/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/ms2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:54:15,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:54:15,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:54:15,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:54:15,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:54:15,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:54:15,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:54:15,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:54:15,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:54:15,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:54:15,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:54:15,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:54:15,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:54:15,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:54:15,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:54:15,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:54:15,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:54:15,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:54:15,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:54:15,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:54:16,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:54:16,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:54:16,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:54:16,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:54:16,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:54:16,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:54:16,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:54:16,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:54:16,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:54:16,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:54:16,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:54:16,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:54:16,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:54:16,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:54:16,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:54:16,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:54:16,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:54:16,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:54:16,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:54:16,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:54:16,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:54:16,044 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 03:54:16,076 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:54:16,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:54:16,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:54:16,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:54:16,079 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:54:16,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:54:16,079 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:54:16,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:54:16,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:54:16,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:54:16,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:54:16,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:54:16,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:54:16,080 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:54:16,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:54:16,081 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:54:16,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:54:16,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:54:16,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:54:16,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:54:16,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:54:16,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:54:16,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:54:16,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:54:16,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:54:16,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:54:16,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:54:16,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:54:16,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:54:16,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:54:16,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:54:16,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:54:16,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:54:16,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:54:16,590 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:54:16,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2.c [2020-10-29 03:54:16,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27f98273e/2e4038fecd98403c97463ebb143fd9c4/FLAGa02d9199e [2020-10-29 03:54:17,435 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:54:17,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms2.c [2020-10-29 03:54:17,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27f98273e/2e4038fecd98403c97463ebb143fd9c4/FLAGa02d9199e [2020-10-29 03:54:17,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27f98273e/2e4038fecd98403c97463ebb143fd9c4 [2020-10-29 03:54:17,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:54:17,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:54:17,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:54:17,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:54:17,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:54:17,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:54:17" (1/1) ... [2020-10-29 03:54:17,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3470b7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:17, skipping insertion in model container [2020-10-29 03:54:17,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:54:17" (1/1) ... [2020-10-29 03:54:17,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:54:17,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:54:18,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:54:18,031 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:54:18,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:54:18,073 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:54:18,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18 WrapperNode [2020-10-29 03:54:18,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:54:18,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:54:18,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:54:18,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:54:18,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (1/1) ... [2020-10-29 03:54:18,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (1/1) ... [2020-10-29 03:54:18,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (1/1) ... [2020-10-29 03:54:18,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (1/1) ... [2020-10-29 03:54:18,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (1/1) ... [2020-10-29 03:54:18,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (1/1) ... [2020-10-29 03:54:18,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (1/1) ... [2020-10-29 03:54:18,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:54:18,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:54:18,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:54:18,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:54:18,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (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 03:54:18,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:54:18,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:54:18,198 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:54:18,198 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:54:18,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:54:18,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:54:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:54:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:54:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:54:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:54:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:54:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:54:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:54:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:54:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:54:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:54:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:54:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:54:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:54:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:54:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:54:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:54:18,588 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:54:18,589 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 03:54:18,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:54:18 BoogieIcfgContainer [2020-10-29 03:54:18,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:54:18,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:54:18,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:54:18,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:54:18,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:54:17" (1/3) ... [2020-10-29 03:54:18,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c533c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:54:18, skipping insertion in model container [2020-10-29 03:54:18,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:54:18" (2/3) ... [2020-10-29 03:54:18,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c533c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:54:18, skipping insertion in model container [2020-10-29 03:54:18,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:54:18" (3/3) ... [2020-10-29 03:54:18,603 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2.c [2020-10-29 03:54:18,617 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:54:18,622 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:54:18,638 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:54:18,687 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:54:18,687 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:54:18,687 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:54:18,688 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:54:18,688 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:54:18,688 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:54:18,688 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:54:18,688 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:54:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-29 03:54:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 03:54:18,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:18,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:18,752 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-29 03:54:18,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:18,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059865757] [2020-10-29 03:54:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:19,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:54:19,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:54:19,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-29 03:54:19,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:19,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:54:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:54:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 03:54:19,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:54:19,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:19,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:54:19,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:19,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:19,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:19,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:19,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:19,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:19,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:54:19,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 03:54:19,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:19,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:19,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:54:19,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:19,705 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 03:54:19,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059865757] [2020-10-29 03:54:19,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:54:19,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:54:19,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450166271] [2020-10-29 03:54:19,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:54:19,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:19,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:54:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:54:19,733 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-29 03:54:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:19,944 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-29 03:54:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:54:19,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 03:54:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:19,955 INFO L225 Difference]: With dead ends: 65 [2020-10-29 03:54:19,955 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 03:54:19,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:54:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 03:54:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 03:54:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 03:54:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-29 03:54:20,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-29 03:54:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:20,005 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-29 03:54:20,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:54:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-29 03:54:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:54:20,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:20,007 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, 1, 1, 1] [2020-10-29 03:54:20,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:54:20,007 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:20,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-29 03:54:20,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:20,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980609104] [2020-10-29 03:54:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:20,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:20,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:20,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:20,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 03:54:20,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:54:20,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-29 03:54:20,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:20,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:54:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:54:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 03:54:20,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:20,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:21,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:21,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:21,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:21,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:21,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:54:21,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:21,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:21,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:21,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:21,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:21,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:21,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:21,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:21,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:21,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:21,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:54:21,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:21,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:54:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:21,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:54:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980609104] [2020-10-29 03:54:21,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:54:21,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 03:54:21,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190508779] [2020-10-29 03:54:21,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:54:21,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:21,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:54:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:54:21,034 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-29 03:54:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:21,314 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-29 03:54:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 03:54:21,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-29 03:54:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:21,316 INFO L225 Difference]: With dead ends: 38 [2020-10-29 03:54:21,316 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 03:54:21,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:54:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 03:54:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-29 03:54:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 03:54:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-29 03:54:21,326 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-29 03:54:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:21,327 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-29 03:54:21,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:54:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-29 03:54:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:54:21,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:21,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:21,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:54:21,329 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-29 03:54:21,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:21,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920167582] [2020-10-29 03:54:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:21,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:21,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:22,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:22,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 03:54:22,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:54:22,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-29 03:54:22,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:22,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:54:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:54:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 03:54:22,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:22,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:22,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:22,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:22,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:22,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:22,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 03:54:22,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:22,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:22,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:22,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:22,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:22,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:22,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:22,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:22,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:22,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:22,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:54:22,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:22,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:54:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:22,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:22,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920167582] [2020-10-29 03:54:22,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:22,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:54:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229549447] [2020-10-29 03:54:22,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:54:22,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:54:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:54:22,478 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-29 03:54:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:22,816 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-29 03:54:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:54:22,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 03:54:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:22,818 INFO L225 Difference]: With dead ends: 56 [2020-10-29 03:54:22,818 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 03:54:22,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:54:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 03:54:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-29 03:54:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 03:54:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-29 03:54:22,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-29 03:54:22,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:22,837 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-29 03:54:22,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:54:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-29 03:54:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 03:54:22,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:22,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:22,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:54:22,839 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1079019474, now seen corresponding path program 1 times [2020-10-29 03:54:22,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:22,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47908777] [2020-10-29 03:54:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:22,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:23,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:23,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:27,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:27,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 03:54:27,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:54:27,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4475 [2020-10-29 03:54:27,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:27,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:54:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:54:27,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:54:27,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:27,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:27,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:27,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:27,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:54:27,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:27,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:27,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:27,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:27,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:27,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:27,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:27,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:27,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:54:27,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:27,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:27,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:27,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:27,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:27,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:27,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47908777] [2020-10-29 03:54:27,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:27,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:54:27,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477975705] [2020-10-29 03:54:27,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:54:27,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:27,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:54:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:54:27,674 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-29 03:54:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:28,275 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-29 03:54:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:54:28,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 03:54:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:28,279 INFO L225 Difference]: With dead ends: 54 [2020-10-29 03:54:28,279 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 03:54:28,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:54:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 03:54:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-29 03:54:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 03:54:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-29 03:54:28,298 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-10-29 03:54:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:28,298 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-29 03:54:28,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:54:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-29 03:54:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 03:54:28,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:28,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:28,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:54:28,304 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 2 times [2020-10-29 03:54:28,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:28,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759915999] [2020-10-29 03:54:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:28,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:28,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:30,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:31,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:33,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:54:33,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:54:33,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:54:33,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:33,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:33,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:54:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:54:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:54:33,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:54:33,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:33,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:33,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:33,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:33,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:54:33,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:33,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:33,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:33,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:33,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:33,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:33,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:33,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:54:33,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:33,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:54:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:54:33,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:54:33,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759915999] [2020-10-29 03:54:33,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:33,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:54:33,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323122411] [2020-10-29 03:54:33,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:54:33,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:33,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:54:33,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:54:33,615 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-29 03:54:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:34,103 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-29 03:54:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:54:34,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 03:54:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:34,105 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:54:34,105 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 03:54:34,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:54:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 03:54:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-29 03:54:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 03:54:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-29 03:54:34,113 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-29 03:54:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:34,114 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-29 03:54:34,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:54:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-29 03:54:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:54:34,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:34,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:34,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:54:34,116 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash -639202741, now seen corresponding path program 3 times [2020-10-29 03:54:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:34,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842168533] [2020-10-29 03:54:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:34,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:34,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:34,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:38,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:38,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:54:38,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:54:38,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4291 [2020-10-29 03:54:38,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:38,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:38,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:54:38,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:38,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:54:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:38,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:38,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:38,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:38,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:38,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:38,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:54:38,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:38,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:38,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:38,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:38,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:38,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:38,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:38,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:38,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:38,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:38,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:38,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:38,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:38,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:38,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:38,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:38,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:38,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:38,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842168533] [2020-10-29 03:54:38,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:38,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:54:38,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574906338] [2020-10-29 03:54:38,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:54:38,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:54:38,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:54:38,835 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-10-29 03:54:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:39,716 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-29 03:54:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:54:39,717 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 03:54:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:39,720 INFO L225 Difference]: With dead ends: 64 [2020-10-29 03:54:39,720 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 03:54:39,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:54:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 03:54:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-29 03:54:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:54:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-29 03:54:39,732 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 37 [2020-10-29 03:54:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:39,733 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-29 03:54:39,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:54:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-29 03:54:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:54:39,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:39,734 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:39,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:54:39,735 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:39,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1180593811, now seen corresponding path program 4 times [2020-10-29 03:54:39,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:39,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27541269] [2020-10-29 03:54:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:40,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:40,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:41,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:42,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:42,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:43,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:44,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:54:44,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:54:44,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4437 [2020-10-29 03:54:44,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:44,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:54:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:44,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:54:44,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:44,563 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 27 [2020-10-29 03:54:44,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:44,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:44,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:44,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:44,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:54:44,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:44,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:44,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:44,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:44,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:44,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:54:44,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:44,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:44,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:44,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:44,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:44,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:44,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:44,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:44,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:44,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:44,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:44,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:44,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27541269] [2020-10-29 03:54:44,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:44,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:54:44,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158485834] [2020-10-29 03:54:44,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:54:44,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:44,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:54:44,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:54:44,988 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 17 states. [2020-10-29 03:54:45,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:45,788 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-29 03:54:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:54:45,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-29 03:54:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:45,791 INFO L225 Difference]: With dead ends: 66 [2020-10-29 03:54:45,791 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:54:45,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:54:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:54:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2020-10-29 03:54:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 03:54:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-29 03:54:45,802 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 39 [2020-10-29 03:54:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:45,802 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-29 03:54:45,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:54:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-29 03:54:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 03:54:45,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:45,804 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:45,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:54:45,804 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 5 times [2020-10-29 03:54:45,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:45,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299956497] [2020-10-29 03:54:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:45,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:46,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:47,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:50,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:50,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 03:54:50,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:54:50,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:54:50,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:50,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:54:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:54:50,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:51,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:51,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:51,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:51,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:51,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:54:51,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:51,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:51,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:51,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:51,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:51,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:51,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:51,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:51,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:51,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:51,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:54:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:54:51,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299956497] [2020-10-29 03:54:51,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:51,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:54:51,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904024201] [2020-10-29 03:54:51,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:54:51,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:54:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:54:51,040 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 14 states. [2020-10-29 03:54:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:51,628 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-29 03:54:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:54:51,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-29 03:54:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:51,630 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:54:51,630 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:54:51,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:54:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:54:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-29 03:54:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 03:54:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-29 03:54:51,644 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-29 03:54:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:51,645 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-29 03:54:51,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:54:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-29 03:54:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 03:54:51,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:51,650 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:51,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:54:51,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 6 times [2020-10-29 03:54:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:51,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763055545] [2020-10-29 03:54:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:51,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:52,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:52,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:53,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:54,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:56,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:56,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:54:56,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:57,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:57,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:57,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:57,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:57,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:54:57,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:57,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:57,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:57,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:57,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:57,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:57,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:57,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:54:57,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:57,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:57,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:57,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763055545] [2020-10-29 03:54:57,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:57,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:54:57,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895904740] [2020-10-29 03:54:57,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:54:57,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:54:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:54:57,596 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 20 states. [2020-10-29 03:54:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:54:58,760 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-10-29 03:54:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:54:58,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-29 03:54:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:54:58,763 INFO L225 Difference]: With dead ends: 72 [2020-10-29 03:54:58,763 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 03:54:58,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:54:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 03:54:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-29 03:54:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 03:54:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-29 03:54:58,780 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 42 [2020-10-29 03:54:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:54:58,780 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-29 03:54:58,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:54:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-29 03:54:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 03:54:58,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:54:58,784 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:54:58,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:54:58,785 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:54:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:54:58,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1133390632, now seen corresponding path program 7 times [2020-10-29 03:54:58,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:54:58,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319085035] [2020-10-29 03:54:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:54:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:58,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:58,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:59,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:00,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:02,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:03,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:03,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 03:55:03,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:55:03,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:55:03,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:03,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:03,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:55:03,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:03,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:55:03,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:04,262 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2020-10-29 03:55:04,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:04,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:04,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:04,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:04,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:04,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:04,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:04,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:04,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:04,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:04,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319085035] [2020-10-29 03:55:04,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:04,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:55:04,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878580259] [2020-10-29 03:55:04,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:55:04,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:55:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:55:04,873 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 21 states. [2020-10-29 03:55:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:06,771 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-29 03:55:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:55:06,772 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-29 03:55:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:06,774 INFO L225 Difference]: With dead ends: 94 [2020-10-29 03:55:06,774 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:55:06,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 03:55:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:55:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2020-10-29 03:55:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 03:55:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-29 03:55:06,794 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 44 [2020-10-29 03:55:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:06,795 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-29 03:55:06,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:55:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-29 03:55:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:55:06,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:06,796 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:06,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:55:06,796 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 8 times [2020-10-29 03:55:06,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:06,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407682167] [2020-10-29 03:55:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:06,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:06,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:07,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:08,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:09,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:11,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:11,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:55:11,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:55:11,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:55:11,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:11,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:11,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:55:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:55:11,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:55:11,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:12,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:12,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:12,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:12,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:12,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:12,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:12,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:12,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:12,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:12,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:12,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:12,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:12,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:12,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:12,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:12,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:12,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:55:12,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:12,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:55:12,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:55:12,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407682167] [2020-10-29 03:55:12,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:12,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:55:12,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917012499] [2020-10-29 03:55:12,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:55:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:55:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:55:12,245 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 19 states. [2020-10-29 03:55:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:13,201 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-10-29 03:55:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:55:13,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-29 03:55:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:13,203 INFO L225 Difference]: With dead ends: 102 [2020-10-29 03:55:13,203 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:55:13,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=1211, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 03:55:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:55:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-29 03:55:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 03:55:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-29 03:55:13,218 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 45 [2020-10-29 03:55:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:13,218 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-29 03:55:13,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:55:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-29 03:55:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 03:55:13,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:13,220 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:13,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:55:13,220 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1066744262, now seen corresponding path program 9 times [2020-10-29 03:55:13,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:13,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942597498] [2020-10-29 03:55:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:13,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:13,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:13,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:14,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:14,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:15,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:16,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:18,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:18,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 03:55:18,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:55:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:55:18,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:18,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:55:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:55:18,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:18,816 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 27 [2020-10-29 03:55:19,004 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 40 [2020-10-29 03:55:19,449 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-29 03:55:19,683 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-29 03:55:19,832 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2020-10-29 03:55:20,015 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-29 03:55:20,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:20,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:20,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:20,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:20,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:55:20,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:20,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:20,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:20,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:20,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:20,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:20,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:20,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:20,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:20,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:20,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:20,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:20,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:20,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:20,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:20,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942597498] [2020-10-29 03:55:20,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:20,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:55:20,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809890511] [2020-10-29 03:55:20,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:55:20,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:20,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:55:20,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:55:20,449 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 22 states. [2020-10-29 03:55:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:21,712 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2020-10-29 03:55:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:55:21,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-29 03:55:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:21,714 INFO L225 Difference]: With dead ends: 105 [2020-10-29 03:55:21,715 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 03:55:21,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:55:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 03:55:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2020-10-29 03:55:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:55:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-29 03:55:21,726 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 46 [2020-10-29 03:55:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:21,727 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-29 03:55:21,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:55:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-29 03:55:21,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:55:21,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:21,728 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:21,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:55:21,728 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1091709585, now seen corresponding path program 10 times [2020-10-29 03:55:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:21,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771333251] [2020-10-29 03:55:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:21,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:22,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:23,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:24,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:25,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:26,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:26,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:55:26,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:55:26,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:55:26,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:26,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:26,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:55:26,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:26,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:55:26,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:27,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:27,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:27,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:27,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:27,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:27,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:55:27,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:27,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:27,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:27,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:27,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:27,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:27,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:27,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:27,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:27,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:27,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:27,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:27,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:27,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:27,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771333251] [2020-10-29 03:55:27,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:27,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:55:27,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418920360] [2020-10-29 03:55:27,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:55:27,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:27,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:55:27,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:55:27,958 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-10-29 03:55:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:29,445 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-10-29 03:55:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:55:29,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-10-29 03:55:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:29,447 INFO L225 Difference]: With dead ends: 80 [2020-10-29 03:55:29,447 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 03:55:29,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:55:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 03:55:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-29 03:55:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 03:55:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-29 03:55:29,461 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2020-10-29 03:55:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:29,461 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-29 03:55:29,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:55:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-29 03:55:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:55:29,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:29,462 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:29,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:55:29,463 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2016139793, now seen corresponding path program 11 times [2020-10-29 03:55:29,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:29,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798309306] [2020-10-29 03:55:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:29,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:30,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:31,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:31,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:55:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:55:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:34,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:34,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:34,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:55:34,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:34,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:34,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:34,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:34,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:34,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:34,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:34,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:34,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:34,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:34,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:34,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:34,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798309306] [2020-10-29 03:55:34,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:34,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:55:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523518461] [2020-10-29 03:55:34,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:55:34,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:55:34,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:55:34,684 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 16 states. [2020-10-29 03:55:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:35,371 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-29 03:55:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:55:35,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-29 03:55:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:35,373 INFO L225 Difference]: With dead ends: 111 [2020-10-29 03:55:35,374 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 03:55:35,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:55:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 03:55:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2020-10-29 03:55:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 03:55:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-29 03:55:35,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2020-10-29 03:55:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:35,385 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-29 03:55:35,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:55:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-29 03:55:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 03:55:35,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:35,386 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:35,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:55:35,387 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:35,387 INFO L82 PathProgramCache]: Analyzing trace with hash -527027768, now seen corresponding path program 12 times [2020-10-29 03:55:35,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:35,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332622043] [2020-10-29 03:55:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:35,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:36,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:36,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:36,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:37,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:37,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:38,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:39,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:40,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:55:40,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:40,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:40,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:40,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:40,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:40,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:40,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:55:40,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:40,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:40,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:40,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:40,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:40,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:55:40,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:40,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:40,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:40,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:40,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:40,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:40,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:55:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:40,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332622043] [2020-10-29 03:55:40,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:40,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:55:40,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828763721] [2020-10-29 03:55:40,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:55:40,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:40,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:55:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:55:40,628 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 16 states. [2020-10-29 03:55:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:41,054 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-29 03:55:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:55:41,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-29 03:55:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:41,056 INFO L225 Difference]: With dead ends: 83 [2020-10-29 03:55:41,057 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 03:55:41,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:55:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 03:55:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-29 03:55:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:55:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-29 03:55:41,072 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-29 03:55:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:41,072 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-29 03:55:41,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:55:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-29 03:55:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:55:41,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:41,076 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:41,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:55:41,077 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1196207642, now seen corresponding path program 13 times [2020-10-29 03:55:41,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:41,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839072472] [2020-10-29 03:55:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:41,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:41,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:41,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:42,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:43,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:43,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:46,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:55:46,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:46,777 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 36 [2020-10-29 03:55:47,057 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 40 [2020-10-29 03:55:47,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:47,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:47,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:47,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:47,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:55:47,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:47,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:47,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:47,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:47,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:47,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:47,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839072472] [2020-10-29 03:55:48,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:48,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:55:48,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798204095] [2020-10-29 03:55:48,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:55:48,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:48,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:55:48,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:55:48,007 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 28 states. [2020-10-29 03:55:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:50,275 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-29 03:55:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:55:50,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2020-10-29 03:55:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:50,277 INFO L225 Difference]: With dead ends: 88 [2020-10-29 03:55:50,277 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 03:55:50,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=128, Invalid=1594, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 03:55:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 03:55:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2020-10-29 03:55:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 03:55:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-29 03:55:50,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 52 [2020-10-29 03:55:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:50,290 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-29 03:55:50,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:55:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-29 03:55:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 03:55:50,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:50,291 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:55:50,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:55:50,292 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -32972156, now seen corresponding path program 14 times [2020-10-29 03:55:50,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:50,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301376736] [2020-10-29 03:55:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:50,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:50,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:51,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:53,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:55,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:55:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:55,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:55:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:55,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:55,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:55:55,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:55,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:55:55,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:55,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:55,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:55,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:55:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:55,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:55,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:55:55,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:55:55,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:55:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:55:55,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:55:55,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:55:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:55:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:55:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:55:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:55:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:55:55,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301376736] [2020-10-29 03:55:55,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:55:55,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:55:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576288079] [2020-10-29 03:55:55,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:55:55,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:55:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:55:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:55:55,552 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 18 states. [2020-10-29 03:55:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:55:56,323 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-29 03:55:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:55:56,324 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-29 03:55:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:55:56,325 INFO L225 Difference]: With dead ends: 85 [2020-10-29 03:55:56,325 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:55:56,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:55:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:55:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2020-10-29 03:55:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:55:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-29 03:55:56,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2020-10-29 03:55:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:55:56,341 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-29 03:55:56,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:55:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-29 03:55:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:55:56,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:55:56,342 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-29 03:55:56,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:55:56,342 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:55:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:55:56,343 INFO L82 PathProgramCache]: Analyzing trace with hash 222645745, now seen corresponding path program 15 times [2020-10-29 03:55:56,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:55:56,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30581761] [2020-10-29 03:55:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:55:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:55:56,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:56,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:57,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:57,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:57,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:57,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:58,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:59,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:59,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:55:59,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:01,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:56:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:01,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:01,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:01,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:01,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:01,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:01,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:01,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:01,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:01,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:01,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:01,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:01,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:01,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30581761] [2020-10-29 03:56:01,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:01,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:56:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197221449] [2020-10-29 03:56:01,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:56:01,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:56:01,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:56:01,587 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 18 states. [2020-10-29 03:56:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:02,023 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-29 03:56:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:56:02,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-29 03:56:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:02,024 INFO L225 Difference]: With dead ends: 91 [2020-10-29 03:56:02,024 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 03:56:02,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:56:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 03:56:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-29 03:56:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 03:56:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-29 03:56:02,040 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-29 03:56:02,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:02,041 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-29 03:56:02,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:56:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-29 03:56:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 03:56:02,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:02,043 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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 03:56:02,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:56:02,044 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:02,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1920102253, now seen corresponding path program 16 times [2020-10-29 03:56:02,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:02,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615440413] [2020-10-29 03:56:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:02,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:02,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:06,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:06,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:07,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:07,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 03:56:07,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:56:07,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:56:07,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:07,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:07,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:56:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 03:56:07,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:07,860 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2020-10-29 03:56:08,135 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2020-10-29 03:56:08,462 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 43 [2020-10-29 03:56:09,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:09,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:09,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:09,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:09,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:09,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:09,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:09,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:09,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:09,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:09,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:09,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:09,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:09,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:09,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:09,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:09,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:09,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:09,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:09,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:09,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615440413] [2020-10-29 03:56:09,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:09,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:56:09,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601456710] [2020-10-29 03:56:09,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:56:09,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:09,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:56:09,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:56:09,725 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 32 states. [2020-10-29 03:56:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:12,590 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-29 03:56:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 03:56:12,591 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 57 [2020-10-29 03:56:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:12,593 INFO L225 Difference]: With dead ends: 96 [2020-10-29 03:56:12,593 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 03:56:12,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 03:56:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 03:56:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-29 03:56:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 03:56:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-29 03:56:12,608 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 57 [2020-10-29 03:56:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:12,608 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-29 03:56:12,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:56:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-29 03:56:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:56:12,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:12,609 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 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 03:56:12,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:56:12,609 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash 483373749, now seen corresponding path program 17 times [2020-10-29 03:56:12,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:12,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790166524] [2020-10-29 03:56:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:12,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:13,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:16,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:56:17,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:56:17,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:17,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:17,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:17,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:17,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:17,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:17,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:17,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:17,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:17,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:17,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:17,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:17,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:17,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:17,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:17,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790166524] [2020-10-29 03:56:17,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:17,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:56:17,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228182185] [2020-10-29 03:56:17,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:56:17,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:17,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:56:17,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:56:17,988 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 20 states. [2020-10-29 03:56:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:18,886 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-29 03:56:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:56:18,887 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-29 03:56:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:18,888 INFO L225 Difference]: With dead ends: 93 [2020-10-29 03:56:18,888 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 03:56:18,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:56:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 03:56:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-29 03:56:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 03:56:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-29 03:56:18,905 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2020-10-29 03:56:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:18,906 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-29 03:56:18,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:56:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-29 03:56:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 03:56:18,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:18,907 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:56:18,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:56:18,907 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -290917340, now seen corresponding path program 18 times [2020-10-29 03:56:18,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:18,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082652481] [2020-10-29 03:56:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:18,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:19,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:19,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:19,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:19,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:20,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:23,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:23,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 03:56:23,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:56:23,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:56:23,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:23,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:56:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:56:23,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:24,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:24,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:24,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:24,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:24,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:24,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:24,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:24,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:24,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:24,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082652481] [2020-10-29 03:56:24,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:24,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:56:24,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189948279] [2020-10-29 03:56:24,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:56:24,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:24,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:56:24,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:56:24,210 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2020-10-29 03:56:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:24,721 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-29 03:56:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:56:24,721 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-29 03:56:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:24,722 INFO L225 Difference]: With dead ends: 99 [2020-10-29 03:56:24,722 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 03:56:24,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:56:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 03:56:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-29 03:56:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 03:56:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-29 03:56:24,737 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-29 03:56:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:24,738 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-29 03:56:24,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:56:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-29 03:56:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 03:56:24,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:24,739 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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 03:56:24,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:56:24,739 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:24,739 INFO L82 PathProgramCache]: Analyzing trace with hash 262866626, now seen corresponding path program 19 times [2020-10-29 03:56:24,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:24,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627722333] [2020-10-29 03:56:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:24,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:26,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:28,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:29,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:29,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:56:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:30,202 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2020-10-29 03:56:30,634 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-10-29 03:56:30,797 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2020-10-29 03:56:30,953 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2020-10-29 03:56:31,259 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 46 [2020-10-29 03:56:31,584 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-29 03:56:33,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:33,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:33,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:33,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:33,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:33,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:33,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:33,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:33,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:33,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:33,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:33,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627722333] [2020-10-29 03:56:33,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:33,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 03:56:33,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215033584] [2020-10-29 03:56:33,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 03:56:33,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 03:56:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1182, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:56:33,392 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 36 states. [2020-10-29 03:56:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:37,142 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-29 03:56:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 03:56:37,145 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 62 [2020-10-29 03:56:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:37,146 INFO L225 Difference]: With dead ends: 104 [2020-10-29 03:56:37,146 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 03:56:37,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=162, Invalid=2700, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 03:56:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 03:56:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-29 03:56:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 03:56:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-29 03:56:37,161 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 62 [2020-10-29 03:56:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:37,161 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-29 03:56:37,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 03:56:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-29 03:56:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 03:56:37,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:37,162 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 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 03:56:37,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:56:37,163 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash -126686752, now seen corresponding path program 20 times [2020-10-29 03:56:37,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:37,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841320979] [2020-10-29 03:56:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:37,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:37,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:38,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:39,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:41,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:42,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:56:42,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:42,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:42,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:42,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:42,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:42,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:42,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:42,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:42,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:42,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:42,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:42,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:42,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:42,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:42,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:42,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:42,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:42,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841320979] [2020-10-29 03:56:42,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:42,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:56:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085420097] [2020-10-29 03:56:42,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:56:42,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:42,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:56:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:56:42,498 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 22 states. [2020-10-29 03:56:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:43,700 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-29 03:56:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:56:43,701 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-10-29 03:56:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:43,703 INFO L225 Difference]: With dead ends: 101 [2020-10-29 03:56:43,703 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 03:56:43,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:56:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 03:56:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2020-10-29 03:56:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 03:56:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-29 03:56:43,718 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2020-10-29 03:56:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:43,718 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-29 03:56:43,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:56:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-29 03:56:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:56:43,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:43,719 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 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 03:56:43,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:56:43,719 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1859839083, now seen corresponding path program 21 times [2020-10-29 03:56:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:43,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635435880] [2020-10-29 03:56:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:43,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:44,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:45,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:46,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:48,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:48,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 03:56:48,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:56:48,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:56:48,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:48,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:48,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:56:48,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:48,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:56:48,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:49,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:49,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:49,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:49,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:49,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:49,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:49,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:49,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:49,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:56:49,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:49,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:49,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:49,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:49,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:49,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635435880] [2020-10-29 03:56:49,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:49,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:56:49,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930068403] [2020-10-29 03:56:49,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:56:49,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:56:49,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:56:49,057 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-10-29 03:56:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:56:49,633 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-10-29 03:56:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:56:49,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-29 03:56:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:56:49,636 INFO L225 Difference]: With dead ends: 107 [2020-10-29 03:56:49,636 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:56:49,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:56:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:56:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-29 03:56:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:56:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-29 03:56:49,649 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-10-29 03:56:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:56:49,650 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-29 03:56:49,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:56:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-29 03:56:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 03:56:49,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:56:49,650 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 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 03:56:49,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:56:49,651 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:56:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:56:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2042889289, now seen corresponding path program 22 times [2020-10-29 03:56:49,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:56:49,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665249180] [2020-10-29 03:56:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:56:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:50,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:53,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:54,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:54,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 03:56:54,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:56:54,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-29 03:56:54,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:54,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:54,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 03:56:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:56:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:56:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:55,866 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-29 03:56:56,321 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-10-29 03:56:56,514 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-10-29 03:56:56,683 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-29 03:56:56,888 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2020-10-29 03:56:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:56:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:59,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:59,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:59,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:56:59,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:59,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:56:59,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:59,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:59,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:56:59,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:56:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:56:59,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:56:59,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:56:59,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:56:59,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:56:59,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:56:59,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:56:59,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:56:59,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:56:59,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:56:59,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:56:59,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:56:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:56:59,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665249180] [2020-10-29 03:56:59,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:56:59,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 03:56:59,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030518826] [2020-10-29 03:56:59,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 03:56:59,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:56:59,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 03:56:59,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1474, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 03:56:59,452 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 40 states. [2020-10-29 03:57:01,010 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 03:57:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:05,208 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-29 03:57:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 03:57:05,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 67 [2020-10-29 03:57:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:05,209 INFO L225 Difference]: With dead ends: 112 [2020-10-29 03:57:05,210 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 03:57:05,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=188, Invalid=3594, Unknown=0, NotChecked=0, Total=3782 [2020-10-29 03:57:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 03:57:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2020-10-29 03:57:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 03:57:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-29 03:57:05,226 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-29 03:57:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:05,226 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-29 03:57:05,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 03:57:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-29 03:57:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 03:57:05,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:05,227 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 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 03:57:05,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:57:05,227 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1860478119, now seen corresponding path program 23 times [2020-10-29 03:57:05,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:05,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383144350] [2020-10-29 03:57:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:05,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:05,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:06,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:09,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:10,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:10,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 03:57:10,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:57:10,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 03:57:10,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:10,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:57:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 03:57:10,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:10,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:10,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:10,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:10,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:10,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:10,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:57:10,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:10,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:10,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:10,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:10,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:10,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:10,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:10,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:10,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:10,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:10,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:10,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:10,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 64 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:10,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383144350] [2020-10-29 03:57:10,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:10,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:57:10,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104188772] [2020-10-29 03:57:10,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:57:10,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:10,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:57:10,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:57:10,707 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 24 states. [2020-10-29 03:57:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:11,906 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-29 03:57:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:57:11,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-29 03:57:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:11,909 INFO L225 Difference]: With dead ends: 109 [2020-10-29 03:57:11,909 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 03:57:11,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 03:57:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 03:57:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-29 03:57:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 03:57:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-29 03:57:11,931 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 69 [2020-10-29 03:57:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:11,931 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-29 03:57:11,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:57:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-29 03:57:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 03:57:11,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:11,932 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 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 03:57:11,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:57:11,933 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1072629376, now seen corresponding path program 24 times [2020-10-29 03:57:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:11,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892202202] [2020-10-29 03:57:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:11,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:12,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:13,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:14,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:16,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:16,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 03:57:16,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:57:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:57:16,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:16,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:57:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 03:57:16,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:17,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:17,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:17,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:17,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:17,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:17,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:57:17,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:17,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:17,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:17,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:17,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:17,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:17,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:17,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:17,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:17,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:17,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:17,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:17,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:17,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892202202] [2020-10-29 03:57:17,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:17,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:57:17,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181977569] [2020-10-29 03:57:17,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:57:17,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:57:17,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:57:17,367 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 24 states. [2020-10-29 03:57:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:18,024 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-10-29 03:57:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:57:18,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-10-29 03:57:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:18,026 INFO L225 Difference]: With dead ends: 115 [2020-10-29 03:57:18,026 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 03:57:18,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:57:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 03:57:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-29 03:57:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 03:57:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-29 03:57:18,045 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-29 03:57:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:18,045 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-29 03:57:18,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:57:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-29 03:57:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 03:57:18,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:18,046 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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 03:57:18,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:57:18,046 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:18,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:18,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2144801890, now seen corresponding path program 25 times [2020-10-29 03:57:18,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:18,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130929209] [2020-10-29 03:57:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:18,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:20,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:22,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5339 [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 03:57:23,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:23,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 03:57:23,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:23,957 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 26 [2020-10-29 03:57:24,153 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 25 [2020-10-29 03:57:24,580 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2020-10-29 03:57:24,965 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2020-10-29 03:57:25,156 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-10-29 03:57:25,371 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2020-10-29 03:57:25,752 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 54 [2020-10-29 03:57:26,211 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2020-10-29 03:57:26,407 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-29 03:57:26,705 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 57 [2020-10-29 03:57:29,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:29,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:29,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:29,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:29,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:57:29,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:29,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:29,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:29,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:29,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:29,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:29,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:29,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:29,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:29,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:57:29,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:29,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:29,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:29,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:29,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:29,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:29,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130929209] [2020-10-29 03:57:29,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:29,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 03:57:29,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878834498] [2020-10-29 03:57:29,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 03:57:29,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 03:57:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1796, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 03:57:29,868 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-10-29 03:57:31,684 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-29 03:57:32,595 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-29 03:57:32,953 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-29 03:57:37,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:37,482 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-10-29 03:57:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 03:57:37,483 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 72 [2020-10-29 03:57:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:37,484 INFO L225 Difference]: With dead ends: 120 [2020-10-29 03:57:37,485 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 03:57:37,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=192, Invalid=3968, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 03:57:37,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 03:57:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2020-10-29 03:57:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 03:57:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-29 03:57:37,508 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 72 [2020-10-29 03:57:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:37,508 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-29 03:57:37,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 03:57:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-29 03:57:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 03:57:37,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:37,509 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 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 03:57:37,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:57:37,510 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1719795396, now seen corresponding path program 26 times [2020-10-29 03:57:37,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:37,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458291279] [2020-10-29 03:57:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:37,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:42,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:42,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 03:57:42,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:57:42,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 03:57:42,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:42,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:42,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:57:42,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:42,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 03:57:42,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:43,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:43,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:43,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:43,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:43,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:57:43,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:43,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:43,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:43,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:43,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:43,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:43,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:43,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:43,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:43,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:43,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:43,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:43,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:43,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 100 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:43,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458291279] [2020-10-29 03:57:43,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:43,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:57:43,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262083151] [2020-10-29 03:57:43,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:57:43,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:43,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:57:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:57:43,084 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 26 states. [2020-10-29 03:57:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:44,986 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-10-29 03:57:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 03:57:44,988 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-10-29 03:57:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:44,992 INFO L225 Difference]: With dead ends: 117 [2020-10-29 03:57:44,992 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 03:57:44,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=538, Invalid=1814, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 03:57:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 03:57:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-10-29 03:57:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 03:57:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-29 03:57:45,013 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2020-10-29 03:57:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:45,013 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-29 03:57:45,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:57:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-29 03:57:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 03:57:45,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:45,014 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 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 03:57:45,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:57:45,014 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1536211257, now seen corresponding path program 27 times [2020-10-29 03:57:45,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:45,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901059215] [2020-10-29 03:57:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:45,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:45,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:45,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:45,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:46,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:48,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:49,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:50,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:50,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 03:57:50,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:57:50,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:57:50,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:50,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:50,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:57:50,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:50,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:57:50,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:50,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:57:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:50,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:50,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:50,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:57:50,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:50,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:57:50,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:50,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:50,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:50,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:57:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:50,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:50,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:57:50,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:57:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:57:50,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:50,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:57:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:57:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:57:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 157 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:57:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901059215] [2020-10-29 03:57:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:57:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:57:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81689445] [2020-10-29 03:57:50,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:57:50,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:57:50,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:57:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:57:50,661 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 26 states. [2020-10-29 03:57:51,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:57:51,629 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-10-29 03:57:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:57:51,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-29 03:57:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:57:51,632 INFO L225 Difference]: With dead ends: 123 [2020-10-29 03:57:51,632 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 03:57:51,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:57:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 03:57:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-29 03:57:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 03:57:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-29 03:57:51,654 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2020-10-29 03:57:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:57:51,655 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-29 03:57:51,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:57:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-29 03:57:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 03:57:51,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:57:51,655 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 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 03:57:51,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:57:51,656 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:57:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:57:51,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1341085403, now seen corresponding path program 28 times [2020-10-29 03:57:51,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:57:51,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075209044] [2020-10-29 03:57:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:57:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:57:51,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:54,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:57:56,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:57:56,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 03:57:56,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:57:56,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 03:57:56,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:57:56,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:57:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 03:57:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:57:56,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 03:57:56,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:57:57,345 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 32 [2020-10-29 03:57:57,502 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 30 [2020-10-29 03:57:57,653 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-29 03:57:57,799 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2020-10-29 03:57:57,988 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-10-29 03:57:58,174 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-10-29 03:57:58,366 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 43 [2020-10-29 03:57:58,570 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-29 03:57:58,811 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 43 [2020-10-29 03:57:59,029 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-10-29 03:57:59,335 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 49 [2020-10-29 03:57:59,602 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-29 03:57:59,970 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 54