/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:15:37,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:15:37,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:15:37,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:15:37,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:15:37,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:15:37,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:15:37,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:15:38,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:15:38,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:15:38,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:15:38,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:15:38,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:15:38,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:15:38,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:15:38,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:15:38,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:15:38,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:15:38,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:15:38,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:15:38,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:15:38,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:15:38,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:15:38,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:15:38,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:15:38,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:15:38,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:15:38,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:15:38,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:15:38,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:15:38,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:15:38,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:15:38,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:15:38,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:15:38,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:15:38,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:15:38,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:15:38,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:15:38,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:15:38,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:15:38,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:15:38,058 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 [2020-10-28 10:15:38,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:15:38,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:15:38,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:15:38,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:15:38,088 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:15:38,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:15:38,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:15:38,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:15:38,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:15:38,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:15:38,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:15:38,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:15:38,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:15:38,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:15:38,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:15:38,091 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:15:38,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:15:38,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:15:38,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:15:38,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:15:38,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:15:38,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:15:38,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:15:38,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:15:38,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:15:38,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:15:38,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:15:38,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:15:38,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:15:38,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:15:38,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:15:38,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:15:38,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:15:38,557 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:15:38,558 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:15:38,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label26.c [2020-10-28 10:15:38,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/495a7880e/dd7128a8f0a64a47978222445b87ca18/FLAGd681b488e [2020-10-28 10:15:39,500 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:15:39,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label26.c [2020-10-28 10:15:39,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/495a7880e/dd7128a8f0a64a47978222445b87ca18/FLAGd681b488e [2020-10-28 10:15:39,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/495a7880e/dd7128a8f0a64a47978222445b87ca18 [2020-10-28 10:15:39,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:15:39,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:15:39,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:15:39,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:15:39,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:15:39,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:15:39" (1/1) ... [2020-10-28 10:15:39,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53fb308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:39, skipping insertion in model container [2020-10-28 10:15:39,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:15:39" (1/1) ... [2020-10-28 10:15:39,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:15:39,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:15:40,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:15:40,703 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:15:41,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:15:41,123 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:15:41,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41 WrapperNode [2020-10-28 10:15:41,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:15:41,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:15:41,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:15:41,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:15:41,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (1/1) ... [2020-10-28 10:15:41,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (1/1) ... [2020-10-28 10:15:41,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (1/1) ... [2020-10-28 10:15:41,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (1/1) ... [2020-10-28 10:15:41,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (1/1) ... [2020-10-28 10:15:41,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (1/1) ... [2020-10-28 10:15:41,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (1/1) ... [2020-10-28 10:15:41,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:15:41,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:15:41,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:15:41,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:15:41,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (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 [2020-10-28 10:15:41,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:15:41,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:15:41,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:15:41,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:15:41,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:15:41,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:15:41,443 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:15:41,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:15:41,444 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:15:41,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:15:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:15:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:15:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:15:41,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:15:41,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:15:41,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:15:41,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:15:41,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:15:41,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:15:43,948 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:15:43,948 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:15:43,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:15:43 BoogieIcfgContainer [2020-10-28 10:15:43,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:15:43,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:15:43,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:15:43,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:15:43,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:15:39" (1/3) ... [2020-10-28 10:15:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512a7983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:15:43, skipping insertion in model container [2020-10-28 10:15:43,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:15:41" (2/3) ... [2020-10-28 10:15:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512a7983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:15:43, skipping insertion in model container [2020-10-28 10:15:43,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:15:43" (3/3) ... [2020-10-28 10:15:43,960 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2020-10-28 10:15:43,974 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:15:43,980 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:15:43,995 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:15:44,026 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:15:44,026 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:15:44,026 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:15:44,026 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:15:44,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:15:44,027 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:15:44,027 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:15:44,027 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:15:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:15:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 10:15:44,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:44,071 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] [2020-10-28 10:15:44,072 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1608130892, now seen corresponding path program 1 times [2020-10-28 10:15:44,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:44,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255432409] [2020-10-28 10:15:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:44,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:48,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:48,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 10:15:48,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:15:48,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4408 [2020-10-28 10:15:48,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:48,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:48,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:15:48,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:15:48,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-28 10:15:48,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:15:49,470 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:49,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:49,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:49,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:49,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 10:15:49,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:49,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:49,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:15:49,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:15:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:15:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255432409] [2020-10-28 10:15:49,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:15:49,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:15:49,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277340564] [2020-10-28 10:15:49,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:15:49,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:15:49,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:15:49,695 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:15:49,941 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:53,585 INFO L93 Difference]: Finished difference Result 863 states and 1524 transitions. [2020-10-28 10:15:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:15:53,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-10-28 10:15:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:53,614 INFO L225 Difference]: With dead ends: 863 [2020-10-28 10:15:53,615 INFO L226 Difference]: Without dead ends: 484 [2020-10-28 10:15:53,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:15:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-28 10:15:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 466. [2020-10-28 10:15:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-28 10:15:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 744 transitions. [2020-10-28 10:15:53,747 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 744 transitions. Word has length 163 [2020-10-28 10:15:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:53,748 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 744 transitions. [2020-10-28 10:15:53,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:15:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 744 transitions. [2020-10-28 10:15:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-28 10:15:53,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:53,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:53,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:15:53,758 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1742190307, now seen corresponding path program 1 times [2020-10-28 10:15:53,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:53,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791952878] [2020-10-28 10:15:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:53,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:54,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:55,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:56,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:56,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 10:15:56,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:15:56,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2862 [2020-10-28 10:15:56,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:56,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:56,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:15:56,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 10:15:56,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:15:57,175 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:57,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:57,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:57,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:57,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:57,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:15:57,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:57,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:57,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:57,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:57,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:57,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:57,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:15:57,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:57,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:15:57,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:57,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:15:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:15:57,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791952878] [2020-10-28 10:15:57,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:57,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:15:57,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760942816] [2020-10-28 10:15:57,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:15:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:15:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:15:57,440 INFO L87 Difference]: Start difference. First operand 466 states and 744 transitions. Second operand 5 states. [2020-10-28 10:15:57,734 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:01,382 INFO L93 Difference]: Finished difference Result 1362 states and 2201 transitions. [2020-10-28 10:16:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:16:01,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2020-10-28 10:16:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:01,403 INFO L225 Difference]: With dead ends: 1362 [2020-10-28 10:16:01,404 INFO L226 Difference]: Without dead ends: 902 [2020-10-28 10:16:01,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:16:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2020-10-28 10:16:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 897. [2020-10-28 10:16:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-10-28 10:16:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1337 transitions. [2020-10-28 10:16:01,496 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1337 transitions. Word has length 172 [2020-10-28 10:16:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:01,498 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1337 transitions. [2020-10-28 10:16:01,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:16:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1337 transitions. [2020-10-28 10:16:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-28 10:16:01,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:01,516 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:01,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:16:01,516 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash -186142553, now seen corresponding path program 1 times [2020-10-28 10:16:01,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:01,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716278751] [2020-10-28 10:16:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:01,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:02,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:05,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:05,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-28 10:16:05,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:16:05,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4201 [2020-10-28 10:16:05,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:05,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 10:16:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 10:16:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:06,306 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:06,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:06,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:06,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:06,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:06,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:16:06,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:06,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:06,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:06,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:06,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:06,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:06,461 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:16:06,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:06,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:06,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:16:06,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:06,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:16:06,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:06,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:06,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:06,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:06,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 10:16:06,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:16:06,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716278751] [2020-10-28 10:16:06,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:06,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:16:06,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932003412] [2020-10-28 10:16:06,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:16:06,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:06,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:16:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:16:06,563 INFO L87 Difference]: Start difference. First operand 897 states and 1337 transitions. Second operand 5 states. [2020-10-28 10:16:06,803 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:16:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:09,934 INFO L93 Difference]: Finished difference Result 2628 states and 3981 transitions. [2020-10-28 10:16:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:16:09,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2020-10-28 10:16:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:09,955 INFO L225 Difference]: With dead ends: 2628 [2020-10-28 10:16:09,955 INFO L226 Difference]: Without dead ends: 1737 [2020-10-28 10:16:09,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:16:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2020-10-28 10:16:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1733. [2020-10-28 10:16:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2020-10-28 10:16:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2298 transitions. [2020-10-28 10:16:10,058 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2298 transitions. Word has length 174 [2020-10-28 10:16:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:10,059 INFO L481 AbstractCegarLoop]: Abstraction has 1733 states and 2298 transitions. [2020-10-28 10:16:10,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:16:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2298 transitions. [2020-10-28 10:16:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-28 10:16:10,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:10,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 10:16:10,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:16:10,068 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:10,068 INFO L82 PathProgramCache]: Analyzing trace with hash 603745846, now seen corresponding path program 1 times [2020-10-28 10:16:10,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:10,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304866154] [2020-10-28 10:16:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:10,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:13,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:15,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:15,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:15,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-28 10:16:15,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:16:15,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-28 10:16:15,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:15,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:16:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 10:16:15,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 10:16:15,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:15,525 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:15,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:15,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:15,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:15,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:15,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:15,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:16:15,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:15,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:15,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:15,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:15,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:15,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:15,701 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:16:15,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:15,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:15,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:15,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:16:15,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:16:15,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:15,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:15,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:16:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:15,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:15,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:15,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:16:15,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:15,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:16:15,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:15,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 10:16:15,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:15,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:16:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:15,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:15,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:15,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:16:15,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:15,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-28 10:16:15,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:15,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:15,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:15,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:15,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:16:15,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 54 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:16:16,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304866154] [2020-10-28 10:16:16,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:16,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:16:16,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715963988] [2020-10-28 10:16:16,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:16:16,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:16,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:16:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:16:16,109 INFO L87 Difference]: Start difference. First operand 1733 states and 2298 transitions. Second operand 6 states. [2020-10-28 10:16:16,559 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:16:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:20,029 INFO L93 Difference]: Finished difference Result 4335 states and 6027 transitions. [2020-10-28 10:16:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:16:20,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2020-10-28 10:16:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:20,049 INFO L225 Difference]: With dead ends: 4335 [2020-10-28 10:16:20,049 INFO L226 Difference]: Without dead ends: 2608 [2020-10-28 10:16:20,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2020-10-28 10:16:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2585. [2020-10-28 10:16:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2585 states. [2020-10-28 10:16:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3553 transitions. [2020-10-28 10:16:20,175 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3553 transitions. Word has length 211 [2020-10-28 10:16:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:20,176 INFO L481 AbstractCegarLoop]: Abstraction has 2585 states and 3553 transitions. [2020-10-28 10:16:20,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:16:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3553 transitions. [2020-10-28 10:16:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-28 10:16:20,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:20,187 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:20,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:16:20,187 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:20,188 INFO L82 PathProgramCache]: Analyzing trace with hash -247812253, now seen corresponding path program 1 times [2020-10-28 10:16:20,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:20,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000598262] [2020-10-28 10:16:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:20,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:24,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:24,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 10:16:24,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:16:24,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3967 [2020-10-28 10:16:24,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:24,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:24,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:16:24,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:16:24,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 10:16:24,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:16:24,538 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:24,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:24,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:24,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:24,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:24,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:16:24,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:24,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:16:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:24,724 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:16:24,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:24,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:24,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:16:24,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:24,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 10:16:24,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:24,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:24,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:24,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:24,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:16:24,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:25,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 10:16:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:25,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:25,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:25,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:16:25,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:25,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:16:25,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:25,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 10:16:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:25,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:16:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:16:25,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000598262] [2020-10-28 10:16:25,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:25,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:25,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351635233] [2020-10-28 10:16:25,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:25,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:25,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:25,247 INFO L87 Difference]: Start difference. First operand 2585 states and 3553 transitions. Second operand 7 states. [2020-10-28 10:16:25,521 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:16:26,027 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:16:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:29,790 INFO L93 Difference]: Finished difference Result 6555 states and 9451 transitions. [2020-10-28 10:16:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:16:29,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2020-10-28 10:16:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:29,835 INFO L225 Difference]: With dead ends: 6555 [2020-10-28 10:16:29,835 INFO L226 Difference]: Without dead ends: 3976 [2020-10-28 10:16:29,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:16:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2020-10-28 10:16:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3935. [2020-10-28 10:16:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3935 states. [2020-10-28 10:16:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 5459 transitions. [2020-10-28 10:16:29,988 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 5459 transitions. Word has length 212 [2020-10-28 10:16:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:29,989 INFO L481 AbstractCegarLoop]: Abstraction has 3935 states and 5459 transitions. [2020-10-28 10:16:29,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 5459 transitions. [2020-10-28 10:16:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-28 10:16:30,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:30,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 10:16:30,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:16:30,004 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:30,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1268712217, now seen corresponding path program 1 times [2020-10-28 10:16:30,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:30,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636075213] [2020-10-28 10:16:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:30,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:30,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:30,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:35,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:35,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 10:16:35,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:16:35,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 10:16:35,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:35,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:35,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 10:16:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 10:16:35,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:35,389 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:35,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:35,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:35,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:35,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:16:35,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:35,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:35,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:35,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:35,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:16:35,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:35,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:16:35,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:35,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:35,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:35,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:35,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:16:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:35,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:35,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:35,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:16:35,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:35,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:16:35,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:35,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:16:35,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:35,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:16:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:35,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:35,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:35,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:16:35,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 10:16:35,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:35,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:16:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 10:16:35,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636075213] [2020-10-28 10:16:35,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:35,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:35,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483079144] [2020-10-28 10:16:35,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:35,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:35,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:35,802 INFO L87 Difference]: Start difference. First operand 3935 states and 5459 transitions. Second operand 7 states. [2020-10-28 10:16:36,072 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:16:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:38,259 INFO L93 Difference]: Finished difference Result 7822 states and 10934 transitions. [2020-10-28 10:16:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:16:38,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 215 [2020-10-28 10:16:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:38,283 INFO L225 Difference]: With dead ends: 7822 [2020-10-28 10:16:38,284 INFO L226 Difference]: Without dead ends: 3893 [2020-10-28 10:16:38,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:16:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2020-10-28 10:16:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3889. [2020-10-28 10:16:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3889 states. [2020-10-28 10:16:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 5277 transitions. [2020-10-28 10:16:38,437 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 5277 transitions. Word has length 215 [2020-10-28 10:16:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:38,437 INFO L481 AbstractCegarLoop]: Abstraction has 3889 states and 5277 transitions. [2020-10-28 10:16:38,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 5277 transitions. [2020-10-28 10:16:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 10:16:38,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:38,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 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] [2020-10-28 10:16:38,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:16:38,453 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash -109236198, now seen corresponding path program 1 times [2020-10-28 10:16:38,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:38,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593791485] [2020-10-28 10:16:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:38,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:38,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:39,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:41,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:43,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:43,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 10:16:43,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:16:43,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 10:16:43,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:43,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 10:16:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 10:16:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:43,842 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:43,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:43,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:43,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:43,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:43,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:43,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:16:43,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:43,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:43,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:43,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:43,995 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:16:43,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:44,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:44,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:16:44,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:44,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:16:44,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:44,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:44,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:44,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:44,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:44,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:44,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:16:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:44,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:44,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:16:44,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:16:44,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:44,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:44,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:16:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:44,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:44,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:44,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:44,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:44,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:16:44,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:44,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 10:16:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:44,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:44,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:44,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:16:44,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:44,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 10:16:44,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:44,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:44,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:44,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:44,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:16:44,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 10:16:44,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593791485] [2020-10-28 10:16:44,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:44,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:44,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637320453] [2020-10-28 10:16:44,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:44,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:44,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:44,481 INFO L87 Difference]: Start difference. First operand 3889 states and 5277 transitions. Second operand 7 states. [2020-10-28 10:16:44,950 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:46,335 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:49,061 INFO L93 Difference]: Finished difference Result 11422 states and 17800 transitions. [2020-10-28 10:16:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:16:49,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 237 [2020-10-28 10:16:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:49,127 INFO L225 Difference]: With dead ends: 11422 [2020-10-28 10:16:49,127 INFO L226 Difference]: Without dead ends: 7539 [2020-10-28 10:16:49,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-28 10:16:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7539 states. [2020-10-28 10:16:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7539 to 7303. [2020-10-28 10:16:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7303 states. [2020-10-28 10:16:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 9675 transitions. [2020-10-28 10:16:49,514 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 9675 transitions. Word has length 237 [2020-10-28 10:16:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:49,515 INFO L481 AbstractCegarLoop]: Abstraction has 7303 states and 9675 transitions. [2020-10-28 10:16:49,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 9675 transitions. [2020-10-28 10:16:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 10:16:49,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:49,540 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, 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] [2020-10-28 10:16:49,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:16:49,541 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:49,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1957960721, now seen corresponding path program 1 times [2020-10-28 10:16:49,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:49,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204978945] [2020-10-28 10:16:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:49,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:16:50,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:16:50,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 10:16:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:50,927 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:50,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:50,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:50,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:50,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:16:50,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:50,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:16:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:51,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:51,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:51,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:51,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 10:16:51,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:51,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-28 10:16:51,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:51,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:51,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 10:16:51,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:16:51,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204978945] [2020-10-28 10:16:51,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:16:51,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:16:51,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938855901] [2020-10-28 10:16:51,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:51,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:51,511 INFO L87 Difference]: Start difference. First operand 7303 states and 9675 transitions. Second operand 7 states. [2020-10-28 10:16:51,786 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:16:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:55,958 INFO L93 Difference]: Finished difference Result 18776 states and 26156 transitions. [2020-10-28 10:16:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:16:55,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 245 [2020-10-28 10:16:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:56,031 INFO L225 Difference]: With dead ends: 18776 [2020-10-28 10:16:56,032 INFO L226 Difference]: Without dead ends: 11479 [2020-10-28 10:16:56,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 10:16:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11479 states. [2020-10-28 10:16:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11479 to 11377. [2020-10-28 10:16:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11377 states. [2020-10-28 10:16:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11377 states to 11377 states and 15472 transitions. [2020-10-28 10:16:56,479 INFO L78 Accepts]: Start accepts. Automaton has 11377 states and 15472 transitions. Word has length 245 [2020-10-28 10:16:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:56,479 INFO L481 AbstractCegarLoop]: Abstraction has 11377 states and 15472 transitions. [2020-10-28 10:16:56,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11377 states and 15472 transitions. [2020-10-28 10:16:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-28 10:16:56,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:56,518 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-28 10:16:56,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:16:56,518 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1234712836, now seen corresponding path program 1 times [2020-10-28 10:16:56,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:56,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252523360] [2020-10-28 10:16:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:56,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:56,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:58,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:01,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:01,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-28 10:17:01,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:17:01,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-28 10:17:01,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:01,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:01,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-28 10:17:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 10:17:01,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:02,058 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:02,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:02,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:02,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:02,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:02,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:02,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:17:02,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:02,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:02,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:17:02,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:02,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:02,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:02,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:17:02,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:02,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:17:02,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:02,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:02,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:02,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:02,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:02,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:17:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:02,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:02,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:02,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:17:02,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:02,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:17:02,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:02,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:02,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:02,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:02,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:02,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:17:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:02,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:02,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 10:17:02,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:02,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 10:17:02,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:02,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:02,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 10:17:02,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 85 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 10:17:02,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252523360] [2020-10-28 10:17:02,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:02,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:17:02,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418253380] [2020-10-28 10:17:02,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:17:02,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:17:02,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:17:02,519 INFO L87 Difference]: Start difference. First operand 11377 states and 15472 transitions. Second operand 5 states. [2020-10-28 10:17:02,944 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:17:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:05,871 INFO L93 Difference]: Finished difference Result 28620 states and 39648 transitions. [2020-10-28 10:17:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:17:05,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2020-10-28 10:17:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:05,957 INFO L225 Difference]: With dead ends: 28620 [2020-10-28 10:17:05,958 INFO L226 Difference]: Without dead ends: 17249 [2020-10-28 10:17:05,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:17:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17249 states. [2020-10-28 10:17:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17249 to 17012. [2020-10-28 10:17:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17012 states. [2020-10-28 10:17:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17012 states to 17012 states and 23260 transitions. [2020-10-28 10:17:06,703 INFO L78 Accepts]: Start accepts. Automaton has 17012 states and 23260 transitions. Word has length 256 [2020-10-28 10:17:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:06,704 INFO L481 AbstractCegarLoop]: Abstraction has 17012 states and 23260 transitions. [2020-10-28 10:17:06,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:17:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 17012 states and 23260 transitions. [2020-10-28 10:17:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 10:17:06,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:06,760 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-28 10:17:06,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:17:06,760 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1378754852, now seen corresponding path program 1 times [2020-10-28 10:17:06,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:06,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433940724] [2020-10-28 10:17:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:06,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:06,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:10,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:11,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:11,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 229 [2020-10-28 10:17:11,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:12,222 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:12,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:12,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:12,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:12,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:12,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:12,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:17:12,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:12,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:12,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:12,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:12,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:12,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:12,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:12,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:12,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:12,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:17:12,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:12,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:17:12,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:12,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:12,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:12,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:12,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:12,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:12,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:17:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:12,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:12,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:17:12,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:17:12,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:12,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:17:12,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:12,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 10:17:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:12,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:12,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:12,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:12,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 10:17:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 63 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:17:12,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433940724] [2020-10-28 10:17:12,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:12,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:17:12,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129072170] [2020-10-28 10:17:12,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:17:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:17:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:17:12,827 INFO L87 Difference]: Start difference. First operand 17012 states and 23260 transitions. Second operand 7 states. [2020-10-28 10:17:13,122 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:17:16,012 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:17:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:16,843 INFO L93 Difference]: Finished difference Result 42766 states and 61170 transitions. [2020-10-28 10:17:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:17:16,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2020-10-28 10:17:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:16,967 INFO L225 Difference]: With dead ends: 42766 [2020-10-28 10:17:16,967 INFO L226 Difference]: Without dead ends: 25760 [2020-10-28 10:17:17,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:17:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25760 states. [2020-10-28 10:17:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25760 to 25542. [2020-10-28 10:17:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25542 states. [2020-10-28 10:17:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25542 states to 25542 states and 34508 transitions. [2020-10-28 10:17:18,099 INFO L78 Accepts]: Start accepts. Automaton has 25542 states and 34508 transitions. Word has length 259 [2020-10-28 10:17:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:18,099 INFO L481 AbstractCegarLoop]: Abstraction has 25542 states and 34508 transitions. [2020-10-28 10:17:18,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:17:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 25542 states and 34508 transitions. [2020-10-28 10:17:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-28 10:17:18,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:18,175 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-10-28 10:17:18,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:17:18,176 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash 203565525, now seen corresponding path program 1 times [2020-10-28 10:17:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:18,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638069862] [2020-10-28 10:17:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:18,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:18,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:23,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:23,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-28 10:17:23,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:17:23,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 10:17:23,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:23,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 10:17:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:17:23,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:23,564 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:23,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:23,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:23,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:23,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:17:23,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:23,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:23,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:23,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:23,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:23,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:23,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:23,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:17:23,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:23,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:17:23,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:23,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:23,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:17:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:23,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:23,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:17:23,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:23,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:17:23,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:23,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:23,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:23,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:23,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:17:23,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:23,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:17:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:23,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 10:17:23,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 10:17:24,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638069862] [2020-10-28 10:17:24,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:24,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:17:24,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917320540] [2020-10-28 10:17:24,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:17:24,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:17:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:17:24,005 INFO L87 Difference]: Start difference. First operand 25542 states and 34508 transitions. Second operand 8 states. [2020-10-28 10:17:24,277 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:17:24,706 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:17:25,782 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:17:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:29,555 INFO L93 Difference]: Finished difference Result 51192 states and 69415 transitions. [2020-10-28 10:17:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 10:17:29,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 263 [2020-10-28 10:17:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:29,649 INFO L225 Difference]: With dead ends: 51192 [2020-10-28 10:17:29,649 INFO L226 Difference]: Without dead ends: 25656 [2020-10-28 10:17:29,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:17:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25656 states. [2020-10-28 10:17:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25656 to 25586. [2020-10-28 10:17:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25586 states. [2020-10-28 10:17:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25586 states to 25586 states and 32297 transitions. [2020-10-28 10:17:30,496 INFO L78 Accepts]: Start accepts. Automaton has 25586 states and 32297 transitions. Word has length 263 [2020-10-28 10:17:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:30,498 INFO L481 AbstractCegarLoop]: Abstraction has 25586 states and 32297 transitions. [2020-10-28 10:17:30,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:17:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 25586 states and 32297 transitions. [2020-10-28 10:17:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-28 10:17:30,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:30,531 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-28 10:17:30,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:17:30,531 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash -876037386, now seen corresponding path program 1 times [2020-10-28 10:17:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:30,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132257150] [2020-10-28 10:17:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:31,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 10:17:31,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:31,433 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:31,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:31,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:31,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:31,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:31,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:31,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:17:31,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:31,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:31,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:31,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:17:31,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:31,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:17:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:31,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 10:17:31,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:17:32,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132257150] [2020-10-28 10:17:32,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:32,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:17:32,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942298002] [2020-10-28 10:17:32,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:17:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:32,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:17:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:17:32,397 INFO L87 Difference]: Start difference. First operand 25586 states and 32297 transitions. Second operand 7 states. [2020-10-28 10:17:33,097 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:17:34,275 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:17:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:37,260 INFO L93 Difference]: Finished difference Result 54609 states and 73855 transitions. [2020-10-28 10:17:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:17:37,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 266 [2020-10-28 10:17:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:37,444 INFO L225 Difference]: With dead ends: 54609 [2020-10-28 10:17:37,444 INFO L226 Difference]: Without dead ends: 29029 [2020-10-28 10:17:37,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:17:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29029 states. [2020-10-28 10:17:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29029 to 27922. [2020-10-28 10:17:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27922 states. [2020-10-28 10:17:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27922 states to 27922 states and 35309 transitions. [2020-10-28 10:17:38,755 INFO L78 Accepts]: Start accepts. Automaton has 27922 states and 35309 transitions. Word has length 266 [2020-10-28 10:17:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:38,756 INFO L481 AbstractCegarLoop]: Abstraction has 27922 states and 35309 transitions. [2020-10-28 10:17:38,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:17:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27922 states and 35309 transitions. [2020-10-28 10:17:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-28 10:17:38,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:38,787 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, 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] [2020-10-28 10:17:38,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:17:38,787 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1886475890, now seen corresponding path program 1 times [2020-10-28 10:17:38,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:38,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452285910] [2020-10-28 10:17:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:39,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:39,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 10:17:39,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:40,099 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:40,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:40,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:40,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:40,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:17:40,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:40,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:17:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:40,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:40,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 10:17:40,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-28 10:17:40,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:40,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 10:17:40,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:17:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:17:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452285910] [2020-10-28 10:17:41,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:41,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:17:41,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886646882] [2020-10-28 10:17:41,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:17:41,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:17:41,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:17:41,144 INFO L87 Difference]: Start difference. First operand 27922 states and 35309 transitions. Second operand 7 states. [2020-10-28 10:17:41,693 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:17:42,795 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:17:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:45,722 INFO L93 Difference]: Finished difference Result 60321 states and 80966 transitions. [2020-10-28 10:17:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:17:45,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 280 [2020-10-28 10:17:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:45,835 INFO L225 Difference]: With dead ends: 60321 [2020-10-28 10:17:45,836 INFO L226 Difference]: Without dead ends: 32405 [2020-10-28 10:17:45,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:17:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32405 states. [2020-10-28 10:17:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32405 to 31308. [2020-10-28 10:17:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31308 states. [2020-10-28 10:17:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31308 states to 31308 states and 39435 transitions. [2020-10-28 10:17:47,009 INFO L78 Accepts]: Start accepts. Automaton has 31308 states and 39435 transitions. Word has length 280 [2020-10-28 10:17:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:47,009 INFO L481 AbstractCegarLoop]: Abstraction has 31308 states and 39435 transitions. [2020-10-28 10:17:47,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:17:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31308 states and 39435 transitions. [2020-10-28 10:17:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-28 10:17:47,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:47,040 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, 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] [2020-10-28 10:17:47,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:17:47,040 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -6132949, now seen corresponding path program 1 times [2020-10-28 10:17:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949572815] [2020-10-28 10:17:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:47,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:47,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:50,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:50,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-28 10:17:50,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:17:50,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2937 [2020-10-28 10:17:50,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:50,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:50,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:50,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 10:17:50,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 10:17:50,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:50,286 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:17:50,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:17:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:50,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:50,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:50,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:17:50,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:50,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:17:50,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:50,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:50,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:17:50,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:50,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:17:50,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:50,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:17:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:17:50,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:17:50,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:17:50,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:50,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 10:17:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:17:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:17:50,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 10:17:50,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:17:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:17:50,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949572815] [2020-10-28 10:17:50,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:17:50,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:17:50,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162885068] [2020-10-28 10:17:50,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:17:50,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:17:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:17:50,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:17:50,799 INFO L87 Difference]: Start difference. First operand 31308 states and 39435 transitions. Second operand 8 states. [2020-10-28 10:17:51,043 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:17:52,102 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:17:52,822 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:17:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:17:56,286 INFO L93 Difference]: Finished difference Result 84593 states and 106880 transitions. [2020-10-28 10:17:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 10:17:56,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 283 [2020-10-28 10:17:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:17:56,415 INFO L225 Difference]: With dead ends: 84593 [2020-10-28 10:17:56,415 INFO L226 Difference]: Without dead ends: 53291 [2020-10-28 10:17:56,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-28 10:17:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53291 states. [2020-10-28 10:17:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53291 to 47213. [2020-10-28 10:17:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47213 states. [2020-10-28 10:17:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47213 states to 47213 states and 58973 transitions. [2020-10-28 10:17:57,973 INFO L78 Accepts]: Start accepts. Automaton has 47213 states and 58973 transitions. Word has length 283 [2020-10-28 10:17:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:17:57,974 INFO L481 AbstractCegarLoop]: Abstraction has 47213 states and 58973 transitions. [2020-10-28 10:17:57,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:17:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 47213 states and 58973 transitions. [2020-10-28 10:17:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-28 10:17:58,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:17:58,218 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-10-28 10:17:58,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:17:58,220 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:17:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:17:58,220 INFO L82 PathProgramCache]: Analyzing trace with hash -994890362, now seen corresponding path program 1 times [2020-10-28 10:17:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:17:58,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963287087] [2020-10-28 10:17:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:17:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:17:58,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:17:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:00,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:00,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 10:18:00,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:18:00,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2118 [2020-10-28 10:18:00,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:00,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:18:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 10:18:00,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:00,771 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:18:00,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:18:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:00,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:00,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:00,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:00,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:18:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:00,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:00,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:18:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:00,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:18:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:00,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:01,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 10:18:01,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:01,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-28 10:18:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:01,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:01,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:01,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 10:18:01,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:01,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 10:18:01,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:01,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:01,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:01,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 10:18:01,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:01,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 161 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 10:18:01,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963287087] [2020-10-28 10:18:01,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:18:01,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:18:01,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611635305] [2020-10-28 10:18:01,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:18:01,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:18:01,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:18:01,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:18:01,272 INFO L87 Difference]: Start difference. First operand 47213 states and 58973 transitions. Second operand 7 states. [2020-10-28 10:18:01,636 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:18:02,014 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:18:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:18:07,984 INFO L93 Difference]: Finished difference Result 105986 states and 140745 transitions. [2020-10-28 10:18:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:18:07,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 311 [2020-10-28 10:18:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:18:08,495 INFO L225 Difference]: With dead ends: 105986 [2020-10-28 10:18:08,495 INFO L226 Difference]: Without dead ends: 59410 [2020-10-28 10:18:08,565 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 [2020-10-28 10:18:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59410 states. [2020-10-28 10:18:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59410 to 57944. [2020-10-28 10:18:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57944 states. [2020-10-28 10:18:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57944 states to 57944 states and 70707 transitions. [2020-10-28 10:18:10,887 INFO L78 Accepts]: Start accepts. Automaton has 57944 states and 70707 transitions. Word has length 311 [2020-10-28 10:18:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:18:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 57944 states and 70707 transitions. [2020-10-28 10:18:10,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:18:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 57944 states and 70707 transitions. [2020-10-28 10:18:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 10:18:10,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:18:10,938 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-10-28 10:18:10,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 10:18:10,938 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:18:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:18:10,939 INFO L82 PathProgramCache]: Analyzing trace with hash 145285601, now seen corresponding path program 1 times [2020-10-28 10:18:10,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:18:10,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548286346] [2020-10-28 10:18:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:18:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:11,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:11,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:12,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:16,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:16,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 10:18:16,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:18:16,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 10:18:16,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:16,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:18:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:18:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 10:18:16,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:16,326 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:18:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:18:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:16,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:16,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:16,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:18:16,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:16,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:18:16,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:16,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:16,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:16,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:16,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:18:16,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:16,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:18:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:16,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:16,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:16,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 10:18:16,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:16,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-28 10:18:16,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:16,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:16,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:16,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:16,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 10:18:16,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:16,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 10:18:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:16,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:16,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:16,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:16,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 10:18:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:16,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:16,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:16,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 10:18:16,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:16,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 10:18:16,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:16,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:16,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:16,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 10:18:16,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:16,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 151 proven. 71 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 10:18:17,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548286346] [2020-10-28 10:18:17,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:18:17,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:18:17,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846629397] [2020-10-28 10:18:17,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:18:17,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:18:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:18:17,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:18:17,013 INFO L87 Difference]: Start difference. First operand 57944 states and 70707 transitions. Second operand 7 states. [2020-10-28 10:18:17,283 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:18:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:18:21,171 INFO L93 Difference]: Finished difference Result 127453 states and 156960 transitions. [2020-10-28 10:18:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:18:21,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 323 [2020-10-28 10:18:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:18:21,393 INFO L225 Difference]: With dead ends: 127453 [2020-10-28 10:18:21,393 INFO L226 Difference]: Without dead ends: 71288 [2020-10-28 10:18:21,455 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 [2020-10-28 10:18:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71288 states. [2020-10-28 10:18:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71288 to 70328. [2020-10-28 10:18:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70328 states. [2020-10-28 10:18:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70328 states to 70328 states and 87098 transitions. [2020-10-28 10:18:23,331 INFO L78 Accepts]: Start accepts. Automaton has 70328 states and 87098 transitions. Word has length 323 [2020-10-28 10:18:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:18:23,331 INFO L481 AbstractCegarLoop]: Abstraction has 70328 states and 87098 transitions. [2020-10-28 10:18:23,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:18:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 70328 states and 87098 transitions. [2020-10-28 10:18:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 10:18:23,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:18:23,379 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:18:23,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 10:18:23,380 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:18:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:18:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2061829790, now seen corresponding path program 1 times [2020-10-28 10:18:23,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:18:23,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092516623] [2020-10-28 10:18:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:18:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:23,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3804 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 10:18:27,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:27,824 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:18:27,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:18:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:27,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:27,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:18:27,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:27,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:18:27,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:27,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:27,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:27,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:18:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:28,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:28,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 10:18:28,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:28,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-28 10:18:28,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:28,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 10:18:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:28,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-28 10:18:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:28,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:28,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 10:18:28,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:28,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-28 10:18:28,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:28,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:28,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:28,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:28,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 10:18:28,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 229 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:18:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092516623] [2020-10-28 10:18:28,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:18:28,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:18:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861264822] [2020-10-28 10:18:28,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:18:28,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:18:28,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:18:28,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:18:28,524 INFO L87 Difference]: Start difference. First operand 70328 states and 87098 transitions. Second operand 7 states. [2020-10-28 10:18:29,492 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:18:30,829 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:18:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:18:36,471 INFO L93 Difference]: Finished difference Result 198010 states and 276601 transitions. [2020-10-28 10:18:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:18:36,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 323 [2020-10-28 10:18:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:18:37,067 INFO L225 Difference]: With dead ends: 198010 [2020-10-28 10:18:37,067 INFO L226 Difference]: Without dead ends: 125509 [2020-10-28 10:18:37,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:18:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125509 states. [2020-10-28 10:18:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125509 to 116400. [2020-10-28 10:18:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116400 states. [2020-10-28 10:18:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116400 states to 116400 states and 140436 transitions. [2020-10-28 10:18:41,803 INFO L78 Accepts]: Start accepts. Automaton has 116400 states and 140436 transitions. Word has length 323 [2020-10-28 10:18:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:18:41,804 INFO L481 AbstractCegarLoop]: Abstraction has 116400 states and 140436 transitions. [2020-10-28 10:18:41,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:18:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 116400 states and 140436 transitions. [2020-10-28 10:18:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-28 10:18:41,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:18:41,868 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:18:41,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 10:18:41,868 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:18:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:18:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1675602390, now seen corresponding path program 1 times [2020-10-28 10:18:41,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:18:41,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208515148] [2020-10-28 10:18:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:18:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:41,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:43,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 10:18:43,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:43,510 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:18:43,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:18:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:43,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:43,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:43,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:18:43,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:43,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:18:43,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:43,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:18:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:18:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:18:43,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:43,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:18:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:43,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:43,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 10:18:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 10:18:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:43,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:43,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:43,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:18:43,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 10:18:43,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:43,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 10:18:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:43,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:43,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-28 10:18:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:44,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:18:44,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 10:18:44,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:18:44,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 10:18:44,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:18:44,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:18:44,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:18:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 10:18:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:18:44,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:18:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 182 proven. 99 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-28 10:18:44,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208515148] [2020-10-28 10:18:44,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:18:44,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:18:44,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190021941] [2020-10-28 10:18:44,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:18:44,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:18:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:18:44,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:18:44,210 INFO L87 Difference]: Start difference. First operand 116400 states and 140436 transitions. Second operand 7 states. [2020-10-28 10:18:44,477 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:18:46,078 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:18:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:18:49,763 INFO L93 Difference]: Finished difference Result 250904 states and 304444 transitions. [2020-10-28 10:18:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:18:49,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 354 [2020-10-28 10:18:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:18:50,226 INFO L225 Difference]: With dead ends: 250904 [2020-10-28 10:18:50,226 INFO L226 Difference]: Without dead ends: 136277 [2020-10-28 10:18:50,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:18:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136277 states. [2020-10-28 10:18:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136277 to 135965. [2020-10-28 10:18:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135965 states. [2020-10-28 10:18:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135965 states to 135965 states and 164806 transitions. [2020-10-28 10:18:54,000 INFO L78 Accepts]: Start accepts. Automaton has 135965 states and 164806 transitions. Word has length 354 [2020-10-28 10:18:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:18:54,000 INFO L481 AbstractCegarLoop]: Abstraction has 135965 states and 164806 transitions. [2020-10-28 10:18:54,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:18:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 135965 states and 164806 transitions. [2020-10-28 10:18:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-10-28 10:18:54,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:18:54,067 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:18:54,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 10:18:54,068 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:18:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:18:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash -992466895, now seen corresponding path program 1 times [2020-10-28 10:18:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:18:54,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502833024] [2020-10-28 10:18:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:18:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:18:54,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:54,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:18:54,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking...