/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:05:12,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:05:12,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:05:12,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:05:12,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:05:12,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:05:12,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:05:12,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:05:12,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:05:12,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:05:12,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:05:12,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:05:12,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:05:12,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:05:12,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:05:12,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:05:12,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:05:12,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:05:12,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:05:12,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:05:12,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:05:12,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:05:12,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:05:12,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:05:12,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:05:12,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:05:12,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:05:12,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:05:12,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:05:12,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:05:12,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:05:12,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:05:12,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:05:12,488 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 [2020-10-27 00:05:12,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:05:12,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:05:12,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:05:12,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:05:12,545 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:05:12,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:05:12,545 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:05:12,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:05:12,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:05:12,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:05:12,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:05:12,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:05:12,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:05:12,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:05:12,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:05:12,548 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:05:12,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:05:12,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:05:12,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:05:12,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:05:12,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:05:12,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:05:12,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:05:12,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:05:12,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:05:12,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:05:12,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:05:12,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:05:12,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:05:12,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:05:13,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:05:13,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:05:13,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:05:13,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:05:13,054 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:05:13,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label02.c [2020-10-27 00:05:13,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a27a3b31b/3ebc5eed3251438ea7956a014f881e47/FLAG1d7f7f325 [2020-10-27 00:05:14,177 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:05:14,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label02.c [2020-10-27 00:05:14,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a27a3b31b/3ebc5eed3251438ea7956a014f881e47/FLAG1d7f7f325 [2020-10-27 00:05:14,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a27a3b31b/3ebc5eed3251438ea7956a014f881e47 [2020-10-27 00:05:14,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:05:14,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:05:14,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:05:14,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:05:14,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:05:14,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:14" (1/1) ... [2020-10-27 00:05:14,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6372ebc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:14, skipping insertion in model container [2020-10-27 00:05:14,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:14" (1/1) ... [2020-10-27 00:05:14,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:05:14,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:05:15,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:05:15,538 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:05:16,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:05:16,085 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:05:16,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16 WrapperNode [2020-10-27 00:05:16,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:05:16,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:05:16,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:05:16,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:05:16,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (1/1) ... [2020-10-27 00:05:16,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (1/1) ... [2020-10-27 00:05:16,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (1/1) ... [2020-10-27 00:05:16,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (1/1) ... [2020-10-27 00:05:16,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (1/1) ... [2020-10-27 00:05:16,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (1/1) ... [2020-10-27 00:05:16,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (1/1) ... [2020-10-27 00:05:16,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:05:16,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:05:16,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:05:16,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:05:16,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (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 [2020-10-27 00:05:16,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:05:16,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:05:16,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:05:16,580 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:05:16,580 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:05:16,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:05:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:05:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:05:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:05:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:05:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:05:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:05:16,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:05:16,583 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:05:16,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:05:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:05:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:05:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:05:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:05:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:05:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:05:25,985 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:05:25,985 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:05:25,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:25 BoogieIcfgContainer [2020-10-27 00:05:25,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:05:25,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:05:25,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:05:25,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:05:25,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:05:14" (1/3) ... [2020-10-27 00:05:25,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65455568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:25, skipping insertion in model container [2020-10-27 00:05:25,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:16" (2/3) ... [2020-10-27 00:05:25,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65455568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:25, skipping insertion in model container [2020-10-27 00:05:25,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:25" (3/3) ... [2020-10-27 00:05:26,000 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label02.c [2020-10-27 00:05:26,014 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:05:26,021 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:05:26,035 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:05:26,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:05:26,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:05:26,085 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:05:26,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:05:26,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:05:26,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:05:26,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:05:26,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:05:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:05:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 00:05:26,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:05:26,139 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] [2020-10-27 00:05:26,140 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:05:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:05:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash 301619986, now seen corresponding path program 1 times [2020-10-27 00:05:26,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:05:26,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063703076] [2020-10-27 00:05:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:05:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:26,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:27,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:27,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:05:27,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:27,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-27 00:05:27,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:27,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:05:27,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:05:27,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 00:05:27,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:05:27,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:05:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:27,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:27,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:05:27,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:27,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 00:05:27,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:27,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:05:27,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:05:27,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:05:27,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:05:27,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063703076] [2020-10-27 00:05:27,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:05:27,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:05:27,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642371935] [2020-10-27 00:05:27,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:05:27,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:05:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:05:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:05:27,403 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:05:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:05:39,746 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:05:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:05:39,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 00:05:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:05:39,781 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:05:39,781 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:05:39,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:05:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:05:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:05:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:05:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:05:39,940 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 60 [2020-10-27 00:05:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:05:39,941 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:05:39,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:05:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:05:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 00:05:39,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:05:39,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:05:39,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:05:39,956 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:05:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:05:39,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1413360078, now seen corresponding path program 1 times [2020-10-27 00:05:39,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:05:39,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323950857] [2020-10-27 00:05:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:05:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:40,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:40,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:42,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:42,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:05:42,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:05:42,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2445 [2020-10-27 00:05:42,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:05:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:05:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:05:42,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:05:42,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:05:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:42,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:42,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:42,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:05:42,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:42,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:05:42,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:05:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:05:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:05:42,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:42,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:05:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:42,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:42,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:05:42,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:42,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-27 00:05:42,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:42,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:05:42,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:05:42,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:05:42,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:05:43,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323950857] [2020-10-27 00:05:43,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:05:43,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:05:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072391596] [2020-10-27 00:05:43,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:05:43,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:05:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:05:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:05:43,054 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:05:56,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:05:56,225 INFO L93 Difference]: Finished difference Result 2448 states and 3891 transitions. [2020-10-27 00:05:56,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:05:56,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-27 00:05:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:05:56,235 INFO L225 Difference]: With dead ends: 2448 [2020-10-27 00:05:56,235 INFO L226 Difference]: Without dead ends: 1462 [2020-10-27 00:05:56,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:05:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-10-27 00:05:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1433. [2020-10-27 00:05:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-27 00:05:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-27 00:05:56,306 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 131 [2020-10-27 00:05:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:05:56,309 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-27 00:05:56,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:05:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-27 00:05:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 00:05:56,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:05:56,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:05:56,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:05:56,318 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:05:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:05:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash -712958465, now seen corresponding path program 1 times [2020-10-27 00:05:56,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:05:56,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742430443] [2020-10-27 00:05:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:05:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:56,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:56,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:58,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:58,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 00:05:58,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:05:58,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1809 [2020-10-27 00:05:58,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:05:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:05:58,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-27 00:05:58,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:58,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:05:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:58,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:58,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:58,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:05:58,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:58,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:05:58,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:58,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:05:58,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:05:58,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:05:58,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:58,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:05:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:58,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:58,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:58,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:05:58,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:58,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 00:05:58,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:05:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:05:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:05:58,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:05:58,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742430443] [2020-10-27 00:05:58,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:05:58,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:05:58,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207902546] [2020-10-27 00:05:58,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:05:58,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:05:58,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:05:58,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:05:58,760 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 8 states. [2020-10-27 00:05:59,504 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-27 00:06:03,830 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:06:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:06:20,196 INFO L93 Difference]: Finished difference Result 3436 states and 4708 transitions. [2020-10-27 00:06:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:06:20,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2020-10-27 00:06:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:06:20,212 INFO L225 Difference]: With dead ends: 3436 [2020-10-27 00:06:20,213 INFO L226 Difference]: Without dead ends: 1975 [2020-10-27 00:06:20,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:06:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-10-27 00:06:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1924. [2020-10-27 00:06:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1924 states. [2020-10-27 00:06:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2447 transitions. [2020-10-27 00:06:20,284 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2447 transitions. Word has length 134 [2020-10-27 00:06:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:06:20,285 INFO L481 AbstractCegarLoop]: Abstraction has 1924 states and 2447 transitions. [2020-10-27 00:06:20,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:06:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2447 transitions. [2020-10-27 00:06:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-27 00:06:20,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:06:20,289 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, 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] [2020-10-27 00:06:20,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:06:20,289 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:06:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:06:20,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1038819641, now seen corresponding path program 1 times [2020-10-27 00:06:20,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:06:20,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416500647] [2020-10-27 00:06:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:06:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:21,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:21,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-27 00:06:21,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:06:21,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-27 00:06:21,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:06:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:06:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:21,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:21,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:21,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:21,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:21,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:06:21,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:06:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:06:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:21,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:21,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:21,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:06:21,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 00:06:21,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:06:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:06:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:21,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:21,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 00:06:21,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:21,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 00:06:21,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:21,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 00:06:21,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:06:22,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416500647] [2020-10-27 00:06:22,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:22,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:06:22,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392382474] [2020-10-27 00:06:22,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:06:22,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:22,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:06:22,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:06:22,049 INFO L87 Difference]: Start difference. First operand 1924 states and 2447 transitions. Second operand 7 states. [2020-10-27 00:06:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:06:36,057 INFO L93 Difference]: Finished difference Result 4353 states and 5916 transitions. [2020-10-27 00:06:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:06:36,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-10-27 00:06:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:06:36,081 INFO L225 Difference]: With dead ends: 4353 [2020-10-27 00:06:36,081 INFO L226 Difference]: Without dead ends: 2870 [2020-10-27 00:06:36,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:06:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2020-10-27 00:06:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2855. [2020-10-27 00:06:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-10-27 00:06:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 3645 transitions. [2020-10-27 00:06:36,186 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 3645 transitions. Word has length 217 [2020-10-27 00:06:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:06:36,188 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 3645 transitions. [2020-10-27 00:06:36,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:06:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 3645 transitions. [2020-10-27 00:06:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 00:06:36,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:06:36,192 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, 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] [2020-10-27 00:06:36,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:06:36,193 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:06:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:06:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1234777834, now seen corresponding path program 1 times [2020-10-27 00:06:36,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:06:36,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306195171] [2020-10-27 00:06:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:06:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:36,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:37,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:39,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:39,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 00:06:39,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:06:39,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3728 [2020-10-27 00:06:39,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:06:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:06:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:06:39,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:40,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:40,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:40,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:40,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:40,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:06:40,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:06:40,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:40,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:40,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:40,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:06:40,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:40,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 00:06:40,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:40,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:06:40,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:40,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:06:40,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:40,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:06:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:40,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:40,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:40,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:06:40,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:40,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 00:06:40,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:40,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:40,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:40,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:06:40,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 173 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:06:40,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306195171] [2020-10-27 00:06:40,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:40,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:06:40,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171592130] [2020-10-27 00:06:40,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:06:40,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:06:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:06:40,816 INFO L87 Difference]: Start difference. First operand 2855 states and 3645 transitions. Second operand 10 states. [2020-10-27 00:06:41,001 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 00:07:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:03,898 INFO L93 Difference]: Finished difference Result 7828 states and 10914 transitions. [2020-10-27 00:07:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 00:07:03,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 222 [2020-10-27 00:07:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:03,941 INFO L225 Difference]: With dead ends: 7828 [2020-10-27 00:07:03,941 INFO L226 Difference]: Without dead ends: 5414 [2020-10-27 00:07:03,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 00:07:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2020-10-27 00:07:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 5170. [2020-10-27 00:07:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5170 states. [2020-10-27 00:07:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 6241 transitions. [2020-10-27 00:07:04,153 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 6241 transitions. Word has length 222 [2020-10-27 00:07:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:04,154 INFO L481 AbstractCegarLoop]: Abstraction has 5170 states and 6241 transitions. [2020-10-27 00:07:04,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:07:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 6241 transitions. [2020-10-27 00:07:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 00:07:04,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:04,160 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:07:04,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:07:04,160 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -650886624, now seen corresponding path program 1 times [2020-10-27 00:07:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:04,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917406644] [2020-10-27 00:07:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:04,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:04,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:04,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:09,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:09,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 00:07:09,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:07:09,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 00:07:09,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:07:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:07:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 00:07:09,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:09,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:09,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:09,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:09,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:07:09,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:07:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:07:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:09,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:09,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:09,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:09,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:07:09,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:09,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 00:07:09,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:09,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:07:09,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:09,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:07:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:09,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:09,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:09,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:09,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:07:09,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:07:09,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 00:07:09,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:07:09,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 133 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:07:09,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917406644] [2020-10-27 00:07:09,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:09,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:07:09,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671018046] [2020-10-27 00:07:09,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:07:09,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:09,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:07:09,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:07:09,947 INFO L87 Difference]: Start difference. First operand 5170 states and 6241 transitions. Second operand 6 states. [2020-10-27 00:07:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:27,914 INFO L93 Difference]: Finished difference Result 10839 states and 13774 transitions. [2020-10-27 00:07:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:07:27,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 233 [2020-10-27 00:07:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:27,950 INFO L225 Difference]: With dead ends: 10839 [2020-10-27 00:07:27,950 INFO L226 Difference]: Without dead ends: 6110 [2020-10-27 00:07:27,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:07:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2020-10-27 00:07:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 6050. [2020-10-27 00:07:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6050 states. [2020-10-27 00:07:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 7699 transitions. [2020-10-27 00:07:28,149 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 7699 transitions. Word has length 233 [2020-10-27 00:07:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:28,149 INFO L481 AbstractCegarLoop]: Abstraction has 6050 states and 7699 transitions. [2020-10-27 00:07:28,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:07:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 7699 transitions. [2020-10-27 00:07:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 00:07:28,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:28,157 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:07:28,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:07:28,157 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:28,158 INFO L82 PathProgramCache]: Analyzing trace with hash 332867484, now seen corresponding path program 1 times [2020-10-27 00:07:28,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:28,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999496110] [2020-10-27 00:07:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:28,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:28,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:28,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:32,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:33,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-27 00:07:33,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:07:33,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 00:07:33,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:33,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:07:33,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:07:33,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 00:07:33,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:33,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:33,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:33,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:33,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:07:33,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:33,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:07:33,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:07:33,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:33,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:33,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:07:33,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:33,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 00:07:33,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:07:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:07:33,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:34,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:07:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:34,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:07:34,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:34,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 00:07:34,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:07:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:34,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:07:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:34,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:34,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:34,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:07:34,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:34,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 00:07:34,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:34,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:34,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:34,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:07:34,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 237 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:07:34,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999496110] [2020-10-27 00:07:34,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:34,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:07:34,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600505804] [2020-10-27 00:07:34,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 00:07:34,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 00:07:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:07:34,799 INFO L87 Difference]: Start difference. First operand 6050 states and 7699 transitions. Second operand 11 states. [2020-10-27 00:07:35,025 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 00:07:41,510 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:07:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:55,252 INFO L93 Difference]: Finished difference Result 14135 states and 18904 transitions. [2020-10-27 00:07:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 00:07:55,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 308 [2020-10-27 00:07:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:55,316 INFO L225 Difference]: With dead ends: 14135 [2020-10-27 00:07:55,316 INFO L226 Difference]: Without dead ends: 8526 [2020-10-27 00:07:55,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:07:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2020-10-27 00:07:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 6066. [2020-10-27 00:07:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6066 states. [2020-10-27 00:07:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 7716 transitions. [2020-10-27 00:07:55,574 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 7716 transitions. Word has length 308 [2020-10-27 00:07:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:55,575 INFO L481 AbstractCegarLoop]: Abstraction has 6066 states and 7716 transitions. [2020-10-27 00:07:55,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 00:07:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 7716 transitions. [2020-10-27 00:07:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 00:07:55,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:55,583 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:07:55,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:07:55,584 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash -668232, now seen corresponding path program 1 times [2020-10-27 00:07:55,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:55,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971548511] [2020-10-27 00:07:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:55,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:00,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:00,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-27 00:08:00,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:08:00,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 00:08:00,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:08:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:08:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-27 00:08:00,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:00,952 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:08:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:00,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:00,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:00,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:00,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:00,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:08:00,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:00,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:00,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:01,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:01,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:01,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:01,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:08:01,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:01,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 00:08:01,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:01,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:01,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:01,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:08:01,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:01,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:08:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:01,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:01,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:01,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:01,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:08:01,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:08:01,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 00:08:01,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:08:01,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:01,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:08:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:01,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:01,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:08:01,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:01,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:08:01,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:08:01,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 313 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 00:08:01,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971548511] [2020-10-27 00:08:01,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:01,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:08:01,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2982502] [2020-10-27 00:08:01,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:08:01,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:08:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:08:01,857 INFO L87 Difference]: Start difference. First operand 6066 states and 7716 transitions. Second operand 8 states. [2020-10-27 00:08:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:16,798 INFO L93 Difference]: Finished difference Result 11718 states and 14939 transitions. [2020-10-27 00:08:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:08:16,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 310 [2020-10-27 00:08:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:16,820 INFO L225 Difference]: With dead ends: 11718 [2020-10-27 00:08:16,820 INFO L226 Difference]: Without dead ends: 6093 [2020-10-27 00:08:16,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:08:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6093 states. [2020-10-27 00:08:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6093 to 5194. [2020-10-27 00:08:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5194 states. [2020-10-27 00:08:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 6259 transitions. [2020-10-27 00:08:16,966 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 6259 transitions. Word has length 310 [2020-10-27 00:08:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:16,967 INFO L481 AbstractCegarLoop]: Abstraction has 5194 states and 6259 transitions. [2020-10-27 00:08:16,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:08:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 6259 transitions. [2020-10-27 00:08:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-27 00:08:16,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:16,976 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, 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, 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] [2020-10-27 00:08:16,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:08:16,976 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:16,977 INFO L82 PathProgramCache]: Analyzing trace with hash -227831239, now seen corresponding path program 1 times [2020-10-27 00:08:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:16,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390566898] [2020-10-27 00:08:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:17,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:18,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:21,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:22,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:22,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-27 00:08:22,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:08:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 00:08:22,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:08:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:08:22,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:22,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:22,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:22,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:22,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:22,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:08:22,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:22,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:22,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:22,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:08:22,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:22,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 00:08:22,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:22,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:22,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:22,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:08:22,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:22,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:08:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:22,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:22,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:22,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:08:22,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:22,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 00:08:22,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:08:22,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:22,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 00:08:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:22,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:22,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:22,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:08:22,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:22,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:08:22,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:22,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:22,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:08:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:22,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 244 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:08:22,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390566898] [2020-10-27 00:08:22,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:22,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:08:22,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663609449] [2020-10-27 00:08:22,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:08:22,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:08:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:08:22,806 INFO L87 Difference]: Start difference. First operand 5194 states and 6259 transitions. Second operand 7 states. [2020-10-27 00:08:29,784 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:08:49,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:49,215 INFO L93 Difference]: Finished difference Result 14359 states and 17915 transitions. [2020-10-27 00:08:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:08:49,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 329 [2020-10-27 00:08:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:49,257 INFO L225 Difference]: With dead ends: 14359 [2020-10-27 00:08:49,258 INFO L226 Difference]: Without dead ends: 9606 [2020-10-27 00:08:49,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:08:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9606 states. [2020-10-27 00:08:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9606 to 8514. [2020-10-27 00:08:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8514 states. [2020-10-27 00:08:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 10146 transitions. [2020-10-27 00:08:49,486 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 10146 transitions. Word has length 329 [2020-10-27 00:08:49,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:49,487 INFO L481 AbstractCegarLoop]: Abstraction has 8514 states and 10146 transitions. [2020-10-27 00:08:49,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:08:49,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 10146 transitions. [2020-10-27 00:08:49,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-27 00:08:49,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:49,495 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, 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, 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] [2020-10-27 00:08:49,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:08:49,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:49,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1989745923, now seen corresponding path program 1 times [2020-10-27 00:08:49,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:49,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035951836] [2020-10-27 00:08:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:49,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:49,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:49,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:50,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:51,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:54,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:54,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-27 00:08:54,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:08:54,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 00:08:54,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:08:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:08:54,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:54,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:54,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:54,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:54,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:54,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:54,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:08:54,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:54,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:54,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:54,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:54,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:54,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:08:54,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:54,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 00:08:54,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:08:54,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:54,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:08:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:55,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:08:55,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:55,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:08:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:55,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:55,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:55,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:08:55,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:55,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 00:08:55,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:55,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:55,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:08:55,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:55,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 244 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:08:55,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035951836] [2020-10-27 00:08:55,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:55,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:08:55,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914218586] [2020-10-27 00:08:55,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:08:55,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:08:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:08:55,636 INFO L87 Difference]: Start difference. First operand 8514 states and 10146 transitions. Second operand 7 states. [2020-10-27 00:08:56,598 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70