/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:57:22,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:57:22,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:57:22,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:57:22,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:57:22,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:57:22,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:57:22,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:57:22,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:57:22,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:57:22,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:57:22,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:57:22,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:57:22,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:57:22,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:57:22,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:57:22,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:57:22,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:57:22,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:57:22,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:57:22,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:57:22,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:57:22,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:57:22,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:57:22,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:57:22,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:57:22,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:57:22,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:57:22,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:57:22,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:57:22,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:57:22,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:57:22,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:57:22,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:57:22,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:57:22,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:57:22,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:57:22,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:57:22,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:57:22,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:57:22,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:57:22,470 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 18:57:22,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:57:22,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:57:22,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:57:22,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:57:22,544 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:57:22,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:57:22,545 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:57:22,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:57:22,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:57:22,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:57:22,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:57:22,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:57:22,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:57:22,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:57:22,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:57:22,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:57:22,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:57:22,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:57:22,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:57:22,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:57:22,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:57:22,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:57:22,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:57:22,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:57:22,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:57:22,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:57:22,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:57:22,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:57:22,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:57:22,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:57:22,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:57:23,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:57:23,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:57:23,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:57:23,035 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:57:23,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label39.c [2020-10-27 18:57:23,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5a57f382/7e741436730244f6b03e6be1caa9baba/FLAG09e89368d [2020-10-27 18:57:24,186 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:57:24,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label39.c [2020-10-27 18:57:24,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5a57f382/7e741436730244f6b03e6be1caa9baba/FLAG09e89368d [2020-10-27 18:57:24,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5a57f382/7e741436730244f6b03e6be1caa9baba [2020-10-27 18:57:24,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:57:24,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:57:24,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:57:24,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:57:24,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:57:24,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:57:24" (1/1) ... [2020-10-27 18:57:24,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a7665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:24, skipping insertion in model container [2020-10-27 18:57:24,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:57:24" (1/1) ... [2020-10-27 18:57:24,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:57:24,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:57:26,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:57:26,435 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:57:26,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:57:26,998 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:57:26,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26 WrapperNode [2020-10-27 18:57:26,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:57:27,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:57:27,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:57:27,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:57:27,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (1/1) ... [2020-10-27 18:57:27,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (1/1) ... [2020-10-27 18:57:27,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (1/1) ... [2020-10-27 18:57:27,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (1/1) ... [2020-10-27 18:57:27,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (1/1) ... [2020-10-27 18:57:27,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (1/1) ... [2020-10-27 18:57:27,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (1/1) ... [2020-10-27 18:57:27,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:57:27,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:57:27,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:57:27,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:57:27,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (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 18:57:27,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:57:27,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:57:27,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:57:27,510 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:57:27,511 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:57:27,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:57:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:57:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:57:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:57:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:57:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:57:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:57:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:57:27,514 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:57:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:57:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:57:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:57:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:57:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:57:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:57:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:57:39,300 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:57:39,301 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:57:39,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:57:39 BoogieIcfgContainer [2020-10-27 18:57:39,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:57:39,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:57:39,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:57:39,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:57:39,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:57:24" (1/3) ... [2020-10-27 18:57:39,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e31aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:57:39, skipping insertion in model container [2020-10-27 18:57:39,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:57:26" (2/3) ... [2020-10-27 18:57:39,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e31aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:57:39, skipping insertion in model container [2020-10-27 18:57:39,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:57:39" (3/3) ... [2020-10-27 18:57:39,316 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label39.c [2020-10-27 18:57:39,329 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:57:39,337 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:57:39,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:57:39,397 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:57:39,397 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:57:39,397 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:57:39,398 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:57:39,398 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:57:39,398 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:57:39,398 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:57:39,398 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:57:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:57:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 18:57:39,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:39,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:57:39,458 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash -652075046, now seen corresponding path program 1 times [2020-10-27 18:57:39,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:39,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879950459] [2020-10-27 18:57:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:40,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:40,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:40,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:57:40,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:40,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 915 [2020-10-27 18:57:40,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:40,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:57:40,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:57:40,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:57:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:57:41,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:57:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:41,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:41,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:57:41,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:57:41,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:57:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 18:57:41,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:57:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:57:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:57:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:57:41,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:57:41,306 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 18:57:41,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879950459] [2020-10-27 18:57:41,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:57:41,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:57:41,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851576882] [2020-10-27 18:57:41,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:57:41,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:57:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:57:41,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:57:41,352 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:57:41,518 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:57:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:57:57,622 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 18:57:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:57:57,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 18:57:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:57:57,653 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 18:57:57,654 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 18:57:57,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:57:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 18:57:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 18:57:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 18:57:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 18:57:57,871 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 70 [2020-10-27 18:57:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:57:57,872 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 18:57:57,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:57:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 18:57:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 18:57:57,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:57:57,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:57:57,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:57:57,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:57:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:57:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash 826985050, now seen corresponding path program 1 times [2020-10-27 18:57:57,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:57:57,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229953501] [2020-10-27 18:57:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:57:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:57:58,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:58,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:57:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:01,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:01,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 18:58:01,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:58:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3829 [2020-10-27 18:58:01,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:01,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:01,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:58:01,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:58:01,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:58:02,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:02,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:02,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:02,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:02,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:02,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 18:58:02,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:02,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:02,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:02,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:58:02,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:02,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:02,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:02,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:58:02,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:02,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 18:58:02,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:02,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:02,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:02,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:58:02,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:58:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:58:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229953501] [2020-10-27 18:58:02,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:02,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:02,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549308212] [2020-10-27 18:58:02,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:02,406 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 5 states. [2020-10-27 18:58:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:19,091 INFO L93 Difference]: Finished difference Result 2866 states and 4442 transitions. [2020-10-27 18:58:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:58:19,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2020-10-27 18:58:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:19,110 INFO L225 Difference]: With dead ends: 2866 [2020-10-27 18:58:19,110 INFO L226 Difference]: Without dead ends: 1880 [2020-10-27 18:58:19,117 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 18:58:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2020-10-27 18:58:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1876. [2020-10-27 18:58:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2020-10-27 18:58:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2567 transitions. [2020-10-27 18:58:19,223 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2567 transitions. Word has length 141 [2020-10-27 18:58:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:19,227 INFO L481 AbstractCegarLoop]: Abstraction has 1876 states and 2567 transitions. [2020-10-27 18:58:19,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:58:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2567 transitions. [2020-10-27 18:58:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 18:58:19,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:19,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:58:19,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:58:19,242 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash 729778983, now seen corresponding path program 1 times [2020-10-27 18:58:19,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:19,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159469567] [2020-10-27 18:58:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:19,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:19,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:20,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:23,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:23,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 18:58:23,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:58:23,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4474 [2020-10-27 18:58:23,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:23,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 18:58:23,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:58:23,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 18:58:23,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:24,649 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-27 18:58:24,823 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-27 18:58:24,991 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 18:58:25,190 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 18:58:25,412 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-27 18:58:25,670 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-27 18:58:25,898 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-27 18:58:26,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:26,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:26,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:26,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:26,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:58:26,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:26,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:26,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:26,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:26,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:26,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:26,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:26,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:58:26,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:26,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 18:58:26,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:26,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:26,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:26,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:58:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:58:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159469567] [2020-10-27 18:58:26,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:26,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 18:58:26,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443518684] [2020-10-27 18:58:26,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 18:58:26,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 18:58:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-10-27 18:58:26,780 INFO L87 Difference]: Start difference. First operand 1876 states and 2567 transitions. Second operand 20 states. [2020-10-27 18:58:27,868 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:58:28,001 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 18:58:28,204 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 18:58:28,475 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 18:58:28,685 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-27 18:58:28,907 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 18:58:29,415 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-27 18:58:29,747 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 18:58:29,954 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-27 18:58:30,240 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-27 18:58:30,432 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 18:58:30,628 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 18:58:30,808 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 18:58:31,094 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-27 18:58:31,239 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:58:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:58:45,387 INFO L93 Difference]: Finished difference Result 3227 states and 4490 transitions. [2020-10-27 18:58:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 18:58:45,396 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 144 [2020-10-27 18:58:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:58:45,409 INFO L225 Difference]: With dead ends: 3227 [2020-10-27 18:58:45,409 INFO L226 Difference]: Without dead ends: 1880 [2020-10-27 18:58:45,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 18:58:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2020-10-27 18:58:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1876. [2020-10-27 18:58:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2020-10-27 18:58:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2400 transitions. [2020-10-27 18:58:45,484 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2400 transitions. Word has length 144 [2020-10-27 18:58:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:58:45,485 INFO L481 AbstractCegarLoop]: Abstraction has 1876 states and 2400 transitions. [2020-10-27 18:58:45,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 18:58:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2400 transitions. [2020-10-27 18:58:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 18:58:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:58:45,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:58:45,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:58:45,489 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:58:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:58:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1793652938, now seen corresponding path program 1 times [2020-10-27 18:58:45,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:58:45,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591423271] [2020-10-27 18:58:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:58:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:45,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:45,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:47,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:47,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:47,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 18:58:47,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:58:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2114 [2020-10-27 18:58:47,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:47,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:58:47,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:58:47,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:58:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:47,863 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:58:47,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:58:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:47,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:47,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:58:47,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:47,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:58:47,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:47,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:58:47,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:47,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:58:47,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 18:58:47,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:58:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:58:47,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:58:48,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:58:48,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:58:48,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:58:48,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 18:58:48,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:58:48,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:58:48,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:58:48,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:58:48,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:58:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:58:48,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591423271] [2020-10-27 18:58:48,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:58:48,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:58:48,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422735979] [2020-10-27 18:58:48,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:58:48,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:58:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:58:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:58:48,197 INFO L87 Difference]: Start difference. First operand 1876 states and 2400 transitions. Second operand 5 states. [2020-10-27 18:59:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:02,836 INFO L93 Difference]: Finished difference Result 5092 states and 6645 transitions. [2020-10-27 18:59:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:02,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2020-10-27 18:59:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:02,860 INFO L225 Difference]: With dead ends: 5092 [2020-10-27 18:59:02,860 INFO L226 Difference]: Without dead ends: 3222 [2020-10-27 18:59:02,868 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 18:59:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2020-10-27 18:59:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3202. [2020-10-27 18:59:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3202 states. [2020-10-27 18:59:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 3994 transitions. [2020-10-27 18:59:02,979 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 3994 transitions. Word has length 149 [2020-10-27 18:59:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:02,980 INFO L481 AbstractCegarLoop]: Abstraction has 3202 states and 3994 transitions. [2020-10-27 18:59:02,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 3994 transitions. [2020-10-27 18:59:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 18:59:02,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:02,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:59:02,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:59:02,985 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:02,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:02,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1096762298, now seen corresponding path program 1 times [2020-10-27 18:59:02,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:02,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77643844] [2020-10-27 18:59:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:03,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:03,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:03,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 18:59:03,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:03,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 18:59:03,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:03,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 18:59:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:59:03,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:03,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:03,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:03,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:03,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:03,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:03,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:59:03,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:03,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:03,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:03,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:03,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:03,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:59:03,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:03,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:59:03,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:03,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:03,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:03,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 18:59:03,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:59:03,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77643844] [2020-10-27 18:59:03,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:03,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:03,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117779805] [2020-10-27 18:59:03,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:03,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:03,844 INFO L87 Difference]: Start difference. First operand 3202 states and 3994 transitions. Second operand 5 states. [2020-10-27 18:59:04,703 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:59:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:20,505 INFO L93 Difference]: Finished difference Result 7275 states and 9388 transitions. [2020-10-27 18:59:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:20,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-27 18:59:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:20,533 INFO L225 Difference]: With dead ends: 7275 [2020-10-27 18:59:20,534 INFO L226 Difference]: Without dead ends: 5405 [2020-10-27 18:59:20,540 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 18:59:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5405 states. [2020-10-27 18:59:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5405 to 4530. [2020-10-27 18:59:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-10-27 18:59:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 5864 transitions. [2020-10-27 18:59:20,676 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 5864 transitions. Word has length 157 [2020-10-27 18:59:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:20,677 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 5864 transitions. [2020-10-27 18:59:20,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 5864 transitions. [2020-10-27 18:59:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 18:59:20,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:20,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:59:20,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:59:20,681 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:20,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1908248486, now seen corresponding path program 1 times [2020-10-27 18:59:20,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:20,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565602992] [2020-10-27 18:59:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:20,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:21,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:21,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 18:59:21,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:59:21,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-27 18:59:21,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:21,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:21,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 18:59:21,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:59:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:22,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:22,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:22,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:22,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:22,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:22,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:59:22,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:22,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:22,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:22,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:22,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:22,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:22,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 18:59:22,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:22,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:59:22,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:22,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:22,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:22,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:59:22,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:59:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565602992] [2020-10-27 18:59:22,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:22,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:22,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839888492] [2020-10-27 18:59:22,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:22,315 INFO L87 Difference]: Start difference. First operand 4530 states and 5864 transitions. Second operand 5 states. [2020-10-27 18:59:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:38,764 INFO L93 Difference]: Finished difference Result 9065 states and 12366 transitions. [2020-10-27 18:59:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:38,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-27 18:59:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:38,800 INFO L225 Difference]: With dead ends: 9065 [2020-10-27 18:59:38,802 INFO L226 Difference]: Without dead ends: 6306 [2020-10-27 18:59:38,811 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 18:59:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6306 states. [2020-10-27 18:59:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6306 to 6298. [2020-10-27 18:59:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6298 states. [2020-10-27 18:59:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 7899 transitions. [2020-10-27 18:59:39,009 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 7899 transitions. Word has length 167 [2020-10-27 18:59:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:59:39,010 INFO L481 AbstractCegarLoop]: Abstraction has 6298 states and 7899 transitions. [2020-10-27 18:59:39,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:59:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 7899 transitions. [2020-10-27 18:59:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-27 18:59:39,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:59:39,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:59:39,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:59:39,016 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:59:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:59:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 932726911, now seen corresponding path program 1 times [2020-10-27 18:59:39,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:59:39,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383629474] [2020-10-27 18:59:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:59:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:40,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:41,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:41,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-27 18:59:41,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:59:41,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2321 [2020-10-27 18:59:41,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:41,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:59:41,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-27 18:59:41,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:59:41,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:41,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:59:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:41,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:41,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:59:41,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:41,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:59:41,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:59:41,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:41,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:59:41,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:59:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:59:41,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:59:41,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:59:41,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 18:59:41,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:59:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 18:59:41,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:59:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:59:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:59:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 18:59:41,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:59:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:59:41,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383629474] [2020-10-27 18:59:41,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:59:41,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:59:41,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699447706] [2020-10-27 18:59:41,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:59:41,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:59:41,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:59:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:59:41,959 INFO L87 Difference]: Start difference. First operand 6298 states and 7899 transitions. Second operand 5 states. [2020-10-27 18:59:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:59:59,887 INFO L93 Difference]: Finished difference Result 15685 states and 20221 transitions. [2020-10-27 18:59:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:59:59,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2020-10-27 18:59:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:59:59,929 INFO L225 Difference]: With dead ends: 15685 [2020-10-27 18:59:59,930 INFO L226 Difference]: Without dead ends: 9393 [2020-10-27 18:59:59,946 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 18:59:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2020-10-27 19:00:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 8078. [2020-10-27 19:00:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8078 states. [2020-10-27 19:00:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8078 states to 8078 states and 10108 transitions. [2020-10-27 19:00:00,177 INFO L78 Accepts]: Start accepts. Automaton has 8078 states and 10108 transitions. Word has length 198 [2020-10-27 19:00:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:00:00,178 INFO L481 AbstractCegarLoop]: Abstraction has 8078 states and 10108 transitions. [2020-10-27 19:00:00,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:00:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8078 states and 10108 transitions. [2020-10-27 19:00:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 19:00:00,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:00:00,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:00:00,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:00:00,184 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:00:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:00:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1485436090, now seen corresponding path program 1 times [2020-10-27 19:00:00,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:00:00,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160121395] [2020-10-27 19:00:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:00:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:00,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:00,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:01,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:02,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:02,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 19:00:02,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:00:02,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2377 [2020-10-27 19:00:02,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:02,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:00:02,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-27 19:00:02,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:00:02,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:02,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:00:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:02,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:02,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:00:02,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:02,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:00:02,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:02,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:02,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:00:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:02,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:02,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:03,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:03,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 19:00:03,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:00:03,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 19:00:03,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:00:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-27 19:00:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:00:03,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:00:03,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160121395] [2020-10-27 19:00:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:00:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:00:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632109369] [2020-10-27 19:00:03,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:00:03,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:00:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:00:03,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:00:03,154 INFO L87 Difference]: Start difference. First operand 8078 states and 10108 transitions. Second operand 6 states. [2020-10-27 19:00:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:00:23,971 INFO L93 Difference]: Finished difference Result 21423 states and 27966 transitions. [2020-10-27 19:00:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:00:23,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 214 [2020-10-27 19:00:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:00:24,018 INFO L225 Difference]: With dead ends: 21423 [2020-10-27 19:00:24,018 INFO L226 Difference]: Without dead ends: 13351 [2020-10-27 19:00:24,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:00:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2020-10-27 19:00:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 12475. [2020-10-27 19:00:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12475 states. [2020-10-27 19:00:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12475 states to 12475 states and 15409 transitions. [2020-10-27 19:00:24,345 INFO L78 Accepts]: Start accepts. Automaton has 12475 states and 15409 transitions. Word has length 214 [2020-10-27 19:00:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:00:24,346 INFO L481 AbstractCegarLoop]: Abstraction has 12475 states and 15409 transitions. [2020-10-27 19:00:24,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:00:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 12475 states and 15409 transitions. [2020-10-27 19:00:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-27 19:00:24,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:00:24,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 19:00:24,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:00:24,354 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:00:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:00:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash -341727224, now seen corresponding path program 1 times [2020-10-27 19:00:24,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:00:24,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535468036] [2020-10-27 19:00:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:00:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:24,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:24,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:28,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:29,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:29,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 19:00:29,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:00:29,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 19:00:29,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:00:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 19:00:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 19:00:29,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:29,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:00:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:29,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:29,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:00:29,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:29,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:00:29,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:29,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:29,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:29,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:29,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:29,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:00:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:29,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:29,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:29,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:00:29,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:29,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 19:00:29,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 19:00:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:29,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:29,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 19:00:29,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:29,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 19:00:29,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:00:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:29,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:00:29,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 19:00:29,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535468036] [2020-10-27 19:00:29,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:00:29,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:00:29,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057393821] [2020-10-27 19:00:29,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:00:29,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:00:29,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:00:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:00:29,878 INFO L87 Difference]: Start difference. First operand 12475 states and 15409 transitions. Second operand 5 states. [2020-10-27 19:00:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:00:49,370 INFO L93 Difference]: Finished difference Result 24465 states and 30735 transitions. [2020-10-27 19:00:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:00:49,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2020-10-27 19:00:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:00:49,431 INFO L225 Difference]: With dead ends: 24465 [2020-10-27 19:00:49,432 INFO L226 Difference]: Without dead ends: 15950 [2020-10-27 19:00:49,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:00:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15950 states. [2020-10-27 19:00:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15950 to 13345. [2020-10-27 19:00:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13345 states. [2020-10-27 19:00:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 16688 transitions. [2020-10-27 19:00:49,951 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 16688 transitions. Word has length 227 [2020-10-27 19:00:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:00:49,952 INFO L481 AbstractCegarLoop]: Abstraction has 13345 states and 16688 transitions. [2020-10-27 19:00:49,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:00:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 16688 transitions. [2020-10-27 19:00:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-27 19:00:49,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:00:49,960 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:00:49,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:00:49,960 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:00:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:00:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1370570318, now seen corresponding path program 1 times [2020-10-27 19:00:49,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:00:49,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198434384] [2020-10-27 19:00:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:00:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:50,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:50,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:50,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:51,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:55,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:55,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-27 19:00:55,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:00:55,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 19:00:55,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:00:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 19:00:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 19:00:55,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:55,295 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:00:55,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:00:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:55,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:55,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:55,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:00:55,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:55,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:00:55,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:55,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:55,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:00:55,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:00:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:55,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:55,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:55,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:00:55,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 19:00:55,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:00:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:00:55,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:55,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:00:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:00:55,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:00:55,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:00:55,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:00:55,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:00:55,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 19:00:55,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:00:55,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:00:55,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:00:55,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:00:55,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:00:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 19:00:55,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198434384] [2020-10-27 19:00:55,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:00:55,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:00:55,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286800631] [2020-10-27 19:00:55,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:00:55,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:00:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:00:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:00:55,668 INFO L87 Difference]: Start difference. First operand 13345 states and 16688 transitions. Second operand 5 states. [2020-10-27 19:00:55,832 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66