09,033 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-10-26 19:44:09,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:44:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-10-26 19:44:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:44:09,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:09,034 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-26 19:44:09,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:44:09,034 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:09,035 INFO L82 PathProgramCache]: Analyzing trace with hash -985061805, now seen corresponding path program 13 times [2020-10-26 19:44:09,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:09,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455463120] [2020-10-26 19:44:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:09,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:09,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:09,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:44:14,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:44:14,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:44:14,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:44:14,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:14,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:14,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:14,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:14,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:14,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:14,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:14,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:14,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:44:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:14,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:14,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:14,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:14,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:44:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:14,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:14,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:14,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:14,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:14,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:14,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:44:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:14,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:14,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:14,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:14,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:14,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:14,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:14,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:14,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:14,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:44:14,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455463120] [2020-10-26 19:44:14,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:14,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:44:14,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760745429] [2020-10-26 19:44:14,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:44:14,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:14,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:44:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:14,306 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 12 states. [2020-10-26 19:44:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:15,162 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-26 19:44:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:44:15,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-26 19:44:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:15,166 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:44:15,167 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:44:15,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:44:15,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:44:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2020-10-26 19:44:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:44:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2020-10-26 19:44:15,201 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 61 [2020-10-26 19:44:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:15,201 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2020-10-26 19:44:15,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:44:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2020-10-26 19:44:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:44:15,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:15,202 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 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] [2020-10-26 19:44:15,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:44:15,203 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -259060687, now seen corresponding path program 14 times [2020-10-26 19:44:15,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:15,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648366635] [2020-10-26 19:44:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 19:44:20,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:21,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:21,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:21,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:21,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:21,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:21,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:21,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:21,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:44:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:21,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:21,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:21,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:21,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:44:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:21,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:21,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:21,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:21,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:21,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:21,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-26 19:44:21,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648366635] [2020-10-26 19:44:21,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:21,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:44:21,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758790025] [2020-10-26 19:44:21,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:44:21,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:44:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:44:21,809 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 27 states. [2020-10-26 19:44:24,763 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-26 19:44:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:27,876 INFO L93 Difference]: Finished difference Result 168 states and 185 transitions. [2020-10-26 19:44:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:44:27,877 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-26 19:44:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:27,880 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:44:27,880 INFO L226 Difference]: Without dead ends: 165 [2020-10-26 19:44:27,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=347, Invalid=2733, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:44:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-26 19:44:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2020-10-26 19:44:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:44:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2020-10-26 19:44:27,906 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 61 [2020-10-26 19:44:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:27,906 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2020-10-26 19:44:27,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:44:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2020-10-26 19:44:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:44:27,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:27,908 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 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] [2020-10-26 19:44:27,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:44:27,908 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash 472511473, now seen corresponding path program 15 times [2020-10-26 19:44:27,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:27,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923890552] [2020-10-26 19:44:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:27,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:32,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 19:44:32,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:34,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:34,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:34,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:34,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:34,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:34,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:34,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:34,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:34,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:34,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:34,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:34,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:35,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:35,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:35,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:35,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:35,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:35,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:44:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:35,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:35,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:35,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:35,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:35,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:35,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:35,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:35,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:35,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:35,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:44:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:35,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:35,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:35,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:35,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:35,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:35,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:35,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:44:35,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923890552] [2020-10-26 19:44:35,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:35,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:44:35,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90773606] [2020-10-26 19:44:35,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:44:35,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:35,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:44:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:44:35,037 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand 31 states. [2020-10-26 19:44:38,355 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-26 19:44:38,622 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-26 19:44:39,099 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-26 19:44:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:42,705 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2020-10-26 19:44:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:44:42,707 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-10-26 19:44:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:42,709 INFO L225 Difference]: With dead ends: 167 [2020-10-26 19:44:42,709 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:44:42,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=442, Invalid=3718, Unknown=0, NotChecked=0, Total=4160 [2020-10-26 19:44:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:44:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2020-10-26 19:44:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:44:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2020-10-26 19:44:42,744 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 61 [2020-10-26 19:44:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:42,744 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2020-10-26 19:44:42,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:44:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2020-10-26 19:44:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:44:42,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:42,745 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2020-10-26 19:44:42,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:44:42,746 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash -244064779, now seen corresponding path program 16 times [2020-10-26 19:44:42,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:42,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358169979] [2020-10-26 19:44:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:42,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:43,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:44,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:46,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:47,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:47,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:44:47,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:44:47,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:44:47,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:44:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:44:47,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:49,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:49,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:49,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:44:49,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:49,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:49,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:49,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:44:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:49,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:49,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:49,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:49,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:49,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:49,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:44:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:49,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:49,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:49,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:49,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:44:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:49,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:49,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:49,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:49,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:44:49,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:44:49,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358169979] [2020-10-26 19:44:49,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:49,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:44:49,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951191628] [2020-10-26 19:44:49,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:44:49,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:44:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:44:49,117 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 25 states. [2020-10-26 19:44:50,813 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-26 19:44:51,038 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-26 19:44:51,388 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-26 19:44:51,854 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-10-26 19:44:52,028 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-26 19:44:52,276 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-26 19:44:52,451 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-26 19:44:52,883 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-10-26 19:44:53,454 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-26 19:44:53,717 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-26 19:44:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:53,788 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2020-10-26 19:44:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:44:53,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-26 19:44:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:53,791 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:44:53,791 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:44:53,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:44:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:44:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-26 19:44:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:44:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-10-26 19:44:53,812 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 63 [2020-10-26 19:44:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:53,812 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-10-26 19:44:53,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:44:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-10-26 19:44:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:44:53,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:53,813 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 3, 3, 3, 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] [2020-10-26 19:44:53,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:44:53,813 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash -659180717, now seen corresponding path program 17 times [2020-10-26 19:44:53,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:53,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778278055] [2020-10-26 19:44:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:54,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:58,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:58,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:44:58,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:44:58,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:44:58,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:58,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:44:58,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:44:58,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:44:58,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:59,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:59,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:59,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:44:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:59,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:59,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:59,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:59,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:59,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:59,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:59,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:44:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:59,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:59,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:59,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:59,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:59,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:59,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:59,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:59,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:44:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:59,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:59,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:59,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:44:59,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:59,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:44:59,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:59,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:59,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:44:59,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:59,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:44:59,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778278055] [2020-10-26 19:44:59,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:59,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:44:59,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381636725] [2020-10-26 19:44:59,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:44:59,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:44:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:44:59,191 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 16 states. [2020-10-26 19:45:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:01,259 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2020-10-26 19:45:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:45:01,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-26 19:45:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:01,263 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:45:01,263 INFO L226 Difference]: Without dead ends: 165 [2020-10-26 19:45:01,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:45:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-26 19:45:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 124. [2020-10-26 19:45:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:45:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2020-10-26 19:45:01,294 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 63 [2020-10-26 19:45:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:01,294 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2020-10-26 19:45:01,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:45:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2020-10-26 19:45:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:45:01,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:01,296 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 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] [2020-10-26 19:45:01,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:45:01,296 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1974745717, now seen corresponding path program 18 times [2020-10-26 19:45:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:01,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075583658] [2020-10-26 19:45:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:01,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:01,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:06,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:45:06,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:06,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:06,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:06,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:45:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:06,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:45:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:06,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:06,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:06,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:06,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:06,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:06,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:06,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:06,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:06,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 29 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:45:06,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075583658] [2020-10-26 19:45:06,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:06,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:45:06,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666826526] [2020-10-26 19:45:06,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:45:06,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:06,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:45:06,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:45:06,758 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand 18 states. [2020-10-26 19:45:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:09,276 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions. [2020-10-26 19:45:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:45:09,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-10-26 19:45:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:09,281 INFO L225 Difference]: With dead ends: 218 [2020-10-26 19:45:09,281 INFO L226 Difference]: Without dead ends: 192 [2020-10-26 19:45:09,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:45:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-26 19:45:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 128. [2020-10-26 19:45:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:45:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-10-26 19:45:09,308 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 65 [2020-10-26 19:45:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:09,309 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-10-26 19:45:09,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:45:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-10-26 19:45:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:45:09,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:09,310 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-10-26 19:45:09,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:45:09,310 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:09,311 INFO L82 PathProgramCache]: Analyzing trace with hash -976718983, now seen corresponding path program 19 times [2020-10-26 19:45:09,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:09,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186203601] [2020-10-26 19:45:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:09,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:09,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:10,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:11,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:12,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:13,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:45:14,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:15,065 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-26 19:45:15,221 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-10-26 19:45:15,398 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-10-26 19:45:15,558 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-10-26 19:45:15,737 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-26 19:45:15,909 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-26 19:45:16,183 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-26 19:45:16,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:16,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:16,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:16,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:16,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:45:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:16,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:45:16,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:16,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:16,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:45:16,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:45:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:16,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:45:16,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:45:16,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:16,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:45:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:45:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:16,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:16,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:16,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:16,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:16,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:45:16,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:45:16,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186203601] [2020-10-26 19:45:16,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:16,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:45:16,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296259429] [2020-10-26 19:45:16,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:45:16,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:45:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:45:16,983 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 28 states. [2020-10-26 19:45:17,796 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-26 19:45:18,058 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-26 19:45:18,599 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-26 19:45:18,821 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 19:45:19,053 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-26 19:45:19,329 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-26 19:45:19,595 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-26 19:45:20,145 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 82 [2020-10-26 19:45:20,347 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 19:45:20,759 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-26 19:45:21,051 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-26 19:45:21,286 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-26 19:45:21,693 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-26 19:45:22,160 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-26 19:45:22,402 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-26 19:45:22,630 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-26 19:45:22,926 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-26 19:45:23,186 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-26 19:45:23,441 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-26 19:45:23,929 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-26 19:45:24,234 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-26 19:45:24,674 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-26 19:45:24,976 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-26 19:45:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:25,359 INFO L93 Difference]: Finished difference Result 168 states and 186 transitions. [2020-10-26 19:45:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:45:25,361 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2020-10-26 19:45:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:25,363 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:45:25,363 INFO L226 Difference]: Without dead ends: 165 [2020-10-26 19:45:25,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=605, Invalid=2817, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:45:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-26 19:45:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2020-10-26 19:45:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-26 19:45:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2020-10-26 19:45:25,409 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 67 [2020-10-26 19:45:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:25,409 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2020-10-26 19:45:25,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:45:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2020-10-26 19:45:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:45:25,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:25,411 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 3, 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] [2020-10-26 19:45:25,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:45:25,411 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash -852655849, now seen corresponding path program 20 times [2020-10-26 19:45:25,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:25,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142789999] [2020-10-26 19:45:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:25,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:25,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:25,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:30,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 19:45:30,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:30,981 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-10-26 19:45:31,257 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-10-26 19:45:31,435 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-26 19:45:31,594 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-26 19:45:31,779 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-10-26 19:45:33,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:33,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:33,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:33,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:33,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:33,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:33,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:33,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:33,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:33,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:33,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:33,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:33,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:45:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:33,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:45:33,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:33,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:45:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:33,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:45:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:45:33,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142789999] [2020-10-26 19:45:33,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:33,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:45:33,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142153256] [2020-10-26 19:45:33,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:45:33,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:33,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:45:33,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=981, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:45:33,857 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand 33 states. [2020-10-26 19:45:34,364 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-26 19:45:34,624 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-26 19:45:35,008 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-26 19:45:36,258 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-26 19:45:37,022 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-26 19:45:37,245 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-26 19:45:37,806 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-26 19:45:38,332 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-26 19:45:38,639 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-26 19:45:38,947 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-26 19:45:39,270 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-26 19:45:39,540 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-26 19:45:39,918 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:45:40,241 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-26 19:45:40,658 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-26 19:45:41,080 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-26 19:45:41,853 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-26 19:45:42,363 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-26 19:45:42,602 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-26 19:45:42,852 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-26 19:45:43,160 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-26 19:45:43,759 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-26 19:45:44,098 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-26 19:45:44,401 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-26 19:45:44,757 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-26 19:45:45,088 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-26 19:45:45,492 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-26 19:45:45,810 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-26 19:45:46,128 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:45:46,502 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-26 19:45:46,913 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-26 19:45:47,216 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-26 19:45:47,481 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-26 19:45:47,974 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-26 19:45:48,221 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-26 19:45:48,456 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-26 19:45:48,782 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-26 19:45:48,994 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-26 19:45:49,204 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-26 19:45:49,490 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-26 19:45:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:49,497 INFO L93 Difference]: Finished difference Result 215 states and 241 transitions. [2020-10-26 19:45:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-26 19:45:49,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-10-26 19:45:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:49,501 INFO L225 Difference]: With dead ends: 215 [2020-10-26 19:45:49,501 INFO L226 Difference]: Without dead ends: 212 [2020-10-26 19:45:49,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=710, Invalid=7662, Unknown=0, NotChecked=0, Total=8372 [2020-10-26 19:45:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-26 19:45:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 189. [2020-10-26 19:45:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-26 19:45:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 210 transitions. [2020-10-26 19:45:49,552 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 210 transitions. Word has length 67 [2020-10-26 19:45:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:49,552 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 210 transitions. [2020-10-26 19:45:49,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:45:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 210 transitions. [2020-10-26 19:45:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:45:49,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:49,554 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 3, 3, 3, 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] [2020-10-26 19:45:49,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:45:49,554 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1143951623, now seen corresponding path program 21 times [2020-10-26 19:45:49,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:49,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924918736] [2020-10-26 19:45:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:49,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:49,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:50,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:54,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:54,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:45:54,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:45:54,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:45:54,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:45:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:45:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:45:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:56,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:56,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:45:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:56,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:45:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:56,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:56,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:56,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:56,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:45:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:45:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:45:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:45:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:45:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:56,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:56,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:56,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:45:56,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:56,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:45:56,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:45:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:56,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:45:56,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924918736] [2020-10-26 19:45:56,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:56,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:45:56,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805705535] [2020-10-26 19:45:56,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:45:56,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:45:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:45:56,270 INFO L87 Difference]: Start difference. First operand 189 states and 210 transitions. Second operand 27 states. [2020-10-26 19:46:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:00,340 INFO L93 Difference]: Finished difference Result 226 states and 252 transitions. [2020-10-26 19:46:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:46:00,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2020-10-26 19:46:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:00,344 INFO L225 Difference]: With dead ends: 226 [2020-10-26 19:46:00,345 INFO L226 Difference]: Without dead ends: 204 [2020-10-26 19:46:00,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=478, Invalid=1874, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:46:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-26 19:46:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 191. [2020-10-26 19:46:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-26 19:46:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 212 transitions. [2020-10-26 19:46:00,392 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 212 transitions. Word has length 69 [2020-10-26 19:46:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:00,393 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 212 transitions. [2020-10-26 19:46:00,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:46:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 212 transitions. [2020-10-26 19:46:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:46:00,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:00,395 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 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] [2020-10-26 19:46:00,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:46:00,395 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1578912003, now seen corresponding path program 22 times [2020-10-26 19:46:00,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:00,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080912339] [2020-10-26 19:46:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:00,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:01,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:04,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:05,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:05,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:46:05,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:46:05,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:46:05,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:46:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:46:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 19:46:05,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:06,436 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40