/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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:14:05,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:14:05,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:14:05,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:14:05,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:14:05,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:14:05,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:14:05,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:14:05,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:14:05,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:14:05,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:14:05,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:14:05,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:14:05,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:14:05,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:14:05,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:14:05,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:14:05,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:14:05,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:14:05,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:14:05,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:14:05,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:14:05,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:14:05,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:14:05,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:14:05,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:14:05,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:14:05,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:14:05,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:14:05,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:14:05,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:14:05,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:14:05,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:14:05,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:14:05,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:14:05,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:14:05,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:14:05,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:14:05,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:14:05,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:14:05,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:14:05,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:14:05,392 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:14:05,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:14:05,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:14:05,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:14:05,398 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:14:05,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:14:05,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:14:05,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:14:05,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:14:05,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:14:05,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:14:05,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:14:05,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:14:05,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:14:05,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:14:05,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:14:05,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:14:05,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:14:05,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:14:05,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:14:05,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:14:05,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:14:05,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:14:05,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:14:05,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:14:05,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:14:05,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:14:05,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:14:05,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:14:05,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:14:05,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:14:05,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:14:05,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:14:05,879 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:14:05,880 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:14:05,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 00:14:05,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ee46c9b3/64f9fcee959949a1becb7212c73f1a23/FLAG2d8fead88 [2020-10-28 00:14:07,101 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:14:07,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 00:14:07,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ee46c9b3/64f9fcee959949a1becb7212c73f1a23/FLAG2d8fead88 [2020-10-28 00:14:07,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ee46c9b3/64f9fcee959949a1becb7212c73f1a23 [2020-10-28 00:14:07,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:14:07,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:14:07,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:14:07,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:14:07,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:14:07,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:07" (1/1) ... [2020-10-28 00:14:07,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a2a0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:07, skipping insertion in model container [2020-10-28 00:14:07,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:07" (1/1) ... [2020-10-28 00:14:07,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:14:07,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:14:09,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:14:09,176 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:14:09,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:14:09,840 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:14:09,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09 WrapperNode [2020-10-28 00:14:09,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:14:09,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:14:09,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:14:09,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:14:09,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... [2020-10-28 00:14:09,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... [2020-10-28 00:14:09,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... [2020-10-28 00:14:09,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... [2020-10-28 00:14:10,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... [2020-10-28 00:14:10,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... [2020-10-28 00:14:10,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... [2020-10-28 00:14:10,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:14:10,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:14:10,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:14:10,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:14:10,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:14:10,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:14:10,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:14:10,219 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:14:10,219 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:14:10,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:14:10,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:14:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:14:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:14:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:14:10,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:14:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:14:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:14:10,221 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:14:10,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:14:10,222 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:14:10,223 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:14:10,223 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:14:10,223 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:14:10,223 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:14:10,223 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:14:10,223 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:14:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:14:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:14:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:14:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:14:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:14:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:14:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:14:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:14:16,506 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:14:16,507 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:14:16,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:14:16 BoogieIcfgContainer [2020-10-28 00:14:16,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:14:16,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:14:16,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:14:16,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:14:16,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:14:07" (1/3) ... [2020-10-28 00:14:16,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112ab997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:14:16, skipping insertion in model container [2020-10-28 00:14:16,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:09" (2/3) ... [2020-10-28 00:14:16,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112ab997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:14:16, skipping insertion in model container [2020-10-28 00:14:16,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:14:16" (3/3) ... [2020-10-28 00:14:16,521 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 00:14:16,533 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:14:16,540 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:14:16,553 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:14:16,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:14:16,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:14:16,590 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:14:16,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:14:16,590 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:14:16,591 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:14:16,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:14:16,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:14:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states. [2020-10-28 00:14:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:14:16,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:16,676 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] [2020-10-28 00:14:16,676 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1330537411, now seen corresponding path program 1 times [2020-10-28 00:14:16,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:16,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917054618] [2020-10-28 00:14:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:17,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:17,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:18,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:22,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:22,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:14:22,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:14:22,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:14:22,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:14:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:14:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:14:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:14:23,890 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 00:14:23,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:23,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:23,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:23,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:23,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 00:14:23,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:23,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:23,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:23,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:23,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:24,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917054618] [2020-10-28 00:14:24,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:24,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:14:24,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052606740] [2020-10-28 00:14:24,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:14:24,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:14:24,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:14:24,036 INFO L87 Difference]: Start difference. First operand 2038 states. Second operand 7 states. [2020-10-28 00:14:25,519 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 452 [2020-10-28 00:14:43,020 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-28 00:14:44,866 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 452 [2020-10-28 00:14:46,824 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-28 00:14:49,957 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:14:52,633 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-28 00:14:54,106 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 451 [2020-10-28 00:14:55,592 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 452 [2020-10-28 00:14:57,342 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 453 [2020-10-28 00:14:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:57,430 INFO L93 Difference]: Finished difference Result 4918 states and 8477 transitions. [2020-10-28 00:14:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:14:57,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-28 00:14:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:57,488 INFO L225 Difference]: With dead ends: 4918 [2020-10-28 00:14:57,488 INFO L226 Difference]: Without dead ends: 3890 [2020-10-28 00:14:57,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:14:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2020-10-28 00:14:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3586. [2020-10-28 00:14:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3586 states. [2020-10-28 00:14:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 4862 transitions. [2020-10-28 00:14:57,755 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 4862 transitions. Word has length 69 [2020-10-28 00:14:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:57,756 INFO L481 AbstractCegarLoop]: Abstraction has 3586 states and 4862 transitions. [2020-10-28 00:14:57,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:14:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 4862 transitions. [2020-10-28 00:14:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:14:57,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:57,766 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] [2020-10-28 00:14:57,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:14:57,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1750230333, now seen corresponding path program 1 times [2020-10-28 00:14:57,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:57,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965129872] [2020-10-28 00:14:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:57,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:57,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:58,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:59,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:01,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:01,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:02,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:02,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:02,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:15:02,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:15:02,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-28 00:15:02,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:02,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:15:02,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:15:02,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:15:02,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:04,326 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 00:15:04,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:04,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:04,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:04,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:04,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:04,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:15:04,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:04,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:04,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:04,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965129872] [2020-10-28 00:15:04,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:04,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:15:04,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783367550] [2020-10-28 00:15:04,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:15:04,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:15:04,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:04,400 INFO L87 Difference]: Start difference. First operand 3586 states and 4862 transitions. Second operand 6 states. [2020-10-28 00:15:05,890 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:15:17,943 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-28 00:15:20,577 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:15:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:23,419 INFO L93 Difference]: Finished difference Result 12239 states and 17326 transitions. [2020-10-28 00:15:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:15:23,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 00:15:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:23,469 INFO L225 Difference]: With dead ends: 12239 [2020-10-28 00:15:23,469 INFO L226 Difference]: Without dead ends: 9666 [2020-10-28 00:15:23,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:15:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2020-10-28 00:15:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 7769. [2020-10-28 00:15:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7769 states. [2020-10-28 00:15:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 10753 transitions. [2020-10-28 00:15:23,889 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 10753 transitions. Word has length 70 [2020-10-28 00:15:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:23,890 INFO L481 AbstractCegarLoop]: Abstraction has 7769 states and 10753 transitions. [2020-10-28 00:15:23,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:15:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 10753 transitions. [2020-10-28 00:15:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:15:23,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:23,903 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] [2020-10-28 00:15:23,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:15:23,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash 128814950, now seen corresponding path program 1 times [2020-10-28 00:15:23,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:23,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282297097] [2020-10-28 00:15:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:23,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:24,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:24,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:24,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:25,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:27,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:27,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:27,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:28,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:28,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:15:28,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:15:28,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 00:15:28,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:15:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:15:28,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:15:28,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:30,385 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 00:15:30,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:30,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:30,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:30,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:30,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:30,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:15:30,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:30,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:30,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:30,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:30,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:30,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282297097] [2020-10-28 00:15:30,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:30,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:15:30,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388690350] [2020-10-28 00:15:30,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:15:30,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:30,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:15:30,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:30,468 INFO L87 Difference]: Start difference. First operand 7769 states and 10753 transitions. Second operand 6 states. [2020-10-28 00:15:31,899 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:15:43,279 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-28 00:15:45,909 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:15:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:47,779 INFO L93 Difference]: Finished difference Result 16235 states and 23953 transitions. [2020-10-28 00:15:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:15:47,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 00:15:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:47,850 INFO L225 Difference]: With dead ends: 16235 [2020-10-28 00:15:47,850 INFO L226 Difference]: Without dead ends: 14456 [2020-10-28 00:15:47,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:15:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14456 states. [2020-10-28 00:15:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14456 to 7734. [2020-10-28 00:15:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7734 states. [2020-10-28 00:15:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7734 states to 7734 states and 10871 transitions. [2020-10-28 00:15:48,360 INFO L78 Accepts]: Start accepts. Automaton has 7734 states and 10871 transitions. Word has length 70 [2020-10-28 00:15:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:48,360 INFO L481 AbstractCegarLoop]: Abstraction has 7734 states and 10871 transitions. [2020-10-28 00:15:48,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:15:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7734 states and 10871 transitions. [2020-10-28 00:15:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:15:48,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:48,380 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] [2020-10-28 00:15:48,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:15:48,380 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:48,381 INFO L82 PathProgramCache]: Analyzing trace with hash -983688255, now seen corresponding path program 1 times [2020-10-28 00:15:48,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:48,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006329180] [2020-10-28 00:15:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:48,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:48,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:51,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:52,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:52,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:53,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:53,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:53,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:53,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:15:53,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:15:53,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 00:15:53,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:15:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:15:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 00:15:53,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:55,229 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 00:15:55,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:55,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:55,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:55,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:55,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:15:55,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:55,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006329180] [2020-10-28 00:15:55,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:55,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:15:55,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572200488] [2020-10-28 00:15:55,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:15:55,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:55,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:15:55,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:15:55,302 INFO L87 Difference]: Start difference. First operand 7734 states and 10871 transitions. Second operand 11 states. [2020-10-28 00:15:56,902 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 464 [2020-10-28 00:16:13,529 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:16:15,264 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-28 00:16:19,321 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 453 [2020-10-28 00:16:22,078 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-28 00:16:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:22,841 INFO L93 Difference]: Finished difference Result 10509 states and 14899 transitions. [2020-10-28 00:16:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:16:22,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-28 00:16:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:22,872 INFO L225 Difference]: With dead ends: 10509 [2020-10-28 00:16:22,872 INFO L226 Difference]: Without dead ends: 10503 [2020-10-28 00:16:22,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-10-28 00:16:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10503 states. [2020-10-28 00:16:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10503 to 7734. [2020-10-28 00:16:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7734 states. [2020-10-28 00:16:23,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7734 states to 7734 states and 10870 transitions. [2020-10-28 00:16:23,246 INFO L78 Accepts]: Start accepts. Automaton has 7734 states and 10870 transitions. Word has length 70 [2020-10-28 00:16:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:23,247 INFO L481 AbstractCegarLoop]: Abstraction has 7734 states and 10870 transitions. [2020-10-28 00:16:23,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:16:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7734 states and 10870 transitions. [2020-10-28 00:16:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:16:23,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:23,259 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] [2020-10-28 00:16:23,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:16:23,259 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2048492076, now seen corresponding path program 1 times [2020-10-28 00:16:23,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:23,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674305377] [2020-10-28 00:16:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:23,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:23,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:23,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:23,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:24,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:24,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:25,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:28,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:16:28,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:29,860 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 00:16:29,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:29,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:29,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:29,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:29,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:16:29,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:29,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:29,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:29,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:29,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:29,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674305377] [2020-10-28 00:16:29,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:29,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:16:29,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048577006] [2020-10-28 00:16:29,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:16:29,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:16:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:16:29,930 INFO L87 Difference]: Start difference. First operand 7734 states and 10870 transitions. Second operand 6 states. [2020-10-28 00:16:31,423 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:16:44,150 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-28 00:16:47,012 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 00:16:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:50,204 INFO L93 Difference]: Finished difference Result 30026 states and 44958 transitions. [2020-10-28 00:16:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:16:50,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 00:16:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:50,277 INFO L225 Difference]: With dead ends: 30026 [2020-10-28 00:16:50,277 INFO L226 Difference]: Without dead ends: 27528 [2020-10-28 00:16:50,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:16:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27528 states. [2020-10-28 00:16:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27528 to 17501. [2020-10-28 00:16:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17501 states. [2020-10-28 00:16:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17501 states to 17501 states and 25409 transitions. [2020-10-28 00:16:51,308 INFO L78 Accepts]: Start accepts. Automaton has 17501 states and 25409 transitions. Word has length 70 [2020-10-28 00:16:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:51,309 INFO L481 AbstractCegarLoop]: Abstraction has 17501 states and 25409 transitions. [2020-10-28 00:16:51,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:16:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 17501 states and 25409 transitions. [2020-10-28 00:16:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:16:51,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:51,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:16:51,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:16:51,326 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1007721704, now seen corresponding path program 1 times [2020-10-28 00:16:51,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:51,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920794189] [2020-10-28 00:16:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:51,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:52,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:54,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:54,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:55,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:56,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:56,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:16:56,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:16:56,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 00:16:56,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:16:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:16:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:16:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:58,246 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 00:16:58,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:58,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:58,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:58,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:58,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:58,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:16:58,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:58,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:58,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:58,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920794189] [2020-10-28 00:16:58,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:58,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:16:58,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417130694] [2020-10-28 00:16:58,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:16:58,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:16:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:16:58,325 INFO L87 Difference]: Start difference. First operand 17501 states and 25409 transitions. Second operand 11 states. [2020-10-28 00:16:59,913 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-28 00:17:00,700 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-28 00:17:15,083 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 465 [2020-10-28 00:17:17,794 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 453 [2020-10-28 00:17:21,277 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 460 [2020-10-28 00:17:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:23,972 INFO L93 Difference]: Finished difference Result 45740 states and 68203 transitions. [2020-10-28 00:17:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 00:17:23,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-28 00:17:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:24,056 INFO L225 Difference]: With dead ends: 45740 [2020-10-28 00:17:24,056 INFO L226 Difference]: Without dead ends: 45735 [2020-10-28 00:17:24,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 00:17:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45735 states. [2020-10-28 00:17:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45735 to 17498. [2020-10-28 00:17:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17498 states. [2020-10-28 00:17:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17498 states to 17498 states and 25404 transitions. [2020-10-28 00:17:25,443 INFO L78 Accepts]: Start accepts. Automaton has 17498 states and 25404 transitions. Word has length 71 [2020-10-28 00:17:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:25,443 INFO L481 AbstractCegarLoop]: Abstraction has 17498 states and 25404 transitions. [2020-10-28 00:17:25,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:17:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 17498 states and 25404 transitions. [2020-10-28 00:17:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:17:25,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:25,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:25,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:17:25,472 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -647182703, now seen corresponding path program 1 times [2020-10-28 00:17:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:25,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138046027] [2020-10-28 00:17:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:25,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:25,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:25,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:26,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:26,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:26,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:28,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:29,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:30,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:30,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:30,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:17:30,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:17:30,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 00:17:30,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:17:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:17:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:17:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:31,925 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 00:17:31,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:31,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:31,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:31,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138046027] [2020-10-28 00:17:31,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:31,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:17:31,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981678625] [2020-10-28 00:17:31,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:17:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:17:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:17:31,976 INFO L87 Difference]: Start difference. First operand 17498 states and 25404 transitions. Second operand 7 states. [2020-10-28 00:17:33,471 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 452