/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:52:06,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:52:06,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:52:06,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:52:06,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:52:06,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:52:06,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:52:06,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:52:06,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:52:06,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:52:06,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:52:06,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:52:06,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:52:06,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:52:06,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:52:07,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:52:07,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:52:07,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:52:07,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:52:07,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:52:07,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:52:07,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:52:07,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:52:07,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:52:07,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:52:07,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:52:07,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:52:07,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:52:07,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:52:07,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:52:07,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:52:07,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:52:07,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:52:07,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:52:07,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:52:07,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:52:07,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:52:07,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:52:07,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:52:07,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:52:07,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:52:07,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:52:07,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:52:07,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:52:07,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:52:07,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:52:07,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:52:07,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:52:07,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:52:07,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:52:07,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:52:07,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:52:07,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:52:07,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:52:07,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:52:07,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:52:07,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:52:07,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:52:07,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:52:07,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:52:07,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:52:07,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:52:07,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:52:07,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:52:07,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:52:07,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:52:07,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:52:07,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:52:07,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:52:07,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:52:07,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:52:07,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:52:07,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:52:07,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:52:07,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:52:07,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:52:07,497 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:52:07,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label53.c [2020-10-26 20:52:07,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/327e6c518/ce811a941fdc4280a9fec88d2781f73a/FLAG567631bad [2020-10-26 20:52:08,458 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:52:08,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label53.c [2020-10-26 20:52:08,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/327e6c518/ce811a941fdc4280a9fec88d2781f73a/FLAG567631bad [2020-10-26 20:52:08,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/327e6c518/ce811a941fdc4280a9fec88d2781f73a [2020-10-26 20:52:08,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:52:08,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:52:08,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:52:08,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:52:08,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:52:08,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:52:08" (1/1) ... [2020-10-26 20:52:08,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4e8fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:08, skipping insertion in model container [2020-10-26 20:52:08,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:52:08" (1/1) ... [2020-10-26 20:52:08,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:52:08,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:52:09,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:52:09,486 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:52:09,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:52:09,994 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:52:09,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09 WrapperNode [2020-10-26 20:52:09,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:52:09,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:52:09,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:52:09,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:52:10,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... [2020-10-26 20:52:10,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... [2020-10-26 20:52:10,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... [2020-10-26 20:52:10,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... [2020-10-26 20:52:10,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... [2020-10-26 20:52:10,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... [2020-10-26 20:52:10,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... [2020-10-26 20:52:10,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:52:10,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:52:10,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:52:10,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:52:10,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:52:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:52:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:52:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:52:10,313 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:52:10,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:52:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:52:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:52:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:52:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:52:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:52:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:52:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:52:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:52:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:52:10,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:52:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:52:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:52:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:52:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:52:12,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:52:12,897 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:52:12,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:52:12 BoogieIcfgContainer [2020-10-26 20:52:12,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:52:12,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:52:12,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:52:12,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:52:12,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:52:08" (1/3) ... [2020-10-26 20:52:12,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643e708f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:52:12, skipping insertion in model container [2020-10-26 20:52:12,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:09" (2/3) ... [2020-10-26 20:52:12,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643e708f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:52:12, skipping insertion in model container [2020-10-26 20:52:12,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:52:12" (3/3) ... [2020-10-26 20:52:12,910 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label53.c [2020-10-26 20:52:12,923 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:52:12,929 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:52:12,943 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:52:12,975 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:52:12,976 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:52:12,976 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:52:12,976 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:52:12,976 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:52:12,976 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:52:12,977 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:52:12,977 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:52:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:52:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-26 20:52:13,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:13,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:13,025 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:13,032 INFO L82 PathProgramCache]: Analyzing trace with hash -853966388, now seen corresponding path program 1 times [2020-10-26 20:52:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:13,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714654141] [2020-10-26 20:52:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:14,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:17,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:17,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-26 20:52:17,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:52:17,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4399 [2020-10-26 20:52:17,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:52:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-26 20:52:17,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:52:18,443 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:18,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:18,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:18,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:18,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:18,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:52:18,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:18,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:52:18,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714654141] [2020-10-26 20:52:18,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:52:18,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:52:18,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853833154] [2020-10-26 20:52:18,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:52:18,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:18,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:52:18,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:52:18,657 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-26 20:52:18,955 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:22,407 INFO L93 Difference]: Finished difference Result 891 states and 1544 transitions. [2020-10-26 20:52:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:52:22,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2020-10-26 20:52:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:22,426 INFO L225 Difference]: With dead ends: 891 [2020-10-26 20:52:22,426 INFO L226 Difference]: Without dead ends: 483 [2020-10-26 20:52:22,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:52:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-26 20:52:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 477. [2020-10-26 20:52:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-26 20:52:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2020-10-26 20:52:22,527 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 725 transitions. Word has length 201 [2020-10-26 20:52:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:22,528 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 725 transitions. [2020-10-26 20:52:22,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:52:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 725 transitions. [2020-10-26 20:52:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-26 20:52:22,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:22,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:22,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:52:22,537 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:22,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1917081011, now seen corresponding path program 1 times [2020-10-26 20:52:22,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:22,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557802120] [2020-10-26 20:52:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:22,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:24,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:26,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:26,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-26 20:52:26,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:52:26,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3561 [2020-10-26 20:52:26,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:26,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:52:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:52:26,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:26,581 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:26,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:26,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:26,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:26,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:26,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:26,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:52:26,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:26,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:26,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:26,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:26,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:26,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:26,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:26,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:26,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:52:26,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:26,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:52:26,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:52:26,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:52:26,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557802120] [2020-10-26 20:52:26,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:52:26,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:52:26,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310713216] [2020-10-26 20:52:26,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:52:26,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:26,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:52:26,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:52:26,936 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 7 states. [2020-10-26 20:52:27,194 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:30,111 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:52:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:31,041 INFO L93 Difference]: Finished difference Result 1429 states and 2209 transitions. [2020-10-26 20:52:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:52:31,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 213 [2020-10-26 20:52:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:31,052 INFO L225 Difference]: With dead ends: 1429 [2020-10-26 20:52:31,052 INFO L226 Difference]: Without dead ends: 958 [2020-10-26 20:52:31,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:52:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-10-26 20:52:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 938. [2020-10-26 20:52:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-10-26 20:52:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1411 transitions. [2020-10-26 20:52:31,131 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1411 transitions. Word has length 213 [2020-10-26 20:52:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:31,132 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1411 transitions. [2020-10-26 20:52:31,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:52:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1411 transitions. [2020-10-26 20:52:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-26 20:52:31,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:31,141 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:31,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:52:31,142 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1348361791, now seen corresponding path program 1 times [2020-10-26 20:52:31,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:31,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343891755] [2020-10-26 20:52:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:31,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:33,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:33,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 20:52:33,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:52:33,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-26 20:52:33,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:33,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:52:33,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:33,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:52:33,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:33,681 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:33,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:33,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:33,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:33,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:33,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:33,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:52:33,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:33,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:33,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:33,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:33,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:33,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:33,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:33,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:33,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 20:52:33,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 20:52:33,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:52:33,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:52:34,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343891755] [2020-10-26 20:52:34,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:52:34,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:52:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039540640] [2020-10-26 20:52:34,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:52:34,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:52:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:52:34,151 INFO L87 Difference]: Start difference. First operand 938 states and 1411 transitions. Second operand 7 states. [2020-10-26 20:52:34,474 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:35,013 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:38,264 INFO L93 Difference]: Finished difference Result 2816 states and 4381 transitions. [2020-10-26 20:52:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:52:38,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 228 [2020-10-26 20:52:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:38,280 INFO L225 Difference]: With dead ends: 2816 [2020-10-26 20:52:38,280 INFO L226 Difference]: Without dead ends: 1884 [2020-10-26 20:52:38,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:52:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2020-10-26 20:52:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1843. [2020-10-26 20:52:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1843 states. [2020-10-26 20:52:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2684 transitions. [2020-10-26 20:52:38,377 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2684 transitions. Word has length 228 [2020-10-26 20:52:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:38,377 INFO L481 AbstractCegarLoop]: Abstraction has 1843 states and 2684 transitions. [2020-10-26 20:52:38,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:52:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2684 transitions. [2020-10-26 20:52:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-26 20:52:38,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:38,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:38,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:52:38,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:38,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1758117612, now seen corresponding path program 1 times [2020-10-26 20:52:38,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:38,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54048031] [2020-10-26 20:52:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:38,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:40,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-26 20:52:43,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:52:43,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-26 20:52:43,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:52:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:43,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:52:43,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:43,814 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:43,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:43,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:43,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:43,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:52:43,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:43,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:43,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:43,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:43,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:44,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:44,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:52:44,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:44,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 20:52:44,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:44,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:44,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:44,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:52:44,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:44,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:52:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:44,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:44,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:52:44,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:52:44,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:44,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:44,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:52:44,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:52:44,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54048031] [2020-10-26 20:52:44,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:44,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:52:44,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162586726] [2020-10-26 20:52:44,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:52:44,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:44,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:52:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:52:44,291 INFO L87 Difference]: Start difference. First operand 1843 states and 2684 transitions. Second operand 8 states. [2020-10-26 20:52:44,611 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:48,620 INFO L93 Difference]: Finished difference Result 5574 states and 8377 transitions. [2020-10-26 20:52:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:52:48,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 231 [2020-10-26 20:52:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:48,656 INFO L225 Difference]: With dead ends: 5574 [2020-10-26 20:52:48,656 INFO L226 Difference]: Without dead ends: 3737 [2020-10-26 20:52:48,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:52:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2020-10-26 20:52:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3694. [2020-10-26 20:52:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3694 states. [2020-10-26 20:52:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3694 states to 3694 states and 5467 transitions. [2020-10-26 20:52:48,836 INFO L78 Accepts]: Start accepts. Automaton has 3694 states and 5467 transitions. Word has length 231 [2020-10-26 20:52:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:48,838 INFO L481 AbstractCegarLoop]: Abstraction has 3694 states and 5467 transitions. [2020-10-26 20:52:48,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:52:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3694 states and 5467 transitions. [2020-10-26 20:52:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-26 20:52:48,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:48,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:48,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:52:48,854 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:48,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:48,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1487443352, now seen corresponding path program 1 times [2020-10-26 20:52:48,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:48,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262162635] [2020-10-26 20:52:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:50,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:51,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:51,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 20:52:51,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:52:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2930 [2020-10-26 20:52:51,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:52:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:52:51,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:52,162 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:52,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:52,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:52,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:52,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:52,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:52:52,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:52,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:52,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:52,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:52,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:52,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:52:52,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:52,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:52:52,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:52,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:52:52,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:52:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:52,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:52,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:52,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:52,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:52:52,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:52,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:52,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:52:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:52:52,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262162635] [2020-10-26 20:52:52,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:52,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:52:52,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092310130] [2020-10-26 20:52:52,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:52:52,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:52:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:52:52,526 INFO L87 Difference]: Start difference. First operand 3694 states and 5467 transitions. Second operand 8 states. [2020-10-26 20:52:52,954 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:53,204 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:52:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:59,727 INFO L93 Difference]: Finished difference Result 12837 states and 21330 transitions. [2020-10-26 20:52:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:52:59,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 233 [2020-10-26 20:52:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:59,815 INFO L225 Difference]: With dead ends: 12837 [2020-10-26 20:52:59,816 INFO L226 Difference]: Without dead ends: 9149 [2020-10-26 20:52:59,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:52:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9149 states. [2020-10-26 20:53:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9149 to 8870. [2020-10-26 20:53:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8870 states. [2020-10-26 20:53:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8870 states to 8870 states and 13568 transitions. [2020-10-26 20:53:00,261 INFO L78 Accepts]: Start accepts. Automaton has 8870 states and 13568 transitions. Word has length 233 [2020-10-26 20:53:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:00,263 INFO L481 AbstractCegarLoop]: Abstraction has 8870 states and 13568 transitions. [2020-10-26 20:53:00,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 8870 states and 13568 transitions. [2020-10-26 20:53:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-26 20:53:00,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:00,299 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:00,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:53:00,299 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash -14644798, now seen corresponding path program 1 times [2020-10-26 20:53:00,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:00,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182975125] [2020-10-26 20:53:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:00,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:04,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:05,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:05,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-26 20:53:05,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:53:05,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-26 20:53:05,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:05,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:05,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:53:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:53:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:05,726 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:05,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:05,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:05,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:05,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:05,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:05,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:53:05,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:05,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:05,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:05,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:05,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:05,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:05,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:05,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:05,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:53:05,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:05,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:53:05,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:05,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:05,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:05,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:53:05,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:05,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:53:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:05,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:05,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:05,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:53:05,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:05,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:53:05,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:05,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:05,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:05,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:53:05,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:05,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 20:53:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:53:05,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:05,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:53:06,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182975125] [2020-10-26 20:53:06,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:06,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:06,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509535626] [2020-10-26 20:53:06,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:06,044 INFO L87 Difference]: Start difference. First operand 8870 states and 13568 transitions. Second operand 7 states. [2020-10-26 20:53:06,485 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:53:07,275 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:53:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:12,483 INFO L93 Difference]: Finished difference Result 23672 states and 40543 transitions. [2020-10-26 20:53:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:53:12,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 243 [2020-10-26 20:53:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:12,597 INFO L225 Difference]: With dead ends: 23672 [2020-10-26 20:53:12,597 INFO L226 Difference]: Without dead ends: 14808 [2020-10-26 20:53:12,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:53:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14808 states. [2020-10-26 20:53:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14808 to 13624. [2020-10-26 20:53:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13624 states. [2020-10-26 20:53:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13624 states to 13624 states and 20396 transitions. [2020-10-26 20:53:13,329 INFO L78 Accepts]: Start accepts. Automaton has 13624 states and 20396 transitions. Word has length 243 [2020-10-26 20:53:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:13,329 INFO L481 AbstractCegarLoop]: Abstraction has 13624 states and 20396 transitions. [2020-10-26 20:53:13,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 13624 states and 20396 transitions. [2020-10-26 20:53:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-26 20:53:13,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:13,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:13,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:53:13,463 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1228253852, now seen corresponding path program 1 times [2020-10-26 20:53:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:13,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460716443] [2020-10-26 20:53:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:13,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:14,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:15,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:15,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:15,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-26 20:53:15,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:53:15,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2321 [2020-10-26 20:53:15,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 20:53:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:53:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-26 20:53:15,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:16,470 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:16,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:16,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:16,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:16,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:53:16,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:16,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:16,613 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:16,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:16,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:16,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:53:16,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:16,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 20:53:16,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:16,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:16,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:16,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:53:16,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:16,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:53:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:16,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:16,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:16,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:16,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 20:53:16,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:16,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:53:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:53:17,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460716443] [2020-10-26 20:53:17,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:17,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:53:17,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536769828] [2020-10-26 20:53:17,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:17,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:17,141 INFO L87 Difference]: Start difference. First operand 13624 states and 20396 transitions. Second operand 8 states. [2020-10-26 20:53:17,542 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:53:18,025 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:53:20,206 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:53:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:24,286 INFO L93 Difference]: Finished difference Result 34637 states and 57150 transitions. [2020-10-26 20:53:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:53:24,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 247 [2020-10-26 20:53:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:24,392 INFO L225 Difference]: With dead ends: 34637 [2020-10-26 20:53:24,392 INFO L226 Difference]: Without dead ends: 20907 [2020-10-26 20:53:24,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:53:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2020-10-26 20:53:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 20229. [2020-10-26 20:53:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20229 states. [2020-10-26 20:53:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20229 states to 20229 states and 31139 transitions. [2020-10-26 20:53:25,223 INFO L78 Accepts]: Start accepts. Automaton has 20229 states and 31139 transitions. Word has length 247 [2020-10-26 20:53:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:25,223 INFO L481 AbstractCegarLoop]: Abstraction has 20229 states and 31139 transitions. [2020-10-26 20:53:25,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 20229 states and 31139 transitions. [2020-10-26 20:53:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-26 20:53:25,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:25,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:25,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:53:25,314 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash -462862326, now seen corresponding path program 1 times [2020-10-26 20:53:25,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:25,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123004390] [2020-10-26 20:53:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:25,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:26,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:28,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:28,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-26 20:53:28,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:28,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2663 [2020-10-26 20:53:28,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:53:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:28,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:53:28,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:28,292 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:28,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:28,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:28,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:28,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:28,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:53:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:28,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:28,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:53:28,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:53:28,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123004390] [2020-10-26 20:53:28,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:53:28,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:53:28,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383302978] [2020-10-26 20:53:28,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:28,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:28,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:28,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:28,615 INFO L87 Difference]: Start difference. First operand 20229 states and 31139 transitions. Second operand 7 states. [2020-10-26 20:53:28,879 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:53:29,951 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:53:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:32,439 INFO L93 Difference]: Finished difference Result 47683 states and 75138 transitions. [2020-10-26 20:53:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:53:32,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 246 [2020-10-26 20:53:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:32,556 INFO L225 Difference]: With dead ends: 47683 [2020-10-26 20:53:32,556 INFO L226 Difference]: Without dead ends: 27677 [2020-10-26 20:53:32,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:53:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27677 states. [2020-10-26 20:53:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27677 to 27526. [2020-10-26 20:53:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27526 states. [2020-10-26 20:53:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27526 states to 27526 states and 40130 transitions. [2020-10-26 20:53:33,639 INFO L78 Accepts]: Start accepts. Automaton has 27526 states and 40130 transitions. Word has length 246 [2020-10-26 20:53:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:33,640 INFO L481 AbstractCegarLoop]: Abstraction has 27526 states and 40130 transitions. [2020-10-26 20:53:33,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 27526 states and 40130 transitions. [2020-10-26 20:53:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-26 20:53:33,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:33,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:33,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:53:33,710 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash 536301671, now seen corresponding path program 1 times [2020-10-26 20:53:33,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:33,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143593339] [2020-10-26 20:53:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:33,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:33,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:38,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:38,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 20:53:38,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:38,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 20:53:38,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:38,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:53:38,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:38,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:53:38,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:39,030 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:39,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:39,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:39,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:39,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:39,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:39,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:53:39,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:39,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:39,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:39,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:39,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:39,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:53:39,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:39,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:53:39,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:39,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:39,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:39,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:53:39,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:39,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:53:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:39,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:39,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:39,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:53:39,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143593339] [2020-10-26 20:53:39,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:39,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:39,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87780854] [2020-10-26 20:53:39,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:39,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:39,357 INFO L87 Difference]: Start difference. First operand 27526 states and 40130 transitions. Second operand 7 states. [2020-10-26 20:53:39,608 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:53:40,976 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:53:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:43,405 INFO L93 Difference]: Finished difference Result 56122 states and 83126 transitions. [2020-10-26 20:53:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:53:43,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-26 20:53:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:43,527 INFO L225 Difference]: With dead ends: 56122 [2020-10-26 20:53:43,527 INFO L226 Difference]: Without dead ends: 32426 [2020-10-26 20:53:43,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:53:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32426 states. [2020-10-26 20:53:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32426 to 32002. [2020-10-26 20:53:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32002 states. [2020-10-26 20:53:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32002 states to 32002 states and 46347 transitions. [2020-10-26 20:53:44,521 INFO L78 Accepts]: Start accepts. Automaton has 32002 states and 46347 transitions. Word has length 256 [2020-10-26 20:53:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:44,522 INFO L481 AbstractCegarLoop]: Abstraction has 32002 states and 46347 transitions. [2020-10-26 20:53:44,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32002 states and 46347 transitions. [2020-10-26 20:53:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-26 20:53:44,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:44,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:44,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:53:44,586 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash -72648769, now seen corresponding path program 1 times [2020-10-26 20:53:44,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:44,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883976084] [2020-10-26 20:53:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:44,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:45,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:45,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-26 20:53:45,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:45,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-26 20:53:45,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:53:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 20:53:45,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:45,988 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:45,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:46,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:46,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:46,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:46,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:46,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:53:46,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:46,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:46,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:46,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:46,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:46,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:53:46,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:46,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-26 20:53:46,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:46,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:46,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:53:46,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:53:46,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883976084] [2020-10-26 20:53:46,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:53:46,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:53:46,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392219497] [2020-10-26 20:53:46,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:46,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:46,528 INFO L87 Difference]: Start difference. First operand 32002 states and 46347 transitions. Second operand 7 states. [2020-10-26 20:53:46,805 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:53:48,036 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-26 20:53:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:51,140 INFO L93 Difference]: Finished difference Result 72953 states and 104706 transitions. [2020-10-26 20:53:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:53:51,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2020-10-26 20:53:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:51,276 INFO L225 Difference]: With dead ends: 72953 [2020-10-26 20:53:51,276 INFO L226 Difference]: Without dead ends: 41935 [2020-10-26 20:53:51,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:53:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41935 states. [2020-10-26 20:53:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41935 to 41672. [2020-10-26 20:53:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41672 states. [2020-10-26 20:53:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41672 states to 41672 states and 57718 transitions. [2020-10-26 20:53:53,045 INFO L78 Accepts]: Start accepts. Automaton has 41672 states and 57718 transitions. Word has length 279 [2020-10-26 20:53:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:53,045 INFO L481 AbstractCegarLoop]: Abstraction has 41672 states and 57718 transitions. [2020-10-26 20:53:53,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 41672 states and 57718 transitions. [2020-10-26 20:53:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-26 20:53:53,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:53,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:53,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:53:53,095 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:53,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:53,095 INFO L82 PathProgramCache]: Analyzing trace with hash 901327787, now seen corresponding path program 1 times [2020-10-26 20:53:53,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:53,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559269441] [2020-10-26 20:53:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:53,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:54,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:55,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:58,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:58,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-26 20:53:58,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:53:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 20:53:58,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 20:53:58,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:58,428 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:58,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:58,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:58,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:58,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:58,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:53:58,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:58,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:58,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:58,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:53:58,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:58,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 20:53:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:58,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:53:58,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:58,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 20:53:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:58,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:58,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:58,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:53:58,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:53:58,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:53:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 89 proven. 63 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:53:59,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559269441] [2020-10-26 20:53:59,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:59,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:53:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142887138] [2020-10-26 20:53:59,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:59,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:59,145 INFO L87 Difference]: Start difference. First operand 41672 states and 57718 transitions. Second operand 8 states. [2020-10-26 20:53:59,443 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:54:00,708 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:54:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:04,518 INFO L93 Difference]: Finished difference Result 82060 states and 117924 transitions. [2020-10-26 20:54:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:54:04,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 294 [2020-10-26 20:54:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:04,711 INFO L225 Difference]: With dead ends: 82060 [2020-10-26 20:54:04,711 INFO L226 Difference]: Without dead ends: 54587 [2020-10-26 20:54:04,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:54:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54587 states. [2020-10-26 20:54:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54587 to 54217. [2020-10-26 20:54:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54217 states. [2020-10-26 20:54:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54217 states to 54217 states and 76000 transitions. [2020-10-26 20:54:06,819 INFO L78 Accepts]: Start accepts. Automaton has 54217 states and 76000 transitions. Word has length 294 [2020-10-26 20:54:06,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:06,823 INFO L481 AbstractCegarLoop]: Abstraction has 54217 states and 76000 transitions. [2020-10-26 20:54:06,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:54:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 54217 states and 76000 transitions. [2020-10-26 20:54:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-26 20:54:06,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:06,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:54:06,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:54:06,980 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:06,983 INFO L82 PathProgramCache]: Analyzing trace with hash 67610194, now seen corresponding path program 1 times [2020-10-26 20:54:06,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:06,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315029979] [2020-10-26 20:54:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:07,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:07,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:12,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:54:12,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:12,405 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:12,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:12,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:12,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:12,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:12,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:54:12,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:12,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:12,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:12,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:12,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:54:12,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:12,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 20:54:12,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:54:12,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:12,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:54:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:12,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:12,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:12,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:54:12,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:12,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:54:12,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:54:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:12,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 20:54:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:12,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:12,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:12,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:12,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:54:12,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:54:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:12,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 89 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:54:13,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315029979] [2020-10-26 20:54:13,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:13,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922062450] [2020-10-26 20:54:13,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:13,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:13,088 INFO L87 Difference]: Start difference. First operand 54217 states and 76000 transitions. Second operand 7 states. [2020-10-26 20:54:13,419 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:54:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:17,997 INFO L93 Difference]: Finished difference Result 93610 states and 135805 transitions. [2020-10-26 20:54:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:54:17,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 301 [2020-10-26 20:54:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:18,166 INFO L225 Difference]: With dead ends: 93610 [2020-10-26 20:54:18,166 INFO L226 Difference]: Without dead ends: 67361 [2020-10-26 20:54:18,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:54:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67361 states. [2020-10-26 20:54:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67361 to 66865. [2020-10-26 20:54:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66865 states. [2020-10-26 20:54:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66865 states to 66865 states and 96277 transitions. [2020-10-26 20:54:20,646 INFO L78 Accepts]: Start accepts. Automaton has 66865 states and 96277 transitions. Word has length 301 [2020-10-26 20:54:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:20,647 INFO L481 AbstractCegarLoop]: Abstraction has 66865 states and 96277 transitions. [2020-10-26 20:54:20,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 66865 states and 96277 transitions. [2020-10-26 20:54:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-26 20:54:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:20,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:54:20,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:54:20,754 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1273449489, now seen corresponding path program 1 times [2020-10-26 20:54:20,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:20,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562283395] [2020-10-26 20:54:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:20,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:21,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:21,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:23,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 20:54:25,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:26,131 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:26,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:26,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:26,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:26,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:26,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:54:26,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:26,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:26,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:26,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:26,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:26,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:54:26,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:26,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 20:54:26,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:26,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:26,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:26,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:54:26,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:26,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 20:54:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:26,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:26,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:26,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:54:26,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:26,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:54:26,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:26,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:26,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:54:26,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:26,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:54:26,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562283395] [2020-10-26 20:54:26,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:26,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:26,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648981351] [2020-10-26 20:54:26,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:26,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:26,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:26,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:26,548 INFO L87 Difference]: Start difference. First operand 66865 states and 96277 transitions. Second operand 7 states. [2020-10-26 20:54:26,811 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:54:30,379 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:54:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:32,256 INFO L93 Difference]: Finished difference Result 153642 states and 239671 transitions. [2020-10-26 20:54:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:54:32,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 301 [2020-10-26 20:54:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:32,600 INFO L225 Difference]: With dead ends: 153642 [2020-10-26 20:54:32,600 INFO L226 Difference]: Without dead ends: 105578 [2020-10-26 20:54:32,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:54:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105578 states. [2020-10-26 20:54:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105578 to 104819. [2020-10-26 20:54:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104819 states. [2020-10-26 20:54:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104819 states to 104819 states and 155484 transitions. [2020-10-26 20:54:35,692 INFO L78 Accepts]: Start accepts. Automaton has 104819 states and 155484 transitions. Word has length 301 [2020-10-26 20:54:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:35,692 INFO L481 AbstractCegarLoop]: Abstraction has 104819 states and 155484 transitions. [2020-10-26 20:54:35,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 104819 states and 155484 transitions. [2020-10-26 20:54:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-26 20:54:36,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:36,103 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:54:36,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:54:36,103 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -810331760, now seen corresponding path program 1 times [2020-10-26 20:54:36,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:36,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929070899] [2020-10-26 20:54:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:36,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:36,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:41,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:41,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:54:41,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:54:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 20:54:41,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:54:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:41,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:54:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:41,427 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:41,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:41,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:41,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:41,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:41,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:54:41,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:41,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:41,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:54:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:41,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 20:54:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:41,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:41,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:41,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:41,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:54:41,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:41,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:41,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:54:41,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:41,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:41,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:54:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:41,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:41,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:54:41,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:41,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:54:41,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:41,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:41,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:54:41,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:41,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:41,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:54:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:41,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:41,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:41,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:54:41,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:54:41,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:54:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 92 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 20:54:41,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929070899] [2020-10-26 20:54:41,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117233089] [2020-10-26 20:54:41,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:41,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:41,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:41,920 INFO L87 Difference]: Start difference. First operand 104819 states and 155484 transitions. Second operand 7 states. [2020-10-26 20:54:42,188 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:54:43,769 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:54:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:48,118 INFO L93 Difference]: Finished difference Result 240832 states and 367764 transitions. [2020-10-26 20:54:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:54:48,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 305 [2020-10-26 20:54:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:48,631 INFO L225 Difference]: With dead ends: 240832 [2020-10-26 20:54:48,631 INFO L226 Difference]: Without dead ends: 149320 [2020-10-26 20:54:48,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:54:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149320 states. [2020-10-26 20:54:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149320 to 148930. [2020-10-26 20:54:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148930 states. [2020-10-26 20:54:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148930 states to 148930 states and 219595 transitions. [2020-10-26 20:54:52,628 INFO L78 Accepts]: Start accepts. Automaton has 148930 states and 219595 transitions. Word has length 305 [2020-10-26 20:54:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:52,628 INFO L481 AbstractCegarLoop]: Abstraction has 148930 states and 219595 transitions. [2020-10-26 20:54:52,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 148930 states and 219595 transitions. [2020-10-26 20:54:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-26 20:54:53,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:53,145 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:54:53,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:54:53,145 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash -346992864, now seen corresponding path program 1 times [2020-10-26 20:54:53,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:53,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379876886] [2020-10-26 20:54:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:53,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:53,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:57,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 20:54:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,513 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:58,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:58,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:54:58,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:58,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:54:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 20:54:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:54:58,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:54:58,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-26 20:54:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:54:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:58,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 102 proven. 37 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:54:59,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379876886] [2020-10-26 20:54:59,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:59,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:59,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155633504] [2020-10-26 20:54:59,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:59,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:59,012 INFO L87 Difference]: Start difference. First operand 148930 states and 219595 transitions. Second operand 7 states. [2020-10-26 20:54:59,268 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:55:00,564 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:55:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:05,323 INFO L93 Difference]: Finished difference Result 301585 states and 453887 transitions. [2020-10-26 20:55:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:55:05,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 312 [2020-10-26 20:55:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:05,893 INFO L225 Difference]: With dead ends: 301585 [2020-10-26 20:55:05,894 INFO L226 Difference]: Without dead ends: 169515 [2020-10-26 20:55:06,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:55:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169515 states. [2020-10-26 20:55:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169515 to 168249. [2020-10-26 20:55:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168249 states. [2020-10-26 20:55:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168249 states to 168249 states and 242300 transitions. [2020-10-26 20:55:10,540 INFO L78 Accepts]: Start accepts. Automaton has 168249 states and 242300 transitions. Word has length 312 [2020-10-26 20:55:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:10,541 INFO L481 AbstractCegarLoop]: Abstraction has 168249 states and 242300 transitions. [2020-10-26 20:55:10,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:55:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 168249 states and 242300 transitions. [2020-10-26 20:55:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-26 20:55:11,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:11,112 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:11,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:55:11,112 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1416144316, now seen corresponding path program 1 times [2020-10-26 20:55:11,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:11,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116751737] [2020-10-26 20:55:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:11,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:11,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:11,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:15,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:16,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:16,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-26 20:55:16,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:55:16,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 20:55:16,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:55:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:16,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:55:16,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:16,462 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:16,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:16,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:16,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:16,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:16,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:16,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:16,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:55:16,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:16,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:16,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:55:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:16,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:55:16,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:16,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 20:55:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:16,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:16,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:16,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:55:16,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:55:16,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:55:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:55:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:55:16,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:55:16,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116751737] [2020-10-26 20:55:16,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:16,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:55:16,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72845069] [2020-10-26 20:55:16,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:55:16,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:16,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:55:16,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:55:16,975 INFO L87 Difference]: Start difference. First operand 168249 states and 242300 transitions. Second operand 8 states. [2020-10-26 20:55:17,274 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:55:19,800 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159