/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/ms4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:38:30,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:38:30,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:38:31,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:38:31,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:38:31,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:38:31,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:38:31,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:38:31,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:38:31,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:38:31,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:38:31,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:38:31,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:38:31,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:38:31,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:38:31,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:38:31,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:38:31,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:38:31,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:38:31,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:38:31,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:38:31,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:38:31,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:38:31,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:38:31,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:38:31,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:38:31,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:38:31,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:38:31,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:38:31,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:38:31,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:38:31,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:38:31,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:38:31,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:38:31,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:38:31,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:38:31,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:38:31,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:38:31,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:38:31,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:38:31,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:38:31,103 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 19:38:31,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:38:31,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:38:31,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:38:31,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:38:31,154 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:38:31,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:38:31,154 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:38:31,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:38:31,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:38:31,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:38:31,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:38:31,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:38:31,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:38:31,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:38:31,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:38:31,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:38:31,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:38:31,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:38:31,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:38:31,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:38:31,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:38:31,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:38:31,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:38:31,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:38:31,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:38:31,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:38:31,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:38:31,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:38:31,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:38:31,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:38:31,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:38:31,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:38:31,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:38:31,618 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:38:31,619 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:38:31,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms4.c [2020-10-26 19:38:31,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/743cbc0fa/8b63fe05ca7a4bcaa64efc6285de4f32/FLAG3ddb701a9 [2020-10-26 19:38:32,268 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:38:32,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms4.c [2020-10-26 19:38:32,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/743cbc0fa/8b63fe05ca7a4bcaa64efc6285de4f32/FLAG3ddb701a9 [2020-10-26 19:38:32,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/743cbc0fa/8b63fe05ca7a4bcaa64efc6285de4f32 [2020-10-26 19:38:32,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:38:32,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:38:32,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:32,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:38:32,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:38:32,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ef5d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32, skipping insertion in model container [2020-10-26 19:38:32,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:38:32,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:38:32,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:32,848 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:38:32,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:32,888 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:38:32,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32 WrapperNode [2020-10-26 19:38:32,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:32,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:38:32,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:38:32,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:38:32,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (1/1) ... [2020-10-26 19:38:32,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:38:32,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:38:32,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:38:32,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:38:32,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (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 19:38:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:38:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:38:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:38:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:38:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:38:33,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:38:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:38:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:38:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:38:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:38:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:38:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:38:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:38:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:38:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:38:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:38:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:38:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:38:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:38:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:38:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:38:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:38:33,334 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:38:33,335 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:38:33,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:33 BoogieIcfgContainer [2020-10-26 19:38:33,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:38:33,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:38:33,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:38:33,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:38:33,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:38:32" (1/3) ... [2020-10-26 19:38:33,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446b1cf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:33, skipping insertion in model container [2020-10-26 19:38:33,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:32" (2/3) ... [2020-10-26 19:38:33,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446b1cf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:33, skipping insertion in model container [2020-10-26 19:38:33,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:33" (3/3) ... [2020-10-26 19:38:33,347 INFO L111 eAbstractionObserver]: Analyzing ICFG ms4.c [2020-10-26 19:38:33,362 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:38:33,366 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:38:33,382 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:38:33,412 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:38:33,412 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:38:33,413 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:38:33,413 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:38:33,413 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:38:33,413 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:38:33,413 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:38:33,413 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:38:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-26 19:38:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:38:33,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:33,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:33,440 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-26 19:38:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:33,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236329645] [2020-10-26 19:38:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:33,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:34,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:38:34,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:34,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-26 19:38:34,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:38:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:38:34,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:38:34,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:34,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:34,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:34,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:34,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:38:34,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:34,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:34,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:34,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:34,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:34,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:34,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:34,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:34,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:34,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:38:34,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:34,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:34,381 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 19:38:34,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236329645] [2020-10-26 19:38:34,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:38:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630753395] [2020-10-26 19:38:34,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:38:34,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:34,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:38:34,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:38:34,407 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-26 19:38:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:34,610 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-26 19:38:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:38:34,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:38:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:34,620 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:38:34,620 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:38:34,623 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 19:38:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:38:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:38:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:38:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 19:38:34,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-26 19:38:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 19:38:34,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:38:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 19:38:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:34,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:34,669 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 19:38:34,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:38:34,669 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-26 19:38:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:34,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163683404] [2020-10-26 19:38:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:34,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:35,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:35,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-26 19:38:35,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:38:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:38:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:35,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:35,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:35,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:35,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:35,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:35,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:35,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:35,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:35,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:35,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:35,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:35,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:35,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:35,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:35,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:35,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:35,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163683404] [2020-10-26 19:38:35,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:35,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:38:35,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527755204] [2020-10-26 19:38:35,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:38:35,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:38:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:38:35,732 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-26 19:38:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:35,975 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-26 19:38:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:38:35,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-26 19:38:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:35,977 INFO L225 Difference]: With dead ends: 38 [2020-10-26 19:38:35,977 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:38:35,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:38:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:38:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-26 19:38:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:38:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-26 19:38:35,986 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-26 19:38:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:35,987 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-26 19:38:35,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:38:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-26 19:38:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:35,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:35,988 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 19:38:35,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:38:35,989 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-26 19:38:35,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:35,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385910652] [2020-10-26 19:38:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:36,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:36,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:36,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-26 19:38:36,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:38:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:38:36,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:36,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:36,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:38:36,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:36,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:36,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:36,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:36,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:36,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:36,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:36,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:36,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:36,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:36,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:36,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:36,986 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 19:38:36,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385910652] [2020-10-26 19:38:36,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:36,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:38:36,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946121949] [2020-10-26 19:38:36,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:38:36,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:38:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:38:36,989 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-26 19:38:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:37,254 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-26 19:38:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:38:37,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-26 19:38:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:37,256 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:38:37,256 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:38:37,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:38:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-26 19:38:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:38:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-26 19:38:37,265 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-26 19:38:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:37,265 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-26 19:38:37,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:38:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-26 19:38:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:38:37,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:37,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:37,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:38:37,267 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1079019474, now seen corresponding path program 1 times [2020-10-26 19:38:37,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:37,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244925391] [2020-10-26 19:38:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:37,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:41,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:38:41,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:38:41,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4049 [2020-10-26 19:38:41,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:41,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:38:41,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:41,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:38:41,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:41,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:41,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:41,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:41,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:41,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:38:41,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:41,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:41,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:41,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:41,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:41,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:41,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:41,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:41,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:41,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:41,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:41,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:42,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244925391] [2020-10-26 19:38:42,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:42,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:38:42,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907619589] [2020-10-26 19:38:42,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:38:42,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:38:42,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:38:42,006 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-10-26 19:38:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:42,886 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-26 19:38:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:38:42,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-26 19:38:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:42,889 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:38:42,889 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:38:42,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:38:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:38:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-26 19:38:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:38:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:38:42,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2020-10-26 19:38:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:42,902 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:38:42,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:38:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:38:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:38:42,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:42,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:38:42,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:38:42,905 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:42,906 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 2 times [2020-10-26 19:38:42,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:42,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600376299] [2020-10-26 19:38:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:42,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:47,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:38:47,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:38:47,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:38:47,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:47,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:38:47,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:47,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:38:47,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:48,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:48,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:48,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:48,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:48,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:48,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:38:48,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:48,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:48,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:48,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:48,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:48,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:48,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:48,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:48,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 19:38:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:48,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600376299] [2020-10-26 19:38:48,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:48,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:38:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656018532] [2020-10-26 19:38:48,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:38:48,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:38:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:38:48,168 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 13 states. [2020-10-26 19:38:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:48,701 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-26 19:38:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:38:48,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:38:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:48,703 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:38:48,703 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:38:48,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:38:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:38:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-26 19:38:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:38:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-26 19:38:48,723 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 35 [2020-10-26 19:38:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:48,725 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-26 19:38:48,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:38:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-26 19:38:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:38:48,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:48,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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 19:38:48,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:38:48,727 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash -639202741, now seen corresponding path program 3 times [2020-10-26 19:38:48,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:48,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522631494] [2020-10-26 19:38:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:48,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:52,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:38:52,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:38:52,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4084 [2020-10-26 19:38:52,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:38:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:38:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:53,275 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 28 [2020-10-26 19:38:53,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:53,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:53,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:53,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:53,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:53,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:54,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:54,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:54,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:54,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:54,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522631494] [2020-10-26 19:38:54,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:54,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:38:54,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066488150] [2020-10-26 19:38:54,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:38:54,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:38:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:38:54,022 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 19 states. [2020-10-26 19:38:54,428 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:38:54,885 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-26 19:38:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:56,128 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-26 19:38:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:38:56,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-26 19:38:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:56,130 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:38:56,130 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:38:56,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:38:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:38:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-10-26 19:38:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:38:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-26 19:38:56,158 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 37 [2020-10-26 19:38:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:56,158 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-26 19:38:56,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:38:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-26 19:38:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:38:56,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:56,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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 19:38:56,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:38:56,160 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:56,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1842075536, now seen corresponding path program 4 times [2020-10-26 19:38:56,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:56,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27572963] [2020-10-26 19:38:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:01,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:39:01,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:39:01,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:39:01,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:01,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:39:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:39:01,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:39:01,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:01,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:01,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:01,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:01,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:01,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:01,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:01,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:01,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:01,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:01,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:01,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:01,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:01,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:01,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:01,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:39:01,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27572963] [2020-10-26 19:39:01,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:01,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:01,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745615202] [2020-10-26 19:39:01,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:01,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:01,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:01,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:01,636 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 16 states. [2020-10-26 19:39:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:02,511 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-26 19:39:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:39:02,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-26 19:39:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:02,513 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:39:02,513 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:39:02,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:39:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:39:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-26 19:39:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:39:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 19:39:02,525 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2020-10-26 19:39:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:02,525 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 19:39:02,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 19:39:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:39:02,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:02,527 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:02,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:39:02,527 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 5 times [2020-10-26 19:39:02,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:02,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207522271] [2020-10-26 19:39:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:07,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:39:07,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:39:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:39:07,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:39:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:39:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:07,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:07,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:07,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:07,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:07,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:07,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:07,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:07,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207522271] [2020-10-26 19:39:07,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:07,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:07,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445053170] [2020-10-26 19:39:07,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:07,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:07,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:07,852 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2020-10-26 19:39:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:08,582 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-26 19:39:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:39:08,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:39:08,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:08,585 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:39:08,585 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:39:08,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:39:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:39:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-26 19:39:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:39:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-26 19:39:08,598 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2020-10-26 19:39:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:08,599 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-26 19:39:08,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-26 19:39:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:39:08,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:08,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:08,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:39:08,600 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:08,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 6 times [2020-10-26 19:39:08,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:08,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812468363] [2020-10-26 19:39:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:14,278 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-10-26 19:39:14,640 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-26 19:39:14,803 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-26 19:39:15,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:15,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:15,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:15,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:15,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:15,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:15,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:15,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:15,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812468363] [2020-10-26 19:39:15,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:15,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:39:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147897931] [2020-10-26 19:39:15,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:39:15,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:39:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:39:15,439 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 23 states. [2020-10-26 19:39:15,816 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-26 19:39:16,015 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-10-26 19:39:16,346 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-26 19:39:16,630 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-26 19:39:16,801 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-26 19:39:17,497 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 119 [2020-10-26 19:39:17,793 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2020-10-26 19:39:18,145 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 103 [2020-10-26 19:39:18,396 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-26 19:39:18,599 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:39:18,837 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-26 19:39:19,025 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-26 19:39:19,956 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-26 19:39:20,200 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-26 19:39:20,459 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-26 19:39:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:20,680 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-26 19:39:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:39:20,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-26 19:39:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:20,682 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:39:20,682 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:39:20,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:39:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:39:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-10-26 19:39:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:39:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-26 19:39:20,711 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2020-10-26 19:39:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:20,711 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-26 19:39:20,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:39:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-26 19:39:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:39:20,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:20,716 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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 19:39:20,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:39:20,721 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1286510121, now seen corresponding path program 7 times [2020-10-26 19:39:20,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:20,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559585246] [2020-10-26 19:39:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:39:25,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:26,429 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-26 19:39:26,699 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-26 19:39:26,858 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-26 19:39:27,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:27,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:39:27,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:27,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:27,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:27,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:27,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:27,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:27,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:27,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:39:27,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559585246] [2020-10-26 19:39:27,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:27,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:39:27,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956659890] [2020-10-26 19:39:27,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:39:27,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:39:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:39:27,326 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 20 states. [2020-10-26 19:39:27,911 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-26 19:39:28,208 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-26 19:39:28,818 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-10-26 19:39:28,994 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-26 19:39:29,202 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-26 19:39:29,384 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-26 19:39:29,714 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-26 19:39:29,871 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-26 19:39:30,072 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-26 19:39:30,247 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-26 19:39:30,501 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-26 19:39:30,769 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-26 19:39:31,071 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-26 19:39:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:31,202 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-26 19:39:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:39:31,203 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-26 19:39:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:31,204 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:39:31,205 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:39:31,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:39:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:39:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-26 19:39:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:39:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-26 19:39:31,220 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 43 [2020-10-26 19:39:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:31,221 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-26 19:39:31,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:39:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-26 19:39:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:39:31,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:31,223 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:31,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:39:31,223 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 8 times [2020-10-26 19:39:31,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:31,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812455941] [2020-10-26 19:39:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:39:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:36,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:36,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:36,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:36,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:36,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:36,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:36,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:36,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:36,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:36,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:36,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:36,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812455941] [2020-10-26 19:39:36,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:36,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:39:36,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001668764] [2020-10-26 19:39:36,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:39:36,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:39:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:39:36,654 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 19 states. [2020-10-26 19:39:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:37,644 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2020-10-26 19:39:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:39:37,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-26 19:39:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:37,646 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:39:37,647 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:39:37,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=1211, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:39:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:39:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-10-26 19:39:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:39:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-26 19:39:37,663 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 45 [2020-10-26 19:39:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:37,664 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-26 19:39:37,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:39:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-26 19:39:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:39:37,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:37,665 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:37,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:39:37,665 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1091709585, now seen corresponding path program 9 times [2020-10-26 19:39:37,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:37,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69979799] [2020-10-26 19:39:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:37,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:40,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:40,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:40,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:42,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:42,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:39:42,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:39:42,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:39:42,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:42,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:39:42,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:42,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 19:39:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:43,335 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-10-26 19:39:43,570 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 50 [2020-10-26 19:39:44,018 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 69 [2020-10-26 19:39:44,558 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 68 [2020-10-26 19:39:45,219 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 89 [2020-10-26 19:39:45,565 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-26 19:39:45,773 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-26 19:39:46,272 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 94 [2020-10-26 19:39:46,731 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 99 [2020-10-26 19:39:47,123 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 74 [2020-10-26 19:39:47,420 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 67 [2020-10-26 19:39:47,679 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-10-26 19:39:47,881 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 39 [2020-10-26 19:39:48,132 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-10-26 19:39:48,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:48,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:48,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:48,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:48,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:48,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:48,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:48,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:48,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:48,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:48,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:48,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:48,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:48,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:48,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:48,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:48,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:48,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:48,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:48,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69979799] [2020-10-26 19:39:48,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:48,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:39:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963852992] [2020-10-26 19:39:48,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:39:48,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:39:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:39:48,839 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 27 states. [2020-10-26 19:39:50,026 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 147 [2020-10-26 19:39:50,557 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 95 [2020-10-26 19:39:50,839 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-26 19:39:51,232 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 110 [2020-10-26 19:39:52,192 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 136 [2020-10-26 19:39:52,481 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-26 19:39:53,082 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 103 [2020-10-26 19:39:53,845 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 132 [2020-10-26 19:39:57,861 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 331 DAG size of output: 274 [2020-10-26 19:39:59,571 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 243 DAG size of output: 194 [2020-10-26 19:40:01,335 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 253 DAG size of output: 196 [2020-10-26 19:40:01,953 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 136 [2020-10-26 19:40:02,506 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-26 19:40:02,834 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-26 19:40:03,476 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-10-26 19:40:04,501 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 148 [2020-10-26 19:40:04,792 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-26 19:40:05,053 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-26 19:40:05,265 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-26 19:40:05,735 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-10-26 19:40:06,325 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-26 19:40:06,624 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-10-26 19:40:08,321 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 184 DAG size of output: 179 [2020-10-26 19:40:09,814 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 183 DAG size of output: 178 [2020-10-26 19:40:11,312 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 186 DAG size of output: 181 [2020-10-26 19:40:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:11,621 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-26 19:40:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:40:11,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 47 [2020-10-26 19:40:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:11,624 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:40:11,624 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:40:11,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=439, Invalid=3101, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:40:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:40:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-10-26 19:40:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:40:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-26 19:40:11,643 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 47 [2020-10-26 19:40:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:11,643 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-26 19:40:11,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:40:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-26 19:40:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:40:11,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:11,645 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 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 19:40:11,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:40:11,646 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash -386933268, now seen corresponding path program 10 times [2020-10-26 19:40:11,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:11,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730937957] [2020-10-26 19:40:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:11,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:11,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:12,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:13,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:13,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:40:16,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:17,164 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2020-10-26 19:40:17,340 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2020-10-26 19:40:17,570 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-10-26 19:40:17,697 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-26 19:40:17,950 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 19:40:18,150 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 19:40:18,351 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-26 19:40:19,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:19,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:19,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:19,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:19,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:19,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:19,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:19,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:40:19,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730937957] [2020-10-26 19:40:19,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:19,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:40:19,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837290553] [2020-10-26 19:40:19,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:40:19,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:19,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:40:19,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:40:19,181 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 24 states. [2020-10-26 19:40:19,564 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:40:19,783 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 19:40:20,064 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-26 19:40:20,465 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-26 19:40:20,671 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 19:40:21,285 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-10-26 19:40:21,459 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-26 19:40:21,922 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-10-26 19:40:22,130 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-26 19:40:22,417 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-10-26 19:40:22,754 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-26 19:40:23,138 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-26 19:40:23,495 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-26 19:40:23,967 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-26 19:40:24,280 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-26 19:40:24,582 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-26 19:40:24,970 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 100 [2020-10-26 19:40:25,258 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-26 19:40:25,512 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-26 19:40:25,882 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-26 19:40:26,132 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-26 19:40:26,758 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 118 [2020-10-26 19:40:27,375 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2020-10-26 19:40:28,054 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 117 [2020-10-26 19:40:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:28,225 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-10-26 19:40:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:40:28,226 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-26 19:40:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:28,227 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:40:28,227 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:40:28,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=357, Invalid=2295, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:40:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:40:28,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-26 19:40:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:40:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-26 19:40:28,242 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 48 [2020-10-26 19:40:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:28,242 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-26 19:40:28,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:40:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-26 19:40:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:40:28,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:28,243 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:28,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:40:28,243 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:28,244 INFO L82 PathProgramCache]: Analyzing trace with hash -527027768, now seen corresponding path program 11 times [2020-10-26 19:40:28,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:28,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713141610] [2020-10-26 19:40:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:40:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:33,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:33,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:33,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:33,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:33,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:33,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713141610] [2020-10-26 19:40:33,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:33,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:40:33,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941142440] [2020-10-26 19:40:33,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:40:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:40:33,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:40:33,882 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 22 states. [2020-10-26 19:40:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:35,484 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-26 19:40:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:40:35,485 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-26 19:40:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:35,487 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:40:35,487 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:40:35,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=464, Invalid=1698, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:40:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:40:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2020-10-26 19:40:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:40:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-10-26 19:40:35,505 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 50 [2020-10-26 19:40:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:35,506 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-10-26 19:40:35,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:40:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-10-26 19:40:35,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:40:35,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:35,507 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:35,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:40:35,507 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:35,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1196207642, now seen corresponding path program 12 times [2020-10-26 19:40:35,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:35,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069170291] [2020-10-26 19:40:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:35,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:35,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:40,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:40:40,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0