/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=DEEPEST --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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:56:10,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:56:10,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:56:10,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:56:10,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:56:10,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:56:10,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:56:10,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:56:10,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:56:10,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:56:10,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:56:10,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:56:10,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:56:10,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:56:10,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:56:10,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:56:10,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:56:10,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:56:10,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:56:10,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:56:10,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:56:10,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:56:10,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:56:10,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:56:10,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:56:10,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:56:10,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:56:10,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:56:10,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:56:10,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:56:10,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:56:10,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:56:10,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:56:10,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:56:10,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:56:10,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:56:10,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:56:10,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:56:10,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:56:10,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:56:10,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:56:10,358 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 18:56:10,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:56:10,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:56:10,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:56:10,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:56:10,420 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:56:10,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:56:10,420 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:56:10,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:56:10,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:56:10,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:56:10,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:56:10,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:56:10,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:56:10,423 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:56:10,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:56:10,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:56:10,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:56:10,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:56:10,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:56:10,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:56:10,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:56:10,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:56:10,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:56:10,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:56:10,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:56:10,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:56:10,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:56:10,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:56:10,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:56:10,426 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:56:10,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:56:10,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:56:10,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:56:10,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:56:10,994 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:56:10,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label34.c [2020-10-27 18:56:11,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7ad442f6/bcc1767cf19946d3907a470a0855105b/FLAGfa0e48002 [2020-10-27 18:56:12,216 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:56:12,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label34.c [2020-10-27 18:56:12,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7ad442f6/bcc1767cf19946d3907a470a0855105b/FLAGfa0e48002 [2020-10-27 18:56:12,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7ad442f6/bcc1767cf19946d3907a470a0855105b [2020-10-27 18:56:12,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:56:12,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:56:12,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:56:12,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:56:12,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:56:12,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:56:12" (1/1) ... [2020-10-27 18:56:12,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afc6b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:12, skipping insertion in model container [2020-10-27 18:56:12,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:56:12" (1/1) ... [2020-10-27 18:56:12,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:56:12,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:56:14,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:56:14,068 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:56:14,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:56:14,589 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:56:14,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14 WrapperNode [2020-10-27 18:56:14,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:56:14,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:56:14,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:56:14,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:56:14,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... [2020-10-27 18:56:14,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:56:14,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:56:14,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:56:14,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:56:14,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:56:15,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:56:15,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:56:15,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:56:15,018 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:56:15,018 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:56:15,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:56:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:56:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:56:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:56:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:56:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:56:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:56:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:56:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:56:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:56:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:56:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:56:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:56:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:56:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:56:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:56:24,507 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:56:24,507 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:56:24,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:56:24 BoogieIcfgContainer [2020-10-27 18:56:24,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:56:24,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:56:24,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:56:24,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:56:24,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:56:12" (1/3) ... [2020-10-27 18:56:24,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fe4feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:56:24, skipping insertion in model container [2020-10-27 18:56:24,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:56:14" (2/3) ... [2020-10-27 18:56:24,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fe4feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:56:24, skipping insertion in model container [2020-10-27 18:56:24,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:56:24" (3/3) ... [2020-10-27 18:56:24,523 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label34.c [2020-10-27 18:56:24,537 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:56:24,543 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:56:24,556 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:56:24,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:56:24,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:56:24,593 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:56:24,593 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:56:24,593 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:56:24,593 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:56:24,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:56:24,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:56:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:56:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 18:56:24,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:56:24,673 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] [2020-10-27 18:56:24,674 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:56:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:56:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1141615722, now seen corresponding path program 1 times [2020-10-27 18:56:24,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:56:24,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788274918] [2020-10-27 18:56:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:56:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:24,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:25,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:25,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 18:56:25,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:25,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-27 18:56:25,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:25,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:56:25,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:56:25,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 18:56:25,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:56:25,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:56:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:25,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:25,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:56:25,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 18:56:25,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:56:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:56:25,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:25,685 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 18:56:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788274918] [2020-10-27 18:56:25,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:56:25,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:56:25,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836231032] [2020-10-27 18:56:25,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:56:25,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:56:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:56:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:56:25,720 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:56:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:56:39,292 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 18:56:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:56:39,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 18:56:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:56:39,327 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 18:56:39,327 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 18:56:39,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 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 18:56:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 18:56:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 18:56:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 18:56:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 18:56:39,503 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 26 [2020-10-27 18:56:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:56:39,504 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 18:56:39,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:56:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 18:56:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 18:56:39,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:56:39,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:56:39,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:56:39,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:56:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:56:39,512 INFO L82 PathProgramCache]: Analyzing trace with hash 129438122, now seen corresponding path program 1 times [2020-10-27 18:56:39,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:56:39,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018096919] [2020-10-27 18:56:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:56:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:39,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:40,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:41,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:41,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 18:56:41,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:56:41,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-10-27 18:56:41,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:56:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:56:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:56:41,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:56:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:56:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:41,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:41,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:56:41,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:41,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:56:41,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:41,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:56:41,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:41,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:56:41,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:56:41,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:56:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:41,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:41,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:41,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:56:41,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:41,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 18:56:41,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:41,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:56:41,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:41,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:56:41,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:56:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018096919] [2020-10-27 18:56:41,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:56:41,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:56:41,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746185063] [2020-10-27 18:56:41,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:56:41,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:56:41,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:56:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:56:41,746 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 5 states. [2020-10-27 18:56:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:56:56,253 INFO L93 Difference]: Finished difference Result 2886 states and 4481 transitions. [2020-10-27 18:56:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:56:56,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2020-10-27 18:56:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:56:56,274 INFO L225 Difference]: With dead ends: 2886 [2020-10-27 18:56:56,275 INFO L226 Difference]: Without dead ends: 1889 [2020-10-27 18:56:56,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:56:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-27 18:56:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1885. [2020-10-27 18:56:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 18:56:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2588 transitions. [2020-10-27 18:56:56,356 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2588 transitions. Word has length 97 [2020-10-27 18:56:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:56:56,357 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2588 transitions. [2020-10-27 18:56:56,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:56:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2588 transitions. [2020-10-27 18:56:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 18:56:56,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:56:56,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:56:56,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:56:56,363 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:56:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:56:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1718328201, now seen corresponding path program 1 times [2020-10-27 18:56:56,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:56:56,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136756711] [2020-10-27 18:56:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:56:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:56,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:57,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:57,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 18:56:57,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:57,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-27 18:56:57,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:57,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:56:57,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:56:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 18:56:57,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:57,421 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:56:57,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:56:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:57,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:57,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:57,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:56:57,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 18:56:57,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:56:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:56:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:56:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:56:57,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:56:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:56:57,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:56:57,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:56:57,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:56:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:56:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-27 18:56:57,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:56:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:56:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:56:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:56:57,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:56:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:56:57,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136756711] [2020-10-27 18:56:57,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:56:57,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:56:57,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302033103] [2020-10-27 18:56:57,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:56:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:56:57,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:56:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:56:57,995 INFO L87 Difference]: Start difference. First operand 1885 states and 2588 transitions. Second operand 8 states. [2020-10-27 18:56:58,809 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-27 18:57:02,378 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 18:57:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:16,790 INFO L93 Difference]: Finished difference Result 6053 states and 8324 transitions. [2020-10-27 18:57:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 18:57:16,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-27 18:57:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:16,823 INFO L225 Difference]: With dead ends: 6053 [2020-10-27 18:57:16,823 INFO L226 Difference]: Without dead ends: 4174 [2020-10-27 18:57:16,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-27 18:57:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4174 states. [2020-10-27 18:57:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4174 to 3277. [2020-10-27 18:57:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3277 states. [2020-10-27 18:57:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 4196 transitions. [2020-10-27 18:57:16,966 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 4196 transitions. Word has length 100 [2020-10-27 18:57:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:16,968 INFO L481 AbstractCegarLoop]: Abstraction has 3277 states and 4196 transitions. [2020-10-27 18:57:16,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:57:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 4196 transitions. [2020-10-27 18:57:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 18:57:16,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:16,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:57:16,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:57:16,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:16,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2146218017, now seen corresponding path program 1 times [2020-10-27 18:57:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:16,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009608325] [2020-10-27 18:57:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:17,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:22,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:22,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 18:57:22,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:57:22,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 18:57:22,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:57:22,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 18:57:22,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:57:22,277 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:57:22,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:22,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:22,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:22,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:22,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:22,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:57:22,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:22,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:22,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:22,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:22,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:22,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:57:22,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:22,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 18:57:22,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:22,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:22,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:22,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:57:22,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 18:57:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:22,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:22,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:57:22,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:22,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 18:57:22,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:57:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:57:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:57:22,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009608325] [2020-10-27 18:57:22,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:22,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:57:22,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795644962] [2020-10-27 18:57:22,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:57:22,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:57:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:57:22,758 INFO L87 Difference]: Start difference. First operand 3277 states and 4196 transitions. Second operand 7 states. [2020-10-27 18:57:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:38,624 INFO L93 Difference]: Finished difference Result 8961 states and 11770 transitions. [2020-10-27 18:57:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:57:38,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2020-10-27 18:57:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:38,650 INFO L225 Difference]: With dead ends: 8961 [2020-10-27 18:57:38,651 INFO L226 Difference]: Without dead ends: 4315 [2020-10-27 18:57:38,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:57:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2020-10-27 18:57:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4198. [2020-10-27 18:57:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2020-10-27 18:57:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 4909 transitions. [2020-10-27 18:57:38,834 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 4909 transitions. Word has length 169 [2020-10-27 18:57:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:38,835 INFO L481 AbstractCegarLoop]: Abstraction has 4198 states and 4909 transitions. [2020-10-27 18:57:38,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:57:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 4909 transitions. [2020-10-27 18:57:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 18:57:38,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:38,838 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 18:57:38,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:57:38,839 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1164200594, now seen corresponding path program 1 times [2020-10-27 18:57:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:38,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107532623] [2020-10-27 18:57:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:38,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:39,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:40,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:40,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 18:57:40,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:57:40,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1238 [2020-10-27 18:57:40,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:57:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-27 18:57:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:57:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:40,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:40,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:40,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:40,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:40,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:57:40,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:40,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:40,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:40,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:40,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:40,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:57:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:40,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:40,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:40,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:57:40,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:40,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:57:40,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:57:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:57:40,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 18:57:40,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:57:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:40,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:40,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:57:40,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:40,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 18:57:40,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:40,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:40,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:40,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:57:40,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:57:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 18:57:40,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107532623] [2020-10-27 18:57:40,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:57:40,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:57:40,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126394921] [2020-10-27 18:57:40,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:57:40,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:40,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:57:40,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:40,554 INFO L87 Difference]: Start difference. First operand 4198 states and 4909 transitions. Second operand 5 states. [2020-10-27 18:57:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:54,935 INFO L93 Difference]: Finished difference Result 11574 states and 13917 transitions. [2020-10-27 18:57:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:54,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-10-27 18:57:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:54,980 INFO L225 Difference]: With dead ends: 11574 [2020-10-27 18:57:54,980 INFO L226 Difference]: Without dead ends: 7820 [2020-10-27 18:57:54,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:57:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7820 states. [2020-10-27 18:57:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7820 to 7346. [2020-10-27 18:57:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7346 states. [2020-10-27 18:57:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 8733 transitions. [2020-10-27 18:57:55,221 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 8733 transitions. Word has length 182 [2020-10-27 18:57:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:55,222 INFO L481 AbstractCegarLoop]: Abstraction has 7346 states and 8733 transitions. [2020-10-27 18:57:55,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:57:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 8733 transitions. [2020-10-27 18:57:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-27 18:57:55,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:55,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:57:55,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:57:55,227 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:55,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1974835960, now seen corresponding path program 1 times [2020-10-27 18:57:55,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:55,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420995469] [2020-10-27 18:57:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:55,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:55,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:00,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:00,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 18:58:00,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:58:00,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 18:58:00,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:00,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:00,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 18:58:00,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:58:00,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:00,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:00,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:00,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:00,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:00,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:00,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:58:00,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:00,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:00,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:00,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:00,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:00,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:00,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:00,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:58:00,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:00,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:58:00,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:00,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:00,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:58:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:00,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:00,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:58:00,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:00,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 18:58:00,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:00,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:00,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:00,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:58:00,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 18:58:00,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420995469] [2020-10-27 18:58:00,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:00,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:00,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810677844] [2020-10-27 18:58:00,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:00,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:00,784 INFO L87 Difference]: Start difference. First operand 7346 states and 8733 transitions. Second operand 5 states. [2020-10-27 18:58:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:17,582 INFO L93 Difference]: Finished difference Result 15553 states and 18866 transitions. [2020-10-27 18:58:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:17,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-10-27 18:58:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:17,633 INFO L225 Difference]: With dead ends: 15553 [2020-10-27 18:58:17,633 INFO L226 Difference]: Without dead ends: 8653 [2020-10-27 18:58:17,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:58:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8653 states. [2020-10-27 18:58:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8653 to 7348. [2020-10-27 18:58:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7348 states. [2020-10-27 18:58:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7348 states to 7348 states and 8738 transitions. [2020-10-27 18:58:17,918 INFO L78 Accepts]: Start accepts. Automaton has 7348 states and 8738 transitions. Word has length 199 [2020-10-27 18:58:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:17,919 INFO L481 AbstractCegarLoop]: Abstraction has 7348 states and 8738 transitions. [2020-10-27 18:58:17,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:58:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 7348 states and 8738 transitions. [2020-10-27 18:58:17,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 18:58:17,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:17,925 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:58:17,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:58:17,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:17,926 INFO L82 PathProgramCache]: Analyzing trace with hash -297548555, now seen corresponding path program 1 times [2020-10-27 18:58:17,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:17,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931784456] [2020-10-27 18:58:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:18,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:19,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:19,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-27 18:58:19,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:58:19,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1611 [2020-10-27 18:58:19,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:19,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:19,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-27 18:58:19,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:58:19,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:19,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:19,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:19,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:19,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:19,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:19,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:58:19,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:19,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:19,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:19,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:19,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:19,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:58:19,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:19,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 18:58:19,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:19,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:19,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:19,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:19,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:19,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:58:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:19,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:20,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:20,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:58:20,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:20,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 18:58:20,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 18:58:20,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:58:20,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931784456] [2020-10-27 18:58:20,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:20,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:20,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615163545] [2020-10-27 18:58:20,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:20,198 INFO L87 Difference]: Start difference. First operand 7348 states and 8738 transitions. Second operand 5 states. [2020-10-27 18:58:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:34,817 INFO L93 Difference]: Finished difference Result 17316 states and 21287 transitions. [2020-10-27 18:58:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:34,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2020-10-27 18:58:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:34,868 INFO L225 Difference]: With dead ends: 17316 [2020-10-27 18:58:34,869 INFO L226 Difference]: Without dead ends: 10414 [2020-10-27 18:58:34,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:58:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2020-10-27 18:58:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 10403. [2020-10-27 18:58:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10403 states. [2020-10-27 18:58:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10403 states to 10403 states and 12262 transitions. [2020-10-27 18:58:35,159 INFO L78 Accepts]: Start accepts. Automaton has 10403 states and 12262 transitions. Word has length 213 [2020-10-27 18:58:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:35,160 INFO L481 AbstractCegarLoop]: Abstraction has 10403 states and 12262 transitions. [2020-10-27 18:58:35,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:58:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 10403 states and 12262 transitions. [2020-10-27 18:58:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 18:58:35,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:35,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:35,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:58:35,168 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:35,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1668862833, now seen corresponding path program 1 times [2020-10-27 18:58:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:35,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494361744] [2020-10-27 18:58:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:35,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:35,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:35,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:39,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:40,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:40,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-27 18:58:40,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:58:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 18:58:40,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 283 [2020-10-27 18:58:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:58:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:40,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:40,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:40,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:40,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:40,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:40,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:58:40,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:40,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:40,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:40,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:40,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:40,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:58:40,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:40,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 18:58:40,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:40,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:58:40,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:58:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:40,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:40,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:40,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 18:58:40,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:40,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 18:58:40,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:40,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:40,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:40,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:40,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 18:58:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:40,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:40,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:40,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:58:40,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:58:40,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:58:40,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:58:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-27 18:58:41,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494361744] [2020-10-27 18:58:41,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:41,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:41,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707622518] [2020-10-27 18:58:41,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:41,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:41,049 INFO L87 Difference]: Start difference. First operand 10403 states and 12262 transitions. Second operand 5 states. [2020-10-27 18:58:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:55,484 INFO L93 Difference]: Finished difference Result 24316 states and 29427 transitions. [2020-10-27 18:58:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:55,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 295 [2020-10-27 18:58:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:55,545 INFO L225 Difference]: With dead ends: 24316 [2020-10-27 18:58:55,545 INFO L226 Difference]: Without dead ends: 14359 [2020-10-27 18:58:55,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:58:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14359 states. [2020-10-27 18:58:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14359 to 13055. [2020-10-27 18:58:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13055 states. [2020-10-27 18:58:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13055 states to 13055 states and 15433 transitions. [2020-10-27 18:58:55,993 INFO L78 Accepts]: Start accepts. Automaton has 13055 states and 15433 transitions. Word has length 295 [2020-10-27 18:58:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:55,995 INFO L481 AbstractCegarLoop]: Abstraction has 13055 states and 15433 transitions. [2020-10-27 18:58:55,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:58:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13055 states and 15433 transitions. [2020-10-27 18:58:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 18:58:56,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:56,003 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 18:58:56,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:58:56,003 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1060179995, now seen corresponding path program 1 times [2020-10-27 18:58:56,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:56,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273320289] [2020-10-27 18:58:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:56,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:56,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:01,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:01,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-27 18:59:01,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:59:01,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 18:59:01,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-27 18:59:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:59:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:01,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:01,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:59:01,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:59:01,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:01,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:01,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:01,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:59:01,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:01,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 18:59:01,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:01,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:01,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:59:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:01,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:01,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:01,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 18:59:01,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:01,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 18:59:01,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:01,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 18:59:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:01,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:01,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:01,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 18:59:01,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:01,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 18:59:01,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:01,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:01,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:01,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 18:59:01,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 18:59:01,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273320289] [2020-10-27 18:59:01,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:01,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:01,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629391463] [2020-10-27 18:59:01,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:01,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:01,891 INFO L87 Difference]: Start difference. First operand 13055 states and 15433 transitions. Second operand 5 states. [2020-10-27 18:59:02,055 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:59:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:20,766 INFO L93 Difference]: Finished difference Result 32287 states and 39284 transitions. [2020-10-27 18:59:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:20,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 308 [2020-10-27 18:59:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:20,839 INFO L225 Difference]: With dead ends: 32287 [2020-10-27 18:59:20,840 INFO L226 Difference]: Without dead ends: 19678 [2020-10-27 18:59:20,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19678 states. [2020-10-27 18:59:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19678 to 18363. [2020-10-27 18:59:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18363 states. [2020-10-27 18:59:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 22022 transitions. [2020-10-27 18:59:21,284 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 22022 transitions. Word has length 308 [2020-10-27 18:59:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:21,285 INFO L481 AbstractCegarLoop]: Abstraction has 18363 states and 22022 transitions. [2020-10-27 18:59:21,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 22022 transitions. [2020-10-27 18:59:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-27 18:59:21,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:21,296 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:59:21,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:59:21,297 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1581379968, now seen corresponding path program 1 times [2020-10-27 18:59:21,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:21,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517893471] [2020-10-27 18:59:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:21,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:22,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:26,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:26,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-27 18:59:26,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:59:26,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 18:59:26,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 345 [2020-10-27 18:59:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 18:59:26,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:26,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:26,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:26,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:26,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:26,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:26,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:59:26,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:26,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:26,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:26,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:26,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:26,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:26,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:26,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:26,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:59:26,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:26,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 18:59:26,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:26,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:26,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:26,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:26,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:26,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:59:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:26,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:26,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:26,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 18:59:26,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:26,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 18:59:26,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:26,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:26,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 18:59:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:26,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:26,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 18:59:26,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-27 18:59:27,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517893471] [2020-10-27 18:59:27,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:27,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:27,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019815852] [2020-10-27 18:59:27,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:27,087 INFO L87 Difference]: Start difference. First operand 18363 states and 22022 transitions. Second operand 5 states. [2020-10-27 18:59:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:48,520 INFO L93 Difference]: Finished difference Result 41993 states and 51144 transitions. [2020-10-27 18:59:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:48,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 357 [2020-10-27 18:59:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:48,607 INFO L225 Difference]: With dead ends: 41993 [2020-10-27 18:59:48,608 INFO L226 Difference]: Without dead ends: 22752 [2020-10-27 18:59:48,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:59:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22752 states. [2020-10-27 18:59:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22752 to 21447. [2020-10-27 18:59:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21447 states. [2020-10-27 18:59:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21447 states to 21447 states and 25845 transitions. [2020-10-27 18:59:49,252 INFO L78 Accepts]: Start accepts. Automaton has 21447 states and 25845 transitions. Word has length 357 [2020-10-27 18:59:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:49,253 INFO L481 AbstractCegarLoop]: Abstraction has 21447 states and 25845 transitions. [2020-10-27 18:59:49,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 21447 states and 25845 transitions. [2020-10-27 18:59:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-10-27 18:59:49,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:49,264 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-10-27 18:59:49,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:59:49,265 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:49,266 INFO L82 PathProgramCache]: Analyzing trace with hash 520615614, now seen corresponding path program 1 times [2020-10-27 18:59:49,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:49,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078117948] [2020-10-27 18:59:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:49,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:49,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:49,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking...