/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/s2lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:56:11,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:56:11,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:56:11,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:56:11,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:56:11,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:56:11,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:56:11,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:56:11,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:56:11,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:56:11,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:56:11,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:56:11,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:56:11,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:56:11,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:56:11,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:56:11,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:56:11,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:56:11,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:56:11,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:56:11,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:56:11,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:56:11,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:56:11,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:56:12,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:56:12,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:56:12,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:56:12,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:56:12,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:56:12,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:56:12,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:56:12,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:56:12,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:56:12,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:56:12,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:56:12,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:56:12,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:56:12,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:56:12,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:56:12,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:56:12,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:56:12,045 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 [2020-10-29 03:56:12,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:56:12,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:56:12,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:56:12,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:56:12,114 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:56:12,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:56:12,116 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:56:12,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:56:12,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:56:12,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:56:12,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:56:12,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:56:12,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:56:12,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:56:12,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:56:12,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:56:12,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:56:12,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:56:12,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:56:12,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:56:12,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:56:12,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:56:12,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:56:12,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:56:12,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:56:12,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:56:12,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:56:12,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:56:12,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:56:12,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:56:12,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:56:12,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:56:12,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:56:12,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:56:12,601 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:56:12,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-29 03:56:12,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6db3cbc7/e64baf702672429a8aa1e0d52ef5aa35/FLAG00acb4929 [2020-10-29 03:56:13,356 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:56:13,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-29 03:56:13,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6db3cbc7/e64baf702672429a8aa1e0d52ef5aa35/FLAG00acb4929 [2020-10-29 03:56:13,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6db3cbc7/e64baf702672429a8aa1e0d52ef5aa35 [2020-10-29 03:56:13,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:56:13,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:56:13,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:56:13,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:56:13,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:56:13,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:56:13" (1/1) ... [2020-10-29 03:56:13,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377f8dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:13, skipping insertion in model container [2020-10-29 03:56:13,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:56:13" (1/1) ... [2020-10-29 03:56:13,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:56:13,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:56:14,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:56:14,093 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:56:14,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:56:14,162 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:56:14,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14 WrapperNode [2020-10-29 03:56:14,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:56:14,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:56:14,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:56:14,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:56:14,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (1/1) ... [2020-10-29 03:56:14,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (1/1) ... [2020-10-29 03:56:14,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (1/1) ... [2020-10-29 03:56:14,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (1/1) ... [2020-10-29 03:56:14,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (1/1) ... [2020-10-29 03:56:14,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (1/1) ... [2020-10-29 03:56:14,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (1/1) ... [2020-10-29 03:56:14,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:56:14,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:56:14,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:56:14,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:56:14,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (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 [2020-10-29 03:56:14,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:56:14,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:56:14,339 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:56:14,339 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:56:14,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:56:14,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:56:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:56:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:56:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:56:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:56:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:56:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:56:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:56:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:56:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:56:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:56:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:56:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:56:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:56:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:56:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:56:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:56:14,870 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:56:14,871 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 03:56:14,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:56:14 BoogieIcfgContainer [2020-10-29 03:56:14,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:56:14,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:56:14,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:56:14,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:56:14,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:56:13" (1/3) ... [2020-10-29 03:56:14,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7a09d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:56:14, skipping insertion in model container [2020-10-29 03:56:14,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:56:14" (2/3) ... [2020-10-29 03:56:14,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7a09d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:56:14, skipping insertion in model container [2020-10-29 03:56:14,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:56:14" (3/3) ... [2020-10-29 03:56:14,891 INFO L111 eAbstractionObserver]: Analyzing ICFG s2lif.c [2020-10-29 03:56:14,905 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:56:14,910 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:56:14,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:56:14,972 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:56:14,973 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:56:14,973 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:56:14,973 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:56:14,973 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:56:14,974 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:56:14,974 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:56:14,974 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:56:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-29 03:56:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 03:56:15,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:15,007 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] [2020-10-29 03:56:15,008 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-29 03:56:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:15,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729072874] [2020-10-29 03:56:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:15,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:15,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:15,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:16,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:16,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 03:56:16,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:56:16,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-29 03:56:16,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:16,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:16,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:56:16,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:56:16,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 03:56:16,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:56:16,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:16,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:16,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:16,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:16,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:16,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:56:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:16,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:16,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:16,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:16,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:16,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:16,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:56:16,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:56:16,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:16,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:16,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:56:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:56:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:16,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729072874] [2020-10-29 03:56:16,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:56:16,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:56:16,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308780214] [2020-10-29 03:56:16,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:56:16,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:56:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:56:16,331 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-29 03:56:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:16,612 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-10-29 03:56:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:56:16,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-29 03:56:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:16,622 INFO L225 Difference]: With dead ends: 76 [2020-10-29 03:56:16,623 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 03:56:16,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:56:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 03:56:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-29 03:56:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 03:56:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-29 03:56:16,672 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-29 03:56:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:16,673 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-29 03:56:16,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:56:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-29 03:56:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:56:16,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:16,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:16,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:56:16,675 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-29 03:56:16,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:16,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376261960] [2020-10-29 03:56:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:16,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:18,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:18,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:20,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:56:20,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:56:20,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3646 [2020-10-29 03:56:20,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:20,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:56:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:56:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:20,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:20,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:20,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:20,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:56:20,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:20,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:20,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:20,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:20,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:20,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:20,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:20,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:20,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:20,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:20,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:20,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:20,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:20,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376261960] [2020-10-29 03:56:20,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:20,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:56:20,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618084369] [2020-10-29 03:56:20,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:56:20,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:56:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:56:20,802 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-10-29 03:56:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:21,484 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-29 03:56:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:56:21,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-29 03:56:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:21,488 INFO L225 Difference]: With dead ends: 53 [2020-10-29 03:56:21,488 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 03:56:21,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:56:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 03:56:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-29 03:56:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 03:56:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-29 03:56:21,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 31 [2020-10-29 03:56:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:21,501 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-29 03:56:21,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:56:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-29 03:56:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:56:21,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:21,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:21,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:56:21,503 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-29 03:56:21,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:21,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478865029] [2020-10-29 03:56:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:21,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:21,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:21,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:22,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:22,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:56:22,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:56:22,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1337 [2020-10-29 03:56:22,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:22,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:56:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 03:56:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:23,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:23,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:23,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:23,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:23,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:23,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:23,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:23,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:23,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:23,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:23,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:23,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:23,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:23,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:23,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:23,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:23,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:23,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:23,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:23,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478865029] [2020-10-29 03:56:23,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:23,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:56:23,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114191181] [2020-10-29 03:56:23,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:56:23,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:23,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:56:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:56:23,107 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 11 states. [2020-10-29 03:56:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:23,605 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-29 03:56:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:56:23,606 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 03:56:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:23,607 INFO L225 Difference]: With dead ends: 73 [2020-10-29 03:56:23,607 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:56:23,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:56:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:56:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-10-29 03:56:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:56:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 03:56:23,620 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 31 [2020-10-29 03:56:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:23,620 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 03:56:23,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:56:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 03:56:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:56:23,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:23,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:23,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:56:23,623 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:23,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:23,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-29 03:56:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:23,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404343285] [2020-10-29 03:56:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:23,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:24,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:56:24,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:56:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-29 03:56:24,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:24,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:56:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 03:56:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:24,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:24,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:24,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:24,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:24,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:56:24,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:24,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:24,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:24,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:24,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:24,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:24,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:24,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:24,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:24,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:24,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:24,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:56:24,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404343285] [2020-10-29 03:56:24,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:24,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:56:24,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650344811] [2020-10-29 03:56:24,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:56:24,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:56:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:56:24,538 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 8 states. [2020-10-29 03:56:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:24,851 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2020-10-29 03:56:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:56:24,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 03:56:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:24,853 INFO L225 Difference]: With dead ends: 96 [2020-10-29 03:56:24,853 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 03:56:24,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:56:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 03:56:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2020-10-29 03:56:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:56:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-29 03:56:24,863 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 33 [2020-10-29 03:56:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:24,864 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-29 03:56:24,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:56:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-29 03:56:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:56:24,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:24,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:24,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:56:24,866 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2047640497, now seen corresponding path program 3 times [2020-10-29 03:56:24,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:24,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102341822] [2020-10-29 03:56:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:24,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:25,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:25,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:25,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:25,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:26,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:26,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:56:26,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:56:26,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1734 [2020-10-29 03:56:26,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:26,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:56:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:56:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:26,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:26,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:26,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:26,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:26,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:26,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:26,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:26,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:26,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:26,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:26,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:26,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:26,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:26,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:26,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:26,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:26,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:26,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:26,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:26,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:26,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:26,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:56:26,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102341822] [2020-10-29 03:56:26,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:26,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:56:26,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314178428] [2020-10-29 03:56:26,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:56:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:56:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:56:26,737 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 8 states. [2020-10-29 03:56:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:27,095 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-29 03:56:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:56:27,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 03:56:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:27,097 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:56:27,098 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 03:56:27,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:56:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 03:56:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2020-10-29 03:56:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:56:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-29 03:56:27,116 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-10-29 03:56:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:27,119 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-29 03:56:27,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:56:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-29 03:56:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 03:56:27,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:27,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:27,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:56:27,122 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:27,122 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 4 times [2020-10-29 03:56:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:27,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787537946] [2020-10-29 03:56:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:27,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:27,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:27,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:29,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:30,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:31,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:32,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:32,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:32,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 03:56:32,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:56:32,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-29 03:56:32,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:32,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:56:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:32,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:56:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:33,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:33,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:33,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:33,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:33,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:33,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:33,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787537946] [2020-10-29 03:56:33,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:33,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:56:33,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292074456] [2020-10-29 03:56:33,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:56:33,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:33,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:56:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:56:33,280 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-29 03:56:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:34,652 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-29 03:56:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:56:34,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-29 03:56:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:34,654 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:56:34,654 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 03:56:34,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:56:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 03:56:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-29 03:56:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:56:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-29 03:56:34,665 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-29 03:56:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:34,665 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-29 03:56:34,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:56:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-29 03:56:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 03:56:34,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:34,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:34,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:56:34,668 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 1 times [2020-10-29 03:56:34,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:34,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893637656] [2020-10-29 03:56:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:34,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:36,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:37,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:38,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:38,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 03:56:38,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:56:38,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4189 [2020-10-29 03:56:38,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:38,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:56:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:56:38,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:56:39,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:39,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:39,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:39,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:39,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:39,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:39,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:39,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:39,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:56:39,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:39,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:39,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:39,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:39,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:39,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:39,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:56:39,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893637656] [2020-10-29 03:56:39,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:39,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:56:39,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530314324] [2020-10-29 03:56:39,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:56:39,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:39,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:56:39,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:56:39,148 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 13 states. [2020-10-29 03:56:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:39,673 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-29 03:56:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:56:39,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 03:56:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:39,674 INFO L225 Difference]: With dead ends: 65 [2020-10-29 03:56:39,674 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 03:56:39,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:56:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 03:56:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-29 03:56:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:56:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-29 03:56:39,691 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-29 03:56:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:39,691 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-29 03:56:39,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:56:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-29 03:56:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 03:56:39,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:39,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:39,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:56:39,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 2 times [2020-10-29 03:56:39,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:39,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90484822] [2020-10-29 03:56:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:40,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:40,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:43,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:43,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 03:56:43,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:56:43,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3525 [2020-10-29 03:56:43,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:43,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:43,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:56:43,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:56:43,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:56:43,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:43,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:43,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:43,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:43,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:43,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:56:43,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:43,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:43,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:43,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:43,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:43,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:43,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:43,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:43,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:43,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:43,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:43,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:43,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:43,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:56:43,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90484822] [2020-10-29 03:56:43,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:43,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:56:43,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106262845] [2020-10-29 03:56:43,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:56:43,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:56:43,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:56:43,548 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 14 states. [2020-10-29 03:56:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:44,436 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-29 03:56:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:56:44,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-29 03:56:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:44,438 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:56:44,438 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 03:56:44,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:56:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 03:56:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-10-29 03:56:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:56:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-29 03:56:44,450 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 38 [2020-10-29 03:56:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:44,451 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-29 03:56:44,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:56:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-29 03:56:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 03:56:44,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:44,452 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:44,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:56:44,453 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 5 times [2020-10-29 03:56:44,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:44,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910907747] [2020-10-29 03:56:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:44,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:45,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:45,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 03:56:45,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:56:45,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-10-29 03:56:45,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:45,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:45,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:56:45,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:56:45,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:56:45,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:45,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:45,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:45,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:45,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:45,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:45,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:45,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:45,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:45,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:45,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:45,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:45,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:45,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:45,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:45,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:45,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:45,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:45,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:56:45,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910907747] [2020-10-29 03:56:45,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:45,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:56:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538502221] [2020-10-29 03:56:45,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:56:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:45,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:56:45,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:56:45,658 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 10 states. [2020-10-29 03:56:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:45,995 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2020-10-29 03:56:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:56:45,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-29 03:56:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:45,998 INFO L225 Difference]: With dead ends: 138 [2020-10-29 03:56:45,998 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:56:45,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:56:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:56:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2020-10-29 03:56:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 03:56:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-29 03:56:46,019 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 40 [2020-10-29 03:56:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:46,020 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-29 03:56:46,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:56:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-29 03:56:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:56:46,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:46,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:46,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:56:46,024 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 6 times [2020-10-29 03:56:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:46,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947921335] [2020-10-29 03:56:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:47,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:47,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:47,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:48,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:48,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:48,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:50,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:51,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:51,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:56:51,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 03:56:51,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:56:51,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:51,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:56:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:56:51,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:51,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:51,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:51,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:51,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:51,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:51,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:51,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:51,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:51,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:51,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:51,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:51,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:51,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:51,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:51,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:51,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:51,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:51,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:56:51,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947921335] [2020-10-29 03:56:51,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:51,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:56:51,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143220282] [2020-10-29 03:56:51,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:56:51,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:51,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:56:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:56:51,175 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 10 states. [2020-10-29 03:56:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:51,529 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-29 03:56:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:56:51,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-29 03:56:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:51,530 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:56:51,530 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 03:56:51,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:56:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 03:56:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2020-10-29 03:56:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:56:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-29 03:56:51,546 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 43 [2020-10-29 03:56:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:51,546 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-29 03:56:51,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:56:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-29 03:56:51,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:56:51,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:51,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:51,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:56:51,548 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:51,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 7 times [2020-10-29 03:56:51,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:51,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644885585] [2020-10-29 03:56:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:51,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:51,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:54,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:54,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:54,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:55,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:56,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:56,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:56,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:56:56,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:57,030 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-29 03:56:57,154 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-10-29 03:56:57,487 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-29 03:56:57,765 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-29 03:56:58,047 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-29 03:56:58,331 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-29 03:56:59,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:59,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:59,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:59,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:59,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:59,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:59,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:59,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:59,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:59,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:59,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:59,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:59,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:59,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:59,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:59,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:59,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644885585] [2020-10-29 03:56:59,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:59,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:56:59,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417682124] [2020-10-29 03:56:59,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:56:59,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:56:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:56:59,123 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 26 states. [2020-10-29 03:56:59,993 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-29 03:57:00,483 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-29 03:57:00,711 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-29 03:57:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:01,662 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-29 03:57:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:57:01,662 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-29 03:57:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:01,663 INFO L225 Difference]: With dead ends: 92 [2020-10-29 03:57:01,663 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 03:57:01,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:57:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 03:57:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-10-29 03:57:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 03:57:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-29 03:57:01,680 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 45 [2020-10-29 03:57:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:01,680 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-29 03:57:01,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:57:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-29 03:57:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:57:01,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:01,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-10-29 03:57:01,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:57:01,682 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:01,683 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 3 times [2020-10-29 03:57:01,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:01,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834277915] [2020-10-29 03:57:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:01,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:02,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:02,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:03,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:03,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:05,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:05,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:05,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:06,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:06,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:57:06,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:07,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:07,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:07,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:07,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:07,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:57:07,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:07,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:07,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:07,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:07,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:07,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:07,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:07,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:07,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:07,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:57:07,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834277915] [2020-10-29 03:57:07,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:07,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:57:07,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182090112] [2020-10-29 03:57:07,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:57:07,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:57:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:57:07,061 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 16 states. [2020-10-29 03:57:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:08,034 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-10-29 03:57:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:57:08,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-29 03:57:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:08,036 INFO L225 Difference]: With dead ends: 79 [2020-10-29 03:57:08,036 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 03:57:08,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:57:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 03:57:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-10-29 03:57:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:57:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-29 03:57:08,048 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 45 [2020-10-29 03:57:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:08,049 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-29 03:57:08,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:57:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-29 03:57:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:57:08,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:08,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-10-29 03:57:08,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:57:08,050 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 4 times [2020-10-29 03:57:08,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:08,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651507330] [2020-10-29 03:57:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:08,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:08,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:09,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:09,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:11,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:57:13,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:57:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:13,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:13,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:13,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:13,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:13,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:13,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:13,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:13,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:13,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:13,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:13,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:13,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:57:13,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651507330] [2020-10-29 03:57:13,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:13,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:57:13,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285168472] [2020-10-29 03:57:13,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:57:13,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:57:13,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:57:13,633 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 15 states. [2020-10-29 03:57:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:14,527 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-10-29 03:57:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:57:14,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-29 03:57:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:14,529 INFO L225 Difference]: With dead ends: 82 [2020-10-29 03:57:14,529 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:57:14,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:57:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:57:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-29 03:57:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 03:57:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-29 03:57:14,541 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 45 [2020-10-29 03:57:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:14,541 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-29 03:57:14,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:57:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-29 03:57:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:57:14,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:14,542 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-10-29 03:57:14,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:57:14,543 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash -437163407, now seen corresponding path program 5 times [2020-10-29 03:57:14,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:14,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364894364] [2020-10-29 03:57:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:14,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:15,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:19,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:19,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4731 [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:57:19,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:19,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:19,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:19,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:19,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:19,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:19,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:19,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 03:57:19,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364894364] [2020-10-29 03:57:19,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:19,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:57:19,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806161782] [2020-10-29 03:57:19,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:57:19,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:57:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:57:19,757 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 17 states. [2020-10-29 03:57:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:20,822 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-10-29 03:57:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:57:20,822 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-29 03:57:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:20,824 INFO L225 Difference]: With dead ends: 90 [2020-10-29 03:57:20,824 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:57:20,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:57:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:57:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-29 03:57:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:57:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-29 03:57:20,845 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 45 [2020-10-29 03:57:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:20,846 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-29 03:57:20,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:57:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-29 03:57:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:57:20,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:20,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-29 03:57:20,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:57:20,849 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1987288559, now seen corresponding path program 6 times [2020-10-29 03:57:20,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:20,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004620258] [2020-10-29 03:57:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:21,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:21,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:23,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:23,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:25,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:57:25,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:25,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:26,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:26,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:26,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:26,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:26,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:57:26,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:26,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:26,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:26,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:26,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:26,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:26,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:26,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:26,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:26,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:26,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:26,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:26,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:26,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:26,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:26,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:26,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:26,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:57:26,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004620258] [2020-10-29 03:57:26,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:26,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:57:26,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009197514] [2020-10-29 03:57:26,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:57:26,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:26,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:57:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:57:26,016 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 12 states. [2020-10-29 03:57:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:26,458 INFO L93 Difference]: Finished difference Result 160 states and 184 transitions. [2020-10-29 03:57:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:57:26,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 03:57:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:26,460 INFO L225 Difference]: With dead ends: 160 [2020-10-29 03:57:26,460 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:57:26,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:57:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:57:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2020-10-29 03:57:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:57:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-29 03:57:26,478 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 47 [2020-10-29 03:57:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:26,478 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-29 03:57:26,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:57:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-29 03:57:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:57:26,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:26,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:26,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:57:26,485 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:26,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1003714415, now seen corresponding path program 8 times [2020-10-29 03:57:26,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:26,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839612358] [2020-10-29 03:57:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:26,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:26,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:27,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:27,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:28,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:28,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:30,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:30,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:31,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:31,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:31,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:57:31,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:57:31,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:57:31,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:31,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:31,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:57:31,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:31,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:57:31,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:31,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:31,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:31,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:31,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:31,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:31,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:31,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:31,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:31,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:31,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:31,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:31,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:57:31,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:31,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:31,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:31,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:31,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:31,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:57:31,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839612358] [2020-10-29 03:57:31,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:31,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:57:31,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433584644] [2020-10-29 03:57:31,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:57:31,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:57:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:57:31,657 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 12 states. [2020-10-29 03:57:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:32,173 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-29 03:57:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:57:32,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 03:57:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:32,175 INFO L225 Difference]: With dead ends: 93 [2020-10-29 03:57:32,176 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:57:32,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:57:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:57:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2020-10-29 03:57:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:57:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-29 03:57:32,191 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 47 [2020-10-29 03:57:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:32,191 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-29 03:57:32,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:57:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-29 03:57:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:57:32,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:32,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:57:32,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:57:32,193 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:32,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-29 03:57:32,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:32,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052191308] [2020-10-29 03:57:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:32,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:33,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:34,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:34,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:35,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:36,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:36,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:37,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:57:37,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:38,034 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-29 03:57:38,260 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-29 03:57:38,398 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-29 03:57:39,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:39,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:39,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:39,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:39,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:39,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:39,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:39,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:39,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:39,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:57:39,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:39,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:57:39,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052191308] [2020-10-29 03:57:39,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:39,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:57:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720114551] [2020-10-29 03:57:39,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:57:39,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:39,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:57:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:57:39,676 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 29 states. [2020-10-29 03:57:40,553 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-29 03:57:40,759 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-29 03:57:41,017 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-29 03:57:41,245 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-29 03:57:41,513 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-29 03:57:41,741 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-29 03:57:42,216 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-29 03:57:42,413 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-29 03:57:43,098 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-29 03:57:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:43,451 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-10-29 03:57:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 03:57:43,452 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2020-10-29 03:57:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:43,453 INFO L225 Difference]: With dead ends: 85 [2020-10-29 03:57:43,454 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:57:43,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=278, Invalid=2172, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 03:57:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:57:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-10-29 03:57:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 03:57:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-29 03:57:43,468 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 52 [2020-10-29 03:57:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:43,468 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-29 03:57:43,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:57:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-29 03:57:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:57:43,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:43,469 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-29 03:57:43,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:57:43,470 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 7 times [2020-10-29 03:57:43,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:43,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164839667] [2020-10-29 03:57:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:43,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:44,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:44,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:45,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:45,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:47,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:48,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:48,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:57:48,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:57:48,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:57:48,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:48,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:48,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:57:48,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:48,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:57:48,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:48,939 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-29 03:57:49,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:49,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:49,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:49,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:49,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:49,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:57:49,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:49,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:49,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:49,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:49,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:49,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:49,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:49,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:49,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:49,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:49,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:49,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:49,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:49,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:57:49,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164839667] [2020-10-29 03:57:49,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:49,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:57:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219004794] [2020-10-29 03:57:49,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:57:49,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:57:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:57:49,470 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 18 states. [2020-10-29 03:57:50,016 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-10-29 03:57:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:50,664 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2020-10-29 03:57:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:57:50,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-29 03:57:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:50,666 INFO L225 Difference]: With dead ends: 103 [2020-10-29 03:57:50,666 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 03:57:50,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:57:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 03:57:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-29 03:57:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 03:57:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-10-29 03:57:50,682 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 52 [2020-10-29 03:57:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:50,682 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-10-29 03:57:50,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:57:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-10-29 03:57:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:57:50,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:50,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-29 03:57:50,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:57:50,683 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:50,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 8 times [2020-10-29 03:57:50,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:50,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278744590] [2020-10-29 03:57:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:51,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:53,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:53,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:54,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:54,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:55,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:55,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:57:55,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:56,058 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-29 03:57:56,429 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-29 03:57:56,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:56,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:56,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:56,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:56,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:56,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:56,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:56,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:56,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:56,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:56,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:56,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:56,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:56,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:56,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:56,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:56,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:57:56,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278744590] [2020-10-29 03:57:56,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:56,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:57:56,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616404014] [2020-10-29 03:57:56,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:57:56,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:56,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:57:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:57:56,735 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 19 states. [2020-10-29 03:57:57,591 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-29 03:57:57,855 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-29 03:57:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:58,602 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2020-10-29 03:57:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:57:58,603 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-29 03:57:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:58,604 INFO L225 Difference]: With dead ends: 113 [2020-10-29 03:57:58,605 INFO L226 Difference]: Without dead ends: 106 [2020-10-29 03:57:58,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:57:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-29 03:57:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2020-10-29 03:57:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 03:57:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-10-29 03:57:58,634 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 52 [2020-10-29 03:57:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:58,635 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-10-29 03:57:58,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:57:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-10-29 03:57:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:57:58,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:58,643 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-29 03:57:58,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:57:58,644 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:58,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1689012476, now seen corresponding path program 9 times [2020-10-29 03:57:58,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:58,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073886882] [2020-10-29 03:57:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:58,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:58,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:59,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:59,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:00,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:03,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:03,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:58:03,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:58:03,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:58:03,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:03,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:03,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:58:03,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:58:03,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:58:03,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:04,014 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-29 03:58:04,220 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-29 03:58:04,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:04,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:04,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:04,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:04,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:04,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:58:04,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:04,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:04,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:04,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:04,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:04,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:04,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:04,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:04,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:04,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:04,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:04,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 03:58:04,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073886882] [2020-10-29 03:58:04,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:04,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:58:04,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493943616] [2020-10-29 03:58:04,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:58:04,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:58:04,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:58:04,481 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 20 states. [2020-10-29 03:58:05,064 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-29 03:58:05,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:05,909 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2020-10-29 03:58:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:58:05,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-29 03:58:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:05,911 INFO L225 Difference]: With dead ends: 145 [2020-10-29 03:58:05,912 INFO L226 Difference]: Without dead ends: 138 [2020-10-29 03:58:05,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:58:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-29 03:58:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 87. [2020-10-29 03:58:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 03:58:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-10-29 03:58:05,930 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 52 [2020-10-29 03:58:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:05,931 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-10-29 03:58:05,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:58:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-10-29 03:58:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 03:58:05,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:05,932 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2020-10-29 03:58:05,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:58:05,932 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -843195386, now seen corresponding path program 10 times [2020-10-29 03:58:05,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:05,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588565122] [2020-10-29 03:58:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:05,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:05,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:05,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:07,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:07,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:58:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:10,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:58:10,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:11,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:11,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:11,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:11,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:11,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:58:11,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:11,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:11,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:11,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:11,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:11,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:11,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:11,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:11,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:11,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:11,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:11,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:11,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:11,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:11,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-29 03:58:11,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588565122] [2020-10-29 03:58:11,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:11,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:58:11,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515518326] [2020-10-29 03:58:11,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:58:11,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:58:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:58:11,141 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 14 states. [2020-10-29 03:58:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:11,683 INFO L93 Difference]: Finished difference Result 175 states and 205 transitions. [2020-10-29 03:58:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:58:11,684 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-29 03:58:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:11,686 INFO L225 Difference]: With dead ends: 175 [2020-10-29 03:58:11,686 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 03:58:11,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:58:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 03:58:11,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-29 03:58:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:58:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-29 03:58:11,702 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 54 [2020-10-29 03:58:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:11,702 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-29 03:58:11,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:58:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-29 03:58:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 03:58:11,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:11,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:11,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:58:11,703 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:11,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1988648239, now seen corresponding path program 10 times [2020-10-29 03:58:11,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:11,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901859809] [2020-10-29 03:58:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:11,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:11,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:11,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:12,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:12,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:12,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:12,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:13,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:14,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:15,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:16,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:16,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:16,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:58:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:16,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:16,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:16,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:16,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 03:58:16,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901859809] [2020-10-29 03:58:16,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:16,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:58:16,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428684220] [2020-10-29 03:58:16,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:58:16,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:58:16,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:58:16,905 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-10-29 03:58:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:17,617 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-29 03:58:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:58:17,621 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-29 03:58:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:17,622 INFO L225 Difference]: With dead ends: 93 [2020-10-29 03:58:17,623 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 03:58:17,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:58:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 03:58:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-10-29 03:58:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 03:58:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-29 03:58:17,646 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 57 [2020-10-29 03:58:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:17,646 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-29 03:58:17,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:58:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-29 03:58:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:58:17,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:17,647 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:58:17,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:58:17,647 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:17,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 11 times [2020-10-29 03:58:17,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:17,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443264171] [2020-10-29 03:58:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:17,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:18,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:19,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:19,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:20,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:20,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:22,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:22,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:58:22,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:58:22,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 03:58:22,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:22,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 03:58:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 03:58:22,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:23,430 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-29 03:58:23,587 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-29 03:58:23,875 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-29 03:58:24,069 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-29 03:58:24,314 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-29 03:58:24,516 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-29 03:58:26,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:26,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:26,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:26,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:26,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:26,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:26,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:26,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:26,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:26,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:26,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:26,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:26,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:26,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:26,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:26,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:26,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:26,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:26,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-29 03:58:26,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443264171] [2020-10-29 03:58:26,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:26,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 03:58:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841568998] [2020-10-29 03:58:26,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 03:58:26,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 03:58:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:58:26,537 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 34 states. [2020-10-29 03:58:27,971 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-29 03:58:28,365 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-29 03:58:28,706 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2020-10-29 03:58:29,185 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-29 03:58:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:30,127 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-10-29 03:58:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 03:58:30,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 59 [2020-10-29 03:58:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:30,130 INFO L225 Difference]: With dead ends: 94 [2020-10-29 03:58:30,130 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:58:30,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 03:58:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:58:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-29 03:58:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:58:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-29 03:58:30,147 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 59 [2020-10-29 03:58:30,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:30,147 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-29 03:58:30,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 03:58:30,147 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-29 03:58:30,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:58:30,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:30,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2020-10-29 03:58:30,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:58:30,148 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 11 times [2020-10-29 03:58:30,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:30,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373640719] [2020-10-29 03:58:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:30,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:30,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:30,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:32,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:33,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:33,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:33,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:34,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:34,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:35,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:35,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:58:35,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 03:58:35,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:58:35,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:35,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:58:35,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 03:58:35,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:58:35,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:35,730 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-29 03:58:36,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:36,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:36,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:36,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:36,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:36,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:36,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:36,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:36,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:36,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:36,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:36,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:36,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:36,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:36,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 03:58:36,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373640719] [2020-10-29 03:58:36,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:36,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:58:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591765711] [2020-10-29 03:58:36,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:58:36,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:58:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:58:36,227 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 20 states. [2020-10-29 03:58:36,827 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-29 03:58:37,829 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-29 03:58:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:38,641 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-29 03:58:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:58:38,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-29 03:58:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:38,643 INFO L225 Difference]: With dead ends: 110 [2020-10-29 03:58:38,643 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:58:38,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:58:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:58:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-29 03:58:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 03:58:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-10-29 03:58:38,661 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 59 [2020-10-29 03:58:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:38,661 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-10-29 03:58:38,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:58:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-10-29 03:58:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:58:38,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:38,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2020-10-29 03:58:38,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:58:38,662 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:38,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 12 times [2020-10-29 03:58:38,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:38,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200500710] [2020-10-29 03:58:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:38,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:38,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:38,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:40,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:43,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:43,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:43,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:58:43,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:58:43,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:58:43,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:43,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:58:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:43,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:58:43,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:44,439 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-29 03:58:44,585 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-10-29 03:58:44,729 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-29 03:58:44,939 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-29 03:58:45,085 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-29 03:58:45,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:45,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:45,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:45,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:45,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:45,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:45,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:45,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:45,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:45,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:45,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:45,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:45,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:45,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:45,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:45,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:45,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:58:45,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:45,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:45,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 03:58:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200500710] [2020-10-29 03:58:45,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:45,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:58:45,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633870283] [2020-10-29 03:58:45,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:58:45,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:58:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:58:45,396 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 21 states. [2020-10-29 03:58:45,999 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-29 03:58:47,105 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-29 03:58:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:47,336 INFO L93 Difference]: Finished difference Result 157 states and 188 transitions. [2020-10-29 03:58:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:58:47,337 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-29 03:58:47,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:47,338 INFO L225 Difference]: With dead ends: 157 [2020-10-29 03:58:47,338 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 03:58:47,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:58:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 03:58:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-29 03:58:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 03:58:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2020-10-29 03:58:47,376 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 59 [2020-10-29 03:58:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:47,376 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2020-10-29 03:58:47,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:58:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2020-10-29 03:58:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:58:47,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:47,378 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2020-10-29 03:58:47,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:58:47,379 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 13 times [2020-10-29 03:58:47,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:47,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655127476] [2020-10-29 03:58:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:47,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:48,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:48,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:49,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:50,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:52,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:52,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:52,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:58:52,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:58:52,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:58:52,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:52,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:52,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:58:52,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:58:52,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:58:52,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:52,905 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-29 03:58:53,209 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-29 03:58:53,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:58:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:53,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:53,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:58:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:58:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:58:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 03:58:53,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655127476] [2020-10-29 03:58:53,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:58:53,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:58:53,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283597183] [2020-10-29 03:58:53,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:58:53,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:58:53,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:58:53,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:58:53,676 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand 21 states. [2020-10-29 03:58:54,414 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-29 03:58:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:58:55,105 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2020-10-29 03:58:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:58:55,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-29 03:58:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:58:55,108 INFO L225 Difference]: With dead ends: 180 [2020-10-29 03:58:55,108 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 03:58:55,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:58:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 03:58:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2020-10-29 03:58:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 03:58:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-10-29 03:58:55,141 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 59 [2020-10-29 03:58:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:58:55,142 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-10-29 03:58:55,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:58:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-10-29 03:58:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:58:55,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:58:55,142 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2020-10-29 03:58:55,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:58:55,143 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:58:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:58:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1291630161, now seen corresponding path program 14 times [2020-10-29 03:58:55,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:58:55,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939310456] [2020-10-29 03:58:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:58:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:58:55,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:55,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:56,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:57,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:57,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:58,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:58:58,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:00,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:00,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:59:00,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:59:00,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 03:59:00,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:00,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:59:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:59:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:59:00,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:00,753 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-29 03:59:01,026 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-29 03:59:01,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:01,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:01,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:01,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:01,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:01,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:01,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:01,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-29 03:59:01,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939310456] [2020-10-29 03:59:01,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:01,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:59:01,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728932335] [2020-10-29 03:59:01,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:59:01,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:01,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:59:01,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:59:01,397 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 23 states. [2020-10-29 03:59:02,146 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-29 03:59:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:03,193 INFO L93 Difference]: Finished difference Result 206 states and 245 transitions. [2020-10-29 03:59:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:59:03,194 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-29 03:59:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:03,197 INFO L225 Difference]: With dead ends: 206 [2020-10-29 03:59:03,197 INFO L226 Difference]: Without dead ends: 199 [2020-10-29 03:59:03,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:59:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-29 03:59:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 129. [2020-10-29 03:59:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 03:59:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2020-10-29 03:59:03,229 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 59 [2020-10-29 03:59:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:03,230 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2020-10-29 03:59:03,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:59:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2020-10-29 03:59:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:59:03,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:03,231 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:03,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:59:03,231 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:03,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:03,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 12 times [2020-10-29 03:59:03,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:03,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624337951] [2020-10-29 03:59:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:03,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:07,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4527 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:59:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:07,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:08,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:08,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:59:08,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:08,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:08,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:08,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:08,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:08,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:08,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:08,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 03:59:08,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624337951] [2020-10-29 03:59:08,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:08,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:59:08,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33765712] [2020-10-29 03:59:08,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:59:08,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:08,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:59:08,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:59:08,037 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand 16 states. [2020-10-29 03:59:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:08,808 INFO L93 Difference]: Finished difference Result 296 states and 356 transitions. [2020-10-29 03:59:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:59:08,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-29 03:59:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:08,811 INFO L225 Difference]: With dead ends: 296 [2020-10-29 03:59:08,811 INFO L226 Difference]: Without dead ends: 195 [2020-10-29 03:59:08,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:59:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-29 03:59:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 114. [2020-10-29 03:59:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 03:59:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2020-10-29 03:59:08,842 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 61 [2020-10-29 03:59:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:08,842 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2020-10-29 03:59:08,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:59:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2020-10-29 03:59:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:59:08,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:08,843 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2020-10-29 03:59:08,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:59:08,844 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:08,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1206194957, now seen corresponding path program 15 times [2020-10-29 03:59:08,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:08,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034460918] [2020-10-29 03:59:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:09,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:13,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 03:59:13,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:14,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:14,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:14,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:14,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:14,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:14,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:14,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:14,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:14,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:14,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:14,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:14,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:14,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:14,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:14,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:14,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:14,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 03:59:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034460918] [2020-10-29 03:59:14,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:14,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:59:14,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709046127] [2020-10-29 03:59:14,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:59:14,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:14,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:59:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:59:14,115 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand 16 states. [2020-10-29 03:59:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:15,005 INFO L93 Difference]: Finished difference Result 166 states and 194 transitions. [2020-10-29 03:59:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:59:15,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-29 03:59:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:15,007 INFO L225 Difference]: With dead ends: 166 [2020-10-29 03:59:15,007 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 03:59:15,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:59:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 03:59:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 70. [2020-10-29 03:59:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 03:59:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-29 03:59:15,027 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 61 [2020-10-29 03:59:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:15,027 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-29 03:59:15,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:59:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-29 03:59:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 03:59:15,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:15,028 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:15,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:59:15,028 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 13 times [2020-10-29 03:59:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:15,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790954568] [2020-10-29 03:59:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:15,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:20,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 03:59:20,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:59:20,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5421 [2020-10-29 03:59:20,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:20,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 03:59:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:59:20,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:21,035 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-29 03:59:21,171 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-29 03:59:21,359 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-29 03:59:21,560 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-29 03:59:21,940 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-29 03:59:22,184 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-29 03:59:22,349 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-29 03:59:22,591 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-10-29 03:59:22,849 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2020-10-29 03:59:23,081 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-29 03:59:23,359 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-29 03:59:23,654 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-10-29 03:59:23,866 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-29 03:59:24,062 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-29 03:59:24,240 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-29 03:59:24,815 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 03:59:25,214 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-29 03:59:27,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:27,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:27,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:27,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:27,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:27,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:27,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:27,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:27,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:27,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:27,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:27,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:27,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:27,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:27,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:27,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-29 03:59:27,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790954568] [2020-10-29 03:59:27,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:27,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 03:59:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017774212] [2020-10-29 03:59:27,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 03:59:27,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 03:59:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:59:27,585 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 41 states. [2020-10-29 03:59:28,221 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-10-29 03:59:28,635 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-29 03:59:29,339 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-29 03:59:29,910 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-29 03:59:30,386 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 58 [2020-10-29 03:59:30,878 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 03:59:31,276 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 03:59:31,464 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-29 03:59:31,676 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 03:59:32,025 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-29 03:59:32,371 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2020-10-29 03:59:32,575 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-29 03:59:32,936 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-29 03:59:33,306 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-29 03:59:33,519 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-29 03:59:33,812 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 03:59:34,188 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-10-29 03:59:34,467 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-29 03:59:35,066 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-29 03:59:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:36,084 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2020-10-29 03:59:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 03:59:36,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2020-10-29 03:59:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:36,086 INFO L225 Difference]: With dead ends: 127 [2020-10-29 03:59:36,086 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 03:59:36,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=523, Invalid=4879, Unknown=0, NotChecked=0, Total=5402 [2020-10-29 03:59:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 03:59:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2020-10-29 03:59:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 03:59:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-29 03:59:36,112 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 66 [2020-10-29 03:59:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:36,113 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-29 03:59:36,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 03:59:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-29 03:59:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 03:59:36,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:36,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2020-10-29 03:59:36,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:59:36,114 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:36,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:36,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1936361116, now seen corresponding path program 16 times [2020-10-29 03:59:36,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:36,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802334955] [2020-10-29 03:59:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:37,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:41,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:59:41,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:41,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:41,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:41,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:41,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:41,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:59:41,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:41,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:41,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:41,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:41,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:41,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:41,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:41,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:41,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:41,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:41,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:41,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:41,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:41,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-29 03:59:41,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802334955] [2020-10-29 03:59:41,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:41,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:59:41,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210770768] [2020-10-29 03:59:41,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:59:41,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:59:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:59:41,660 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 15 states. [2020-10-29 03:59:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:42,865 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2020-10-29 03:59:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:59:42,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-29 03:59:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:42,867 INFO L225 Difference]: With dead ends: 134 [2020-10-29 03:59:42,867 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 03:59:42,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:59:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 03:59:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2020-10-29 03:59:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 03:59:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-10-29 03:59:42,896 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 66 [2020-10-29 03:59:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:42,896 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-10-29 03:59:42,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:59:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-10-29 03:59:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 03:59:42,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:42,897 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2020-10-29 03:59:42,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:59:42,897 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:42,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1034442400, now seen corresponding path program 17 times [2020-10-29 03:59:42,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:42,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314770069] [2020-10-29 03:59:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:42,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:47,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:47,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:47,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:59:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:48,334 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-29 03:59:48,586 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2020-10-29 03:59:49,060 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-29 03:59:49,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:49,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:49,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:49,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:49,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:59:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:49,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:49,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:49,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:49,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:59:49,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:49,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:49,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 53 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 03:59:49,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314770069] [2020-10-29 03:59:49,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:49,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:59:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113109578] [2020-10-29 03:59:49,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:59:49,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:59:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:59:49,842 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 25 states.