/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/Problem15_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:26:06,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:26:06,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:26:06,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:26:06,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:26:06,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:26:06,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:26:06,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:26:06,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:26:06,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:26:06,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:26:06,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:26:06,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:26:06,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:26:06,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:26:06,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:26:06,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:26:06,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:26:06,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:26:06,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:26:06,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:26:06,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:26:06,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:26:06,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:26:06,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:26:06,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:26:06,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:26:06,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:26:06,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:26:06,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:26:06,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:26:06,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:26:06,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:26:06,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:26:06,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:26:06,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:26:06,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:26:06,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:26:06,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:26:06,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:26:06,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:26:06,533 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 18:26:06,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:26:06,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:26:06,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:26:06,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:26:06,593 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:26:06,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:26:06,593 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:26:06,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:26:06,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:26:06,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:26:06,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:26:06,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:26:06,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:26:06,595 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:26:06,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:26:06,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:26:06,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:26:06,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:26:06,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:26:06,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:26:06,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:26:06,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:26:06,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:26:06,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:26:06,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:26:06,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:26:06,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:26:06,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:26:06,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:26:06,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:26:06,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:26:07,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:26:07,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:26:07,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:26:07,019 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:26:07,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2020-10-27 18:26:07,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62c25089a/8683d99a1abc44a8a703bc81a152e126/FLAG9a4d1a3bb [2020-10-27 18:26:08,063 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:26:08,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2020-10-27 18:26:08,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62c25089a/8683d99a1abc44a8a703bc81a152e126/FLAG9a4d1a3bb [2020-10-27 18:26:08,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62c25089a/8683d99a1abc44a8a703bc81a152e126 [2020-10-27 18:26:08,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:26:08,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:26:08,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:26:08,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:26:08,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:26:08,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:26:08" (1/1) ... [2020-10-27 18:26:08,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334dbfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:08, skipping insertion in model container [2020-10-27 18:26:08,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:26:08" (1/1) ... [2020-10-27 18:26:08,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:26:08,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:26:09,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:26:09,213 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:26:09,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:26:09,534 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:26:09,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09 WrapperNode [2020-10-27 18:26:09,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:26:09,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:26:09,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:26:09,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:26:09,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... [2020-10-27 18:26:09,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... [2020-10-27 18:26:09,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... [2020-10-27 18:26:09,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... [2020-10-27 18:26:09,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... [2020-10-27 18:26:09,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... [2020-10-27 18:26:09,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... [2020-10-27 18:26:09,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:26:09,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:26:09,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:26:09,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:26:09,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:26:09,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:26:09,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:26:09,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:26:09,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:26:09,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:26:09,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:26:09,901 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:26:09,901 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:26:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:26:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:26:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:26:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:26:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:26:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:26:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:26:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:26:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:26:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:26:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:26:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:26:09,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:26:13,302 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:26:13,303 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:26:13,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:26:13 BoogieIcfgContainer [2020-10-27 18:26:13,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:26:13,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:26:13,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:26:13,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:26:13,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:26:08" (1/3) ... [2020-10-27 18:26:13,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0993a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:26:13, skipping insertion in model container [2020-10-27 18:26:13,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:09" (2/3) ... [2020-10-27 18:26:13,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0993a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:26:13, skipping insertion in model container [2020-10-27 18:26:13,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:26:13" (3/3) ... [2020-10-27 18:26:13,320 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label28.c [2020-10-27 18:26:13,333 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:26:13,339 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:26:13,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:26:13,386 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:26:13,386 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:26:13,386 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:26:13,386 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:26:13,386 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:26:13,386 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:26:13,387 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:26:13,387 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:26:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:26:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 18:26:13,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:13,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:26:13,425 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash 287999495, now seen corresponding path program 1 times [2020-10-27 18:26:13,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:13,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440198146] [2020-10-27 18:26:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:13,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:14,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:14,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 18:26:14,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:14,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-27 18:26:14,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:26:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:26:14,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 18:26:14,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:26:14,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:14,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:14,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:14,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:14,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:14,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 18:26:14,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:26:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:14,503 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 18:26:14,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440198146] [2020-10-27 18:26:14,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:26:14,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:26:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692673365] [2020-10-27 18:26:14,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:26:14,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:26:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:26:14,540 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:26:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:23,147 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-27 18:26:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:23,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 18:26:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:23,171 INFO L225 Difference]: With dead ends: 1208 [2020-10-27 18:26:23,172 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 18:26:23,184 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 18:26:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 18:26:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-27 18:26:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-27 18:26:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-27 18:26:23,317 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 39 [2020-10-27 18:26:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:23,318 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-27 18:26:23,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:26:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-27 18:26:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 18:26:23,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:23,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:23,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:26:23,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1496870164, now seen corresponding path program 1 times [2020-10-27 18:26:23,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:23,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53466236] [2020-10-27 18:26:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:23,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:24,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:25,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:25,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:26:25,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:26:25,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-27 18:26:25,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:26:25,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 18:26:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:26:25,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:25,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:25,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:25,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:25,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:25,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:26:25,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:25,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:25,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:25,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:25,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:25,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:26:25,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:25,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 18:26:25,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:25,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:25,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:25,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:26:25,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:25,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53466236] [2020-10-27 18:26:25,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:25,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:25,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323413062] [2020-10-27 18:26:25,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:25,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:25,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:25,578 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 5 states. [2020-10-27 18:26:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:37,063 INFO L93 Difference]: Finished difference Result 2020 states and 2974 transitions. [2020-10-27 18:26:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:37,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-27 18:26:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:37,076 INFO L225 Difference]: With dead ends: 2020 [2020-10-27 18:26:37,076 INFO L226 Difference]: Without dead ends: 1329 [2020-10-27 18:26:37,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 18:26:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2020-10-27 18:26:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1325. [2020-10-27 18:26:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-10-27 18:26:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1880 transitions. [2020-10-27 18:26:37,145 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1880 transitions. Word has length 118 [2020-10-27 18:26:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:37,146 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 1880 transitions. [2020-10-27 18:26:37,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:26:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1880 transitions. [2020-10-27 18:26:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 18:26:37,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:37,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:37,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:26:37,153 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1079989428, now seen corresponding path program 1 times [2020-10-27 18:26:37,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:37,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099701341] [2020-10-27 18:26:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:37,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:37,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:38,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:38,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 18:26:38,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:26:38,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1207 [2020-10-27 18:26:38,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 18:26:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 18:26:38,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:38,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:38,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:38,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:38,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:38,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:26:38,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:38,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:38,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:38,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:38,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:38,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:38,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:38,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:26:38,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 18:26:38,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:26:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:38,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099701341] [2020-10-27 18:26:38,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:38,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:38,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277544801] [2020-10-27 18:26:38,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:38,833 INFO L87 Difference]: Start difference. First operand 1325 states and 1880 transitions. Second operand 5 states. [2020-10-27 18:26:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:47,576 INFO L93 Difference]: Finished difference Result 3276 states and 4851 transitions. [2020-10-27 18:26:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:47,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-27 18:26:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:47,597 INFO L225 Difference]: With dead ends: 3276 [2020-10-27 18:26:47,597 INFO L226 Difference]: Without dead ends: 1957 [2020-10-27 18:26:47,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 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 18:26:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2020-10-27 18:26:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1953. [2020-10-27 18:26:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-10-27 18:26:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2620 transitions. [2020-10-27 18:26:47,682 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2620 transitions. Word has length 122 [2020-10-27 18:26:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:47,683 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 2620 transitions. [2020-10-27 18:26:47,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:26:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2620 transitions. [2020-10-27 18:26:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 18:26:47,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:47,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:47,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:26:47,689 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1964542258, now seen corresponding path program 1 times [2020-10-27 18:26:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:47,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313735409] [2020-10-27 18:26:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:47,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:48,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:49,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:49,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 18:26:49,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:26:49,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1324 [2020-10-27 18:26:49,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 18:26:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 18:26:49,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 18:26:49,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:49,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:49,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:49,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:49,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:26:49,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:49,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:49,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:49,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:49,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:49,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:49,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:49,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:49,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:26:49,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:49,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 18:26:49,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 18:26:49,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:49,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313735409] [2020-10-27 18:26:49,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:49,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:49,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910210316] [2020-10-27 18:26:49,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:49,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:49,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:49,552 INFO L87 Difference]: Start difference. First operand 1953 states and 2620 transitions. Second operand 5 states. [2020-10-27 18:26:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:57,620 INFO L93 Difference]: Finished difference Result 4524 states and 6338 transitions. [2020-10-27 18:26:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:57,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-27 18:26:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:57,642 INFO L225 Difference]: With dead ends: 4524 [2020-10-27 18:26:57,643 INFO L226 Difference]: Without dead ends: 2577 [2020-10-27 18:26:57,648 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 18:26:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2020-10-27 18:26:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2573. [2020-10-27 18:26:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-10-27 18:26:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3443 transitions. [2020-10-27 18:26:57,736 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3443 transitions. Word has length 155 [2020-10-27 18:26:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:57,737 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 3443 transitions. [2020-10-27 18:26:57,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:26:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3443 transitions. [2020-10-27 18:26:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 18:26:57,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:57,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:57,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:26:57,741 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1260014292, now seen corresponding path program 1 times [2020-10-27 18:26:57,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:57,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685395614] [2020-10-27 18:26:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:57,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:59,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:59,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 18:26:59,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:26:59,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-27 18:26:59,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 18:26:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 18:26:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:59,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:59,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:59,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:59,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:26:59,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:26:59,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:59,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:59,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:26:59,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 18:26:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:26:59,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:59,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685395614] [2020-10-27 18:26:59,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:59,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:59,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387902302] [2020-10-27 18:26:59,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:59,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:59,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:59,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:59,657 INFO L87 Difference]: Start difference. First operand 2573 states and 3443 transitions. Second operand 5 states. [2020-10-27 18:27:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:07,971 INFO L93 Difference]: Finished difference Result 5773 states and 8022 transitions. [2020-10-27 18:27:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:07,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-27 18:27:07,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:08,000 INFO L225 Difference]: With dead ends: 5773 [2020-10-27 18:27:08,001 INFO L226 Difference]: Without dead ends: 3206 [2020-10-27 18:27:08,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 18:27:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2020-10-27 18:27:08,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3199. [2020-10-27 18:27:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-27 18:27:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4234 transitions. [2020-10-27 18:27:08,117 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4234 transitions. Word has length 168 [2020-10-27 18:27:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:08,118 INFO L481 AbstractCegarLoop]: Abstraction has 3199 states and 4234 transitions. [2020-10-27 18:27:08,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4234 transitions. [2020-10-27 18:27:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 18:27:08,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:08,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:08,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:27:08,124 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1999795336, now seen corresponding path program 1 times [2020-10-27 18:27:08,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:08,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042460049] [2020-10-27 18:27:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:08,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:08,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:08,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:09,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:09,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 18:27:09,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:27:09,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1757 [2020-10-27 18:27:09,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:09,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:09,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 18:27:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 18:27:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:10,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:10,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:10,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:10,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:10,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:10,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:27:10,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:10,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:10,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:10,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:10,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:10,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:27:10,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:10,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 18:27:10,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 18:27:10,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:27:10,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042460049] [2020-10-27 18:27:10,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:10,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:10,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30566437] [2020-10-27 18:27:10,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:10,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:10,656 INFO L87 Difference]: Start difference. First operand 3199 states and 4234 transitions. Second operand 5 states. [2020-10-27 18:27:11,916 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-27 18:27:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:17,110 INFO L93 Difference]: Finished difference Result 6419 states and 8517 transitions. [2020-10-27 18:27:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:17,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-10-27 18:27:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:17,136 INFO L225 Difference]: With dead ends: 6419 [2020-10-27 18:27:17,136 INFO L226 Difference]: Without dead ends: 3203 [2020-10-27 18:27:17,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 18:27:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2020-10-27 18:27:17,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 3199. [2020-10-27 18:27:17,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-27 18:27:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4230 transitions. [2020-10-27 18:27:17,254 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4230 transitions. Word has length 182 [2020-10-27 18:27:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:17,255 INFO L481 AbstractCegarLoop]: Abstraction has 3199 states and 4230 transitions. [2020-10-27 18:27:17,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4230 transitions. [2020-10-27 18:27:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 18:27:17,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:17,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:27:17,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:27:17,262 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1380088137, now seen corresponding path program 1 times [2020-10-27 18:27:17,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:17,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114303568] [2020-10-27 18:27:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:17,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:20,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:20,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:22,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:22,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-27 18:27:22,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:27:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 18:27:22,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-27 18:27:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:27:22,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:22,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:22,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:22,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:22,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:27:22,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:22,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:22,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:22,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:22,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:27:22,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:22,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:27:22,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:22,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:22,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:22,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:22,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:22,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 18:27:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:22,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:22,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 18:27:22,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 18:27:22,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 18:27:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-27 18:27:23,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114303568] [2020-10-27 18:27:23,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:23,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:23,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734859534] [2020-10-27 18:27:23,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:23,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:23,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:23,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:23,028 INFO L87 Difference]: Start difference. First operand 3199 states and 4230 transitions. Second operand 5 states. [2020-10-27 18:27:25,015 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:27:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:33,980 INFO L93 Difference]: Finished difference Result 6425 states and 8513 transitions. [2020-10-27 18:27:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:33,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2020-10-27 18:27:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:34,003 INFO L225 Difference]: With dead ends: 6425 [2020-10-27 18:27:34,003 INFO L226 Difference]: Without dead ends: 3203 [2020-10-27 18:27:34,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 18:27:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2020-10-27 18:27:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 3199. [2020-10-27 18:27:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-27 18:27:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4227 transitions. [2020-10-27 18:27:34,105 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4227 transitions. Word has length 218 [2020-10-27 18:27:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:34,106 INFO L481 AbstractCegarLoop]: Abstraction has 3199 states and 4227 transitions. [2020-10-27 18:27:34,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4227 transitions. [2020-10-27 18:27:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 18:27:34,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:34,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:34,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:27:34,112 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:34,113 INFO L82 PathProgramCache]: Analyzing trace with hash -95127894, now seen corresponding path program 1 times [2020-10-27 18:27:34,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:34,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827184623] [2020-10-27 18:27:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:34,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:35,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:36,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:36,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 18:27:36,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:27:36,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2748 [2020-10-27 18:27:36,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 195 [2020-10-27 18:27:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 18:27:36,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:27:37,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:37,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:37,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:37,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:27:37,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:37,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:37,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:37,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:37,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:37,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 18:27:37,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:37,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-27 18:27:37,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-27 18:27:37,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:27:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827184623] [2020-10-27 18:27:37,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:37,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:37,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735847121] [2020-10-27 18:27:37,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:37,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:37,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:37,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:37,709 INFO L87 Difference]: Start difference. First operand 3199 states and 4227 transitions. Second operand 5 states. [2020-10-27 18:27:38,374 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:27:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:50,409 INFO L93 Difference]: Finished difference Result 9502 states and 12778 transitions. [2020-10-27 18:27:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:50,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-27 18:27:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:50,445 INFO L225 Difference]: With dead ends: 9502 [2020-10-27 18:27:50,445 INFO L226 Difference]: Without dead ends: 6309 [2020-10-27 18:27:50,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 18:27:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6309 states. [2020-10-27 18:27:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6309 to 4770. [2020-10-27 18:27:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4770 states. [2020-10-27 18:27:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 6034 transitions. [2020-10-27 18:27:50,627 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 6034 transitions. Word has length 224 [2020-10-27 18:27:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:50,628 INFO L481 AbstractCegarLoop]: Abstraction has 4770 states and 6034 transitions. [2020-10-27 18:27:50,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 6034 transitions. [2020-10-27 18:27:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 18:27:50,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:50,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:27:50,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:27:50,637 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2116617094, now seen corresponding path program 1 times [2020-10-27 18:27:50,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:50,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112381978] [2020-10-27 18:27:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:50,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:51,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:54,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:54,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 18:27:54,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:27:54,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3805 [2020-10-27 18:27:54,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:54,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:54,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 204 [2020-10-27 18:27:54,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:27:54,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:54,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:54,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:54,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:54,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:54,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:54,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:27:54,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:54,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:54,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:54,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:54,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:54,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:54,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:54,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:54,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:27:54,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:54,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 18:27:54,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:54,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:54,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 18:27:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:54,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:54,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:27:54,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 18:27:54,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:54,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:54,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:54,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:27:54,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 18:27:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112381978] [2020-10-27 18:27:55,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:55,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167806767] [2020-10-27 18:27:55,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:55,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:55,099 INFO L87 Difference]: Start difference. First operand 4770 states and 6034 transitions. Second operand 5 states. [2020-10-27 18:27:57,976 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-27 18:28:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:03,390 INFO L93 Difference]: Finished difference Result 9554 states and 12125 transitions. [2020-10-27 18:28:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:28:03,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 231 [2020-10-27 18:28:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:03,423 INFO L225 Difference]: With dead ends: 9554 [2020-10-27 18:28:03,423 INFO L226 Difference]: Without dead ends: 4774 [2020-10-27 18:28:03,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 18:28:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2020-10-27 18:28:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 4770. [2020-10-27 18:28:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4770 states. [2020-10-27 18:28:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 6028 transitions. [2020-10-27 18:28:03,584 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 6028 transitions. Word has length 231 [2020-10-27 18:28:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:03,585 INFO L481 AbstractCegarLoop]: Abstraction has 4770 states and 6028 transitions. [2020-10-27 18:28:03,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:28:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 6028 transitions. [2020-10-27 18:28:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-27 18:28:03,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:03,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:28:03,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:28:03,595 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:03,595 INFO L82 PathProgramCache]: Analyzing trace with hash 735266471, now seen corresponding path program 1 times [2020-10-27 18:28:03,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:03,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117021474] [2020-10-27 18:28:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:03,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:03,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:04,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:06,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:08,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:08,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 18:28:08,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:28:08,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 18:28:08,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-10-27 18:28:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 18:28:08,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:28:08,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:08,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:08,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:08,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:08,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:08,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:28:08,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:08,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:08,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:08,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:08,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:08,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:28:08,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:08,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 18:28:08,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:08,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:09,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-27 18:28:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:09,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:09,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:09,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 18:28:09,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:28:09,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 18:28:09,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-27 18:28:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:28:09,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 18:28:09,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117021474] [2020-10-27 18:28:09,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:09,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:28:09,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433628380] [2020-10-27 18:28:09,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:28:09,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:28:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:28:09,230 INFO L87 Difference]: Start difference. First operand 4770 states and 6028 transitions. Second operand 6 states. [2020-10-27 18:28:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:26,684 INFO L93 Difference]: Finished difference Result 14181 states and 18708 transitions. [2020-10-27 18:28:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:28:26,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 235 [2020-10-27 18:28:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:26,739 INFO L225 Difference]: With dead ends: 14181 [2020-10-27 18:28:26,739 INFO L226 Difference]: Without dead ends: 9417 [2020-10-27 18:28:26,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:28:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2020-10-27 18:28:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 9411. [2020-10-27 18:28:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9411 states. [2020-10-27 18:28:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9411 states to 9411 states and 11503 transitions. [2020-10-27 18:28:27,051 INFO L78 Accepts]: Start accepts. Automaton has 9411 states and 11503 transitions. Word has length 235 [2020-10-27 18:28:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:27,052 INFO L481 AbstractCegarLoop]: Abstraction has 9411 states and 11503 transitions. [2020-10-27 18:28:27,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:28:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 9411 states and 11503 transitions. [2020-10-27 18:28:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-27 18:28:27,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:27,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:28:27,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:28:27,069 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1093272556, now seen corresponding path program 1 times [2020-10-27 18:28:27,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978518435] [2020-10-27 18:28:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:27,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:27,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:30,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:30,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:32,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 261 [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 18:28:32,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:32,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:32,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:32,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:32,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:32,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:28:32,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:32,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:32,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:32,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:32,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:32,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:32,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:32,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:32,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:28:32,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:32,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:28:32,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:32,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:32,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:32,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:32,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:32,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 18:28:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:32,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:32,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:32,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 18:28:32,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:32,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 18:28:32,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-27 18:28:32,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-27 18:28:32,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978518435] [2020-10-27 18:28:32,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:32,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:28:32,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549329767] [2020-10-27 18:28:32,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:28:32,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:32,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:28:32,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:28:32,864 INFO L87 Difference]: Start difference. First operand 9411 states and 11503 transitions. Second operand 5 states. [2020-10-27 18:28:36,079 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 18:28:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:40,491 INFO L93 Difference]: Finished difference Result 18844 states and 23108 transitions. [2020-10-27 18:28:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:28:40,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 288 [2020-10-27 18:28:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:40,527 INFO L225 Difference]: With dead ends: 18844 [2020-10-27 18:28:40,527 INFO L226 Difference]: Without dead ends: 9415 [2020-10-27 18:28:40,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:28:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9415 states. [2020-10-27 18:28:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9415 to 9411. [2020-10-27 18:28:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9411 states. [2020-10-27 18:28:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9411 states to 9411 states and 11482 transitions. [2020-10-27 18:28:40,790 INFO L78 Accepts]: Start accepts. Automaton has 9411 states and 11482 transitions. Word has length 288 [2020-10-27 18:28:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:40,792 INFO L481 AbstractCegarLoop]: Abstraction has 9411 states and 11482 transitions. [2020-10-27 18:28:40,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:28:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9411 states and 11482 transitions. [2020-10-27 18:28:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-27 18:28:40,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:40,813 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:40,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:28:40,814 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2108346480, now seen corresponding path program 1 times [2020-10-27 18:28:40,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:40,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257533982] [2020-10-27 18:28:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:40,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:41,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:41,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:45,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:45,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-27 18:28:45,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:28:45,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 18:28:45,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:45,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:45,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-10-27 18:28:45,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 18:28:45,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:46,122 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 18:28:46,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:46,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:46,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:46,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:46,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:46,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:28:46,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:46,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:46,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:46,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:28:46,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:46,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:46,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:28:46,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:46,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 18:28:46,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:46,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:46,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 18:28:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:46,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:46,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:28:46,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:46,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 18:28:46,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:46,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:28:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:46,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-10-27 18:28:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:46,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:46,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:46,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 18:28:46,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:46,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 18:28:46,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:46,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:28:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 18:28:46,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 255 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 18:28:46,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257533982] [2020-10-27 18:28:46,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:46,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:28:46,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922533989] [2020-10-27 18:28:46,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:28:46,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:46,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:28:46,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:28:46,848 INFO L87 Difference]: Start difference. First operand 9411 states and 11482 transitions. Second operand 7 states. [2020-10-27 18:28:47,799 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:29:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:29:07,624 INFO L93 Difference]: Finished difference Result 24801 states and 31083 transitions. [2020-10-27 18:29:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:29:07,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 344 [2020-10-27 18:29:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:29:07,689 INFO L225 Difference]: With dead ends: 24801 [2020-10-27 18:29:07,689 INFO L226 Difference]: Without dead ends: 15396 [2020-10-27 18:29:07,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:29:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15396 states. [2020-10-27 18:29:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15396 to 13850. [2020-10-27 18:29:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13850 states. [2020-10-27 18:29:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13850 states to 13850 states and 16924 transitions. [2020-10-27 18:29:08,118 INFO L78 Accepts]: Start accepts. Automaton has 13850 states and 16924 transitions. Word has length 344 [2020-10-27 18:29:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:29:08,119 INFO L481 AbstractCegarLoop]: Abstraction has 13850 states and 16924 transitions. [2020-10-27 18:29:08,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:29:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 13850 states and 16924 transitions. [2020-10-27 18:29:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-27 18:29:08,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:08,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:08,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:29:08,150 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 460211668, now seen corresponding path program 1 times [2020-10-27 18:29:08,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:08,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134108844] [2020-10-27 18:29:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:08,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:08,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:08,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:09,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:11,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:12,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-27 18:29:13,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 18:29:13,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:13,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:13,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:13,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:13,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:13,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:29:13,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:13,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:29:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:13,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:13,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:29:13,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:13,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 18:29:13,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:13,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:13,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:13,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:13,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 18:29:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:13,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:13,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:13,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:29:13,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:13,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 18:29:13,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:13,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 18:29:13,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 18:29:13,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:13,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-10-27 18:29:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:13,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:14,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:14,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:14,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 18:29:14,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:29:14,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-27 18:29:14,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:29:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 18:29:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-27 18:29:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134108844] [2020-10-27 18:29:14,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:29:14,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:29:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017024736] [2020-10-27 18:29:14,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:29:14,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:29:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:29:14,615 INFO L87 Difference]: Start difference. First operand 13850 states and 16924 transitions. Second operand 8 states. [2020-10-27 18:29:15,628 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 18:29:17,716 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 18:29:17,893 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 18:29:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:29:40,510 INFO L93 Difference]: Finished difference Result 38969 states and 48856 transitions. [2020-10-27 18:29:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 18:29:40,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 359 [2020-10-27 18:29:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:29:40,606 INFO L225 Difference]: With dead ends: 38969 [2020-10-27 18:29:40,606 INFO L226 Difference]: Without dead ends: 24504 [2020-10-27 18:29:40,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 18:29:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24504 states. [2020-10-27 18:29:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24504 to 12330. [2020-10-27 18:29:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12330 states. [2020-10-27 18:29:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12330 states to 12330 states and 15124 transitions. [2020-10-27 18:29:41,160 INFO L78 Accepts]: Start accepts. Automaton has 12330 states and 15124 transitions. Word has length 359 [2020-10-27 18:29:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:29:41,160 INFO L481 AbstractCegarLoop]: Abstraction has 12330 states and 15124 transitions. [2020-10-27 18:29:41,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:29:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand 12330 states and 15124 transitions. [2020-10-27 18:29:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-27 18:29:41,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:41,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:29:41,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:29:41,184 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:41,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1227620881, now seen corresponding path program 1 times [2020-10-27 18:29:41,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:41,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624762233] [2020-10-27 18:29:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:41,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:41,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:41,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:42,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:46,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 394 [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 353 [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 18:29:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:46,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:46,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:46,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:46,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:46,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:29:46,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:46,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:46,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:29:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:46,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:46,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:46,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 18:29:46,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:46,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 18:29:46,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:46,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:46,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-27 18:29:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:46,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-27 18:29:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-27 18:29:46,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624762233] [2020-10-27 18:29:46,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:29:46,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:29:46,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431113578] [2020-10-27 18:29:46,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:29:46,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:46,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:29:46,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:29:46,851 INFO L87 Difference]: Start difference. First operand 12330 states and 15124 transitions. Second operand 5 states.