/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_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:37:46,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:37:46,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:37:46,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:37:46,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:37:46,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:37:46,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:37:46,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:37:46,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:37:46,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:37:46,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:37:46,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:37:46,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:37:46,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:37:46,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:37:46,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:37:46,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:37:46,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:37:46,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:37:46,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:37:46,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:37:46,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:37:46,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:37:46,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:37:46,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:37:46,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:37:46,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:37:46,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:37:46,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:37:46,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:37:46,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:37:46,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:37:46,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:37:46,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:37:46,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:37:46,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:37:46,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:37:46,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:37:46,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:37:46,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:37:46,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:37:46,425 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 23:37:46,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:37:46,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:37:46,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:37:46,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:37:46,476 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:37:46,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:37:46,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:37:46,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:37:46,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:37:46,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:37:46,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:37:46,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:37:46,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:37:46,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:37:46,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:37:46,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:37:46,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:37:46,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:37:46,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:37:46,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:37:46,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:37:46,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:37:46,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:37:46,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:37:46,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:37:46,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:37:46,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:37:46,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:37:46,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:37:46,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:37:46,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:37:46,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:37:46,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:37:46,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:37:46,885 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:37:46,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-27 23:37:46,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd763a9f/ea5fb03de63b44c69c8c43a6b5b83c8e/FLAG5768a0f7f [2020-10-27 23:37:47,993 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:37:47,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-27 23:37:48,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd763a9f/ea5fb03de63b44c69c8c43a6b5b83c8e/FLAG5768a0f7f [2020-10-27 23:37:48,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bd763a9f/ea5fb03de63b44c69c8c43a6b5b83c8e [2020-10-27 23:37:48,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:37:48,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:37:48,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:37:48,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:37:48,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:37:48,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:37:48" (1/1) ... [2020-10-27 23:37:48,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ccef6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:48, skipping insertion in model container [2020-10-27 23:37:48,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:37:48" (1/1) ... [2020-10-27 23:37:48,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:37:48,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:37:51,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:37:51,019 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:37:52,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:37:52,465 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:37:52,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52 WrapperNode [2020-10-27 23:37:52,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:37:52,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:37:52,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:37:52,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:37:52,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (1/1) ... [2020-10-27 23:37:52,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (1/1) ... [2020-10-27 23:37:52,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (1/1) ... [2020-10-27 23:37:52,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (1/1) ... [2020-10-27 23:37:52,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (1/1) ... [2020-10-27 23:37:52,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (1/1) ... [2020-10-27 23:37:52,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (1/1) ... [2020-10-27 23:37:52,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:37:52,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:37:52,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:37:52,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:37:52,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (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 23:37:52,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:37:52,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:37:52,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:37:52,885 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:37:52,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:37:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:37:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:37:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:37:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:37:52,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:37:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:37:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:37:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:37:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:37:52,888 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:37:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:37:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:37:52,889 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:37:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:37:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:37:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:37:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:37:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:37:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:37:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:37:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:37:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:37:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:37:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:37:59,272 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:37:59,272 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:37:59,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:37:59 BoogieIcfgContainer [2020-10-27 23:37:59,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:37:59,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:37:59,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:37:59,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:37:59,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:37:48" (1/3) ... [2020-10-27 23:37:59,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c12a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:37:59, skipping insertion in model container [2020-10-27 23:37:59,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:37:52" (2/3) ... [2020-10-27 23:37:59,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c12a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:37:59, skipping insertion in model container [2020-10-27 23:37:59,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:37:59" (3/3) ... [2020-10-27 23:37:59,291 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-10-27 23:37:59,303 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:37:59,310 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:37:59,322 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:37:59,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:37:59,367 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:37:59,367 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:37:59,368 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:37:59,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:37:59,368 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:37:59,368 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:37:59,368 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:37:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states. [2020-10-27 23:37:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-27 23:37:59,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:37:59,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:59,474 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:37:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:37:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2058974461, now seen corresponding path program 1 times [2020-10-27 23:37:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:37:59,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095511394] [2020-10-27 23:37:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:01,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:02,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:02,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:03,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:03,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:05,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:05,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-27 23:38:05,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:38:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-27 23:38:05,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:38:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-27 23:38:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:38:05,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:38:06,893 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:38:06,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:06,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:06,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:06,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 23:38:06,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:06,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:38:07,125 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 23:38:07,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095511394] [2020-10-27 23:38:07,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:07,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:38:07,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736395965] [2020-10-27 23:38:07,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:38:07,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:07,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:38:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:07,160 INFO L87 Difference]: Start difference. First operand 2253 states. Second operand 5 states. [2020-10-27 23:38:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:23,315 INFO L93 Difference]: Finished difference Result 3772 states and 6567 transitions. [2020-10-27 23:38:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:38:23,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 291 [2020-10-27 23:38:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:23,354 INFO L225 Difference]: With dead ends: 3772 [2020-10-27 23:38:23,354 INFO L226 Difference]: Without dead ends: 2245 [2020-10-27 23:38:23,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:38:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-10-27 23:38:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-10-27 23:38:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-10-27 23:38:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3922 transitions. [2020-10-27 23:38:23,526 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3922 transitions. Word has length 291 [2020-10-27 23:38:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:23,528 INFO L481 AbstractCegarLoop]: Abstraction has 2245 states and 3922 transitions. [2020-10-27 23:38:23,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:38:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3922 transitions. [2020-10-27 23:38:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-27 23:38:23,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:23,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:23,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:38:23,539 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:23,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1312343415, now seen corresponding path program 1 times [2020-10-27 23:38:23,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:23,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248743210] [2020-10-27 23:38:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:23,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:23,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:24,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:24,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:24,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:25,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:25,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:26,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:28,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:28,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 23:38:28,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:38:28,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:38:28,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:28,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:38:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-27 23:38:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 23:38:28,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:29,991 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:38:29,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:30,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:30,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:30,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:30,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:38:30,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:30,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:30,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:30,156 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 23:38:30,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248743210] [2020-10-27 23:38:30,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:30,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:38:30,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375335435] [2020-10-27 23:38:30,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:38:30,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:38:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:38:30,160 INFO L87 Difference]: Start difference. First operand 2245 states and 3922 transitions. Second operand 4 states. [2020-10-27 23:38:31,419 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-27 23:38:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:38:48,515 INFO L93 Difference]: Finished difference Result 5146 states and 8866 transitions. [2020-10-27 23:38:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:38:48,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 300 [2020-10-27 23:38:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:38:48,538 INFO L225 Difference]: With dead ends: 5146 [2020-10-27 23:38:48,538 INFO L226 Difference]: Without dead ends: 3629 [2020-10-27 23:38:48,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2020-10-27 23:38:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3625. [2020-10-27 23:38:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3625 states. [2020-10-27 23:38:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 6234 transitions. [2020-10-27 23:38:48,682 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 6234 transitions. Word has length 300 [2020-10-27 23:38:48,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:38:48,683 INFO L481 AbstractCegarLoop]: Abstraction has 3625 states and 6234 transitions. [2020-10-27 23:38:48,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:38:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 6234 transitions. [2020-10-27 23:38:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-27 23:38:48,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:38:48,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:48,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:38:48,697 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:38:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:38:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash -855057345, now seen corresponding path program 1 times [2020-10-27 23:38:48,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:38:48,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74839962] [2020-10-27 23:38:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:38:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:48,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:49,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:50,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:50,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:53,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:53,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 23:38:53,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:38:53,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-27 23:38:53,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:38:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 182 [2020-10-27 23:38:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:38:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:55,254 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:38:55,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:38:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:38:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:38:55,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:38:55,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:38:55,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:38:55,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 23:38:55,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:38:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:38:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:38:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:38:55,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:38:55,439 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 23:38:55,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74839962] [2020-10-27 23:38:55,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:38:55,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:38:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550209803] [2020-10-27 23:38:55,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:38:55,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:38:55,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:38:55,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:38:55,443 INFO L87 Difference]: Start difference. First operand 3625 states and 6234 transitions. Second operand 5 states. [2020-10-27 23:39:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:10,207 INFO L93 Difference]: Finished difference Result 6022 states and 10300 transitions. [2020-10-27 23:39:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:39:10,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-10-27 23:39:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:10,230 INFO L225 Difference]: With dead ends: 6022 [2020-10-27 23:39:10,231 INFO L226 Difference]: Without dead ends: 3625 [2020-10-27 23:39:10,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:39:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2020-10-27 23:39:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 3625. [2020-10-27 23:39:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3625 states. [2020-10-27 23:39:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 6218 transitions. [2020-10-27 23:39:10,342 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 6218 transitions. Word has length 301 [2020-10-27 23:39:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:10,343 INFO L481 AbstractCegarLoop]: Abstraction has 3625 states and 6218 transitions. [2020-10-27 23:39:10,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:39:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 6218 transitions. [2020-10-27 23:39:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 23:39:10,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:10,361 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:10,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:39:10,361 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:10,362 INFO L82 PathProgramCache]: Analyzing trace with hash 703679202, now seen corresponding path program 1 times [2020-10-27 23:39:10,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:10,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342698379] [2020-10-27 23:39:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:10,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:11,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:12,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:15,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:15,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-27 23:39:15,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:39:15,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 23:39:15,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:15,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:39:15,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-27 23:39:15,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:39:15,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:16,787 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:39:16,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:16,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:16,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:16,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:16,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:39:16,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:16,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:16,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:16,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:16,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:16,918 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 23:39:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342698379] [2020-10-27 23:39:16,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:39:16,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:39:16,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684286565] [2020-10-27 23:39:16,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:39:16,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:16,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:39:16,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:39:16,920 INFO L87 Difference]: Start difference. First operand 3625 states and 6218 transitions. Second operand 4 states. [2020-10-27 23:39:39,266 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-27 23:39:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:39:41,574 INFO L93 Difference]: Finished difference Result 7710 states and 13120 transitions. [2020-10-27 23:39:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:39:41,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 312 [2020-10-27 23:39:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:39:41,595 INFO L225 Difference]: With dead ends: 7710 [2020-10-27 23:39:41,595 INFO L226 Difference]: Without dead ends: 4973 [2020-10-27 23:39:41,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:39:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2020-10-27 23:39:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4969. [2020-10-27 23:39:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4969 states. [2020-10-27 23:39:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 8447 transitions. [2020-10-27 23:39:41,729 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 8447 transitions. Word has length 312 [2020-10-27 23:39:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:39:41,730 INFO L481 AbstractCegarLoop]: Abstraction has 4969 states and 8447 transitions. [2020-10-27 23:39:41,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:39:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 8447 transitions. [2020-10-27 23:39:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-27 23:39:41,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:39:41,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:41,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:39:41,746 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:39:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:39:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash -385116904, now seen corresponding path program 1 times [2020-10-27 23:39:41,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:39:41,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632476408] [2020-10-27 23:39:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:39:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:41,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:41,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:42,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:42,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:43,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:43,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:46,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:46,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 23:39:46,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:39:46,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-27 23:39:46,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:39:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-27 23:39:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:39:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:39:48,224 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:39:48,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:39:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:39:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:39:48,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:39:48,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:39:48,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:39:48,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 23:39:48,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:39:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:39:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:39:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:39:48,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:39:48,428 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 23:39:48,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632476408] [2020-10-27 23:39:48,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:39:48,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:39:48,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617075692] [2020-10-27 23:39:48,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:39:48,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:39:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:39:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:39:48,436 INFO L87 Difference]: Start difference. First operand 4969 states and 8447 transitions. Second operand 4 states. [2020-10-27 23:39:49,753 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 23:40:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:11,833 INFO L93 Difference]: Finished difference Result 12004 states and 20326 transitions. [2020-10-27 23:40:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:40:11,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-27 23:40:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:11,873 INFO L225 Difference]: With dead ends: 12004 [2020-10-27 23:40:11,873 INFO L226 Difference]: Without dead ends: 8687 [2020-10-27 23:40:11,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:40:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8687 states. [2020-10-27 23:40:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8687 to 8540. [2020-10-27 23:40:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8540 states. [2020-10-27 23:40:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8540 states to 8540 states and 14480 transitions. [2020-10-27 23:40:12,120 INFO L78 Accepts]: Start accepts. Automaton has 8540 states and 14480 transitions. Word has length 313 [2020-10-27 23:40:12,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:12,120 INFO L481 AbstractCegarLoop]: Abstraction has 8540 states and 14480 transitions. [2020-10-27 23:40:12,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:40:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8540 states and 14480 transitions. [2020-10-27 23:40:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-27 23:40:12,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:12,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:12,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:40:12,145 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1105138408, now seen corresponding path program 1 times [2020-10-27 23:40:12,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:12,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286242548] [2020-10-27 23:40:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:12,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:13,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:17,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:17,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:17,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 23:40:17,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:40:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-27 23:40:17,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:40:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-10-27 23:40:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 23:40:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:18,644 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:40:18,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:18,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:18,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:18,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:18,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:18,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:40:18,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:18,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:18,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:18,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:18,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:18,837 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 23:40:18,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286242548] [2020-10-27 23:40:18,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:18,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:40:18,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317588339] [2020-10-27 23:40:18,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:40:18,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:40:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:40:18,839 INFO L87 Difference]: Start difference. First operand 8540 states and 14480 transitions. Second operand 4 states. [2020-10-27 23:40:20,082 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-27 23:40:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:38,323 INFO L93 Difference]: Finished difference Result 17312 states and 29269 transitions. [2020-10-27 23:40:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:40:38,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-27 23:40:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:38,350 INFO L225 Difference]: With dead ends: 17312 [2020-10-27 23:40:38,351 INFO L226 Difference]: Without dead ends: 11930 [2020-10-27 23:40:38,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:40:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11930 states. [2020-10-27 23:40:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11930 to 11577. [2020-10-27 23:40:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11577 states. [2020-10-27 23:40:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11577 states to 11577 states and 19581 transitions. [2020-10-27 23:40:38,777 INFO L78 Accepts]: Start accepts. Automaton has 11577 states and 19581 transitions. Word has length 313 [2020-10-27 23:40:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:38,778 INFO L481 AbstractCegarLoop]: Abstraction has 11577 states and 19581 transitions. [2020-10-27 23:40:38,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:40:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 11577 states and 19581 transitions. [2020-10-27 23:40:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-27 23:40:38,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:38,803 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:38,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:40:38,804 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:38,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1439651372, now seen corresponding path program 1 times [2020-10-27 23:40:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:38,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734206240] [2020-10-27 23:40:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:39,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:39,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:40,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:41,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:43,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:43,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:43,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-27 23:40:43,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:40:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-27 23:40:43,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:40:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-27 23:40:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:40:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:45,344 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:40:45,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:45,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:45,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:45,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:45,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:40:45,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:45,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:45,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:45,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:45,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:45,579 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 23:40:45,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734206240] [2020-10-27 23:40:45,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:45,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:40:45,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730104886] [2020-10-27 23:40:45,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:40:45,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:45,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:40:45,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:40:45,581 INFO L87 Difference]: Start difference. First operand 11577 states and 19581 transitions. Second operand 4 states. [2020-10-27 23:41:01,944 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-27 23:41:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:03,481 INFO L93 Difference]: Finished difference Result 30647 states and 51778 transitions. [2020-10-27 23:41:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:03,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-10-27 23:41:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:03,527 INFO L225 Difference]: With dead ends: 30647 [2020-10-27 23:41:03,527 INFO L226 Difference]: Without dead ends: 20726 [2020-10-27 23:41:03,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20726 states. [2020-10-27 23:41:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20726 to 19963. [2020-10-27 23:41:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19963 states. [2020-10-27 23:41:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19963 states to 19963 states and 33586 transitions. [2020-10-27 23:41:04,308 INFO L78 Accepts]: Start accepts. Automaton has 19963 states and 33586 transitions. Word has length 318 [2020-10-27 23:41:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:04,309 INFO L481 AbstractCegarLoop]: Abstraction has 19963 states and 33586 transitions. [2020-10-27 23:41:04,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 19963 states and 33586 transitions. [2020-10-27 23:41:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-27 23:41:04,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:04,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:04,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:41:04,351 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash -128218590, now seen corresponding path program 1 times [2020-10-27 23:41:04,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:04,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83469391] [2020-10-27 23:41:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:04,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:06,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:09,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-27 23:41:09,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:41:09,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-27 23:41:09,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:09,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:09,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-27 23:41:09,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:41:09,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:10,841 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-27 23:41:10,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:10,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:10,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:10,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:10,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:10,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 23:41:10,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:10,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:10,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:10,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:10,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:10,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83469391] [2020-10-27 23:41:10,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:10,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:10,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660315106] [2020-10-27 23:41:10,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:10,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:10,976 INFO L87 Difference]: Start difference. First operand 19963 states and 33586 transitions. Second operand 4 states.