./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:25:41,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:25:41,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:25:41,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:25:41,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:25:41,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:25:41,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:25:41,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:25:41,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:25:41,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:25:41,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:25:41,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:25:41,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:25:41,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:25:41,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:25:41,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:25:41,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:25:41,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:25:41,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:25:41,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:25:41,754 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:25:41,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:25:41,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:25:41,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:25:41,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:25:41,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:25:41,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:25:41,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:25:41,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:25:41,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:25:41,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:25:41,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:25:41,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:25:41,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:25:41,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:25:41,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:25:41,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:25:41,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:25:41,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:25:41,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:25:41,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:25:41,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:25:41,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:25:41,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:25:41,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:25:41,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:25:41,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:25:41,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:25:41,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:25:41,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:25:41,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:25:41,806 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:25:41,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:25:41,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:25:41,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:25:41,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:25:41,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:25:41,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:25:41,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:25:41,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:25:41,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:25:41,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:25:41,810 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:25:41,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:25:41,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:25:41,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:25:41,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:25:41,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:25:41,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:25:41,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:25:41,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:25:41,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:25:41,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:25:41,812 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:25:41,812 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:25:41,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:25:41,812 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b [2022-07-20 20:25:42,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:25:42,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:25:42,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:25:42,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:25:42,083 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:25:42,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2022-07-20 20:25:42,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d662d25d9/67ce496255f44569866908e799773de3/FLAG3774d9246 [2022-07-20 20:25:42,550 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:25:42,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2022-07-20 20:25:42,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d662d25d9/67ce496255f44569866908e799773de3/FLAG3774d9246 [2022-07-20 20:25:42,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d662d25d9/67ce496255f44569866908e799773de3 [2022-07-20 20:25:42,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:25:42,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:25:42,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:25:42,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:25:42,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:25:42,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:25:42" (1/1) ... [2022-07-20 20:25:42,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb278a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:42, skipping insertion in model container [2022-07-20 20:25:42,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:25:42" (1/1) ... [2022-07-20 20:25:42,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:25:42,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:25:43,087 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2022-07-20 20:25:43,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:25:43,109 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:25:43,119 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2022-07-20 20:25:43,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:25:43,152 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:25:43,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43 WrapperNode [2022-07-20 20:25:43,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:25:43,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:25:43,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:25:43,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:25:43,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,224 INFO L137 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 93 [2022-07-20 20:25:43,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:25:43,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:25:43,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:25:43,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:25:43,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:25:43,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:25:43,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:25:43,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:25:43,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (1/1) ... [2022-07-20 20:25:43,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:25:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:25:43,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 20:25:43,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 20:25:43,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:25:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:25:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:25:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:25:43,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:25:43,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:25:43,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:25:43,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 20:25:43,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 20:25:43,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:25:43,384 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:25:43,385 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:25:43,508 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:25:43,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:25:43,513 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 20:25:43,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:25:43 BoogieIcfgContainer [2022-07-20 20:25:43,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:25:43,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:25:43,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:25:43,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:25:43,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:25:42" (1/3) ... [2022-07-20 20:25:43,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec4d195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:25:43, skipping insertion in model container [2022-07-20 20:25:43,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:25:43" (2/3) ... [2022-07-20 20:25:43,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec4d195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:25:43, skipping insertion in model container [2022-07-20 20:25:43,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:25:43" (3/3) ... [2022-07-20 20:25:43,542 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2022-07-20 20:25:43,562 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:25:43,563 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:25:43,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:25:43,631 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68f9113d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@564436f [2022-07-20 20:25:43,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:25:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:25:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 20:25:43,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:25:43,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:25:43,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:25:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:25:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash -751891331, now seen corresponding path program 1 times [2022-07-20 20:25:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:25:43,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357475302] [2022-07-20 20:25:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:43,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:25:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:25:43,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:25:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357475302] [2022-07-20 20:25:43,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357475302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:25:43,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:25:43,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:25:43,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898234516] [2022-07-20 20:25:43,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:25:43,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:25:43,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:25:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:25:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:25:43,804 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:25:43,840 INFO L93 Difference]: Finished difference Result 62 states and 90 transitions. [2022-07-20 20:25:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:25:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 20:25:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:25:43,850 INFO L225 Difference]: With dead ends: 62 [2022-07-20 20:25:43,850 INFO L226 Difference]: Without dead ends: 30 [2022-07-20 20:25:43,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:25:43,859 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:25:43,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:25:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-20 20:25:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-07-20 20:25:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:25:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-20 20:25:43,892 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 13 [2022-07-20 20:25:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:25:43,893 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-20 20:25:43,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-20 20:25:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 20:25:43,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:25:43,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:25:43,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:25:43,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:25:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:25:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash -431376725, now seen corresponding path program 1 times [2022-07-20 20:25:43,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:25:43,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588400322] [2022-07-20 20:25:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:43,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:25:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:25:43,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:25:43,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588400322] [2022-07-20 20:25:43,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588400322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:25:43,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016922177] [2022-07-20 20:25:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:43,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:25:43,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:25:43,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:25:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 20:25:44,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:25:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:25:44,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 20:25:44,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016922177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:25:44,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 20:25:44,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-20 20:25:44,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805022658] [2022-07-20 20:25:44,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:25:44,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:25:44,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:25:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:25:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:25:44,065 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:25:44,103 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-20 20:25:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:25:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 20:25:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:25:44,108 INFO L225 Difference]: With dead ends: 51 [2022-07-20 20:25:44,109 INFO L226 Difference]: Without dead ends: 34 [2022-07-20 20:25:44,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:25:44,112 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:25:44,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:25:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-20 20:25:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-07-20 20:25:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:25:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-20 20:25:44,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-07-20 20:25:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:25:44,125 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-20 20:25:44,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-20 20:25:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 20:25:44,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:25:44,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:25:44,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 20:25:44,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:44,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:25:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:25:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1763712837, now seen corresponding path program 1 times [2022-07-20 20:25:44,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:25:44,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469160438] [2022-07-20 20:25:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:25:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:25:44,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:25:44,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469160438] [2022-07-20 20:25:44,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469160438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:25:44,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111732420] [2022-07-20 20:25:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:44,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:44,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:25:44,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:25:44,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:25:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:25:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:25:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:25:44,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:25:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:25:44,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111732420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:25:44,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:25:44,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:25:44,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869463795] [2022-07-20 20:25:44,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:25:44,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:25:44,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:25:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:25:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:25:44,535 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:25:44,594 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2022-07-20 20:25:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:25:44,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 20:25:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:25:44,597 INFO L225 Difference]: With dead ends: 65 [2022-07-20 20:25:44,597 INFO L226 Difference]: Without dead ends: 40 [2022-07-20 20:25:44,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:25:44,601 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:25:44,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 80 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:25:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-20 20:25:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-20 20:25:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:25:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-07-20 20:25:44,619 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 18 [2022-07-20 20:25:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:25:44,619 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-07-20 20:25:44,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-07-20 20:25:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 20:25:44,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:25:44,621 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:25:44,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:25:44,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-20 20:25:44,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:25:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:25:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1149964965, now seen corresponding path program 2 times [2022-07-20 20:25:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:25:44,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188539552] [2022-07-20 20:25:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:44,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:25:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 20:25:44,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:25:44,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188539552] [2022-07-20 20:25:44,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188539552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:25:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126643507] [2022-07-20 20:25:44,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:25:44,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:25:44,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:25:44,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:25:44,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:25:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:25:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:25:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:25:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 20:25:45,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:25:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 20:25:45,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126643507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:25:45,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:25:45,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2022-07-20 20:25:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068039844] [2022-07-20 20:25:45,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:25:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 20:25:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:25:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 20:25:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:25:45,099 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:25:45,200 INFO L93 Difference]: Finished difference Result 105 states and 148 transitions. [2022-07-20 20:25:45,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 20:25:45,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 20:25:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:25:45,201 INFO L225 Difference]: With dead ends: 105 [2022-07-20 20:25:45,201 INFO L226 Difference]: Without dead ends: 76 [2022-07-20 20:25:45,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:25:45,203 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:25:45,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 158 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:25:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-20 20:25:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-20 20:25:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:25:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-07-20 20:25:45,212 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 27 [2022-07-20 20:25:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:25:45,212 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-07-20 20:25:45,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-07-20 20:25:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 20:25:45,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:25:45,214 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:25:45,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:25:45,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:45,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:25:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:25:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1960305241, now seen corresponding path program 3 times [2022-07-20 20:25:45,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:25:45,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177009001] [2022-07-20 20:25:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:25:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-20 20:25:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:25:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177009001] [2022-07-20 20:25:45,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177009001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:25:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897134716] [2022-07-20 20:25:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:25:45,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:25:45,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:25:45,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:25:45,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 20:25:45,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:25:45,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 20:25:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:25:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:25:45,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:25:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:25:46,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897134716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:25:46,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:25:46,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 22 [2022-07-20 20:25:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203771883] [2022-07-20 20:25:46,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:25:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 20:25:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:25:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 20:25:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-20 20:25:46,032 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 22 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 22 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:25:46,220 INFO L93 Difference]: Finished difference Result 189 states and 272 transitions. [2022-07-20 20:25:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 20:25:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 22 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-20 20:25:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:25:46,222 INFO L225 Difference]: With dead ends: 189 [2022-07-20 20:25:46,223 INFO L226 Difference]: Without dead ends: 136 [2022-07-20 20:25:46,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-20 20:25:46,224 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 237 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:25:46,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 119 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:25:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-20 20:25:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-07-20 20:25:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 132 states have internal predecessors, (174), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:25:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2022-07-20 20:25:46,235 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 57 [2022-07-20 20:25:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:25:46,235 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2022-07-20 20:25:46,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 22 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2022-07-20 20:25:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 20:25:46,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:25:46,238 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:25:46,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 20:25:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:46,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:25:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:25:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2113477765, now seen corresponding path program 4 times [2022-07-20 20:25:46,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:25:46,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567374093] [2022-07-20 20:25:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:25:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2022-07-20 20:25:46,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:25:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567374093] [2022-07-20 20:25:46,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567374093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:25:46,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581248555] [2022-07-20 20:25:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:25:46,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:46,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:25:46,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:25:46,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:25:46,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:25:46,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:25:46,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 20:25:46,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:25:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2022-07-20 20:25:47,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:25:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2022-07-20 20:25:47,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581248555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:25:47,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:25:47,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-07-20 20:25:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684834957] [2022-07-20 20:25:47,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:25:47,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 20:25:47,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:25:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 20:25:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 20:25:47,632 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:25:48,150 INFO L93 Difference]: Finished difference Result 361 states and 532 transitions. [2022-07-20 20:25:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-20 20:25:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-07-20 20:25:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:25:48,154 INFO L225 Difference]: With dead ends: 361 [2022-07-20 20:25:48,155 INFO L226 Difference]: Without dead ends: 268 [2022-07-20 20:25:48,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 20:25:48,162 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 698 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 20:25:48,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 166 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 20:25:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-20 20:25:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-07-20 20:25:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 264 states have (on average 1.3257575757575757) internal successors, (350), 264 states have internal predecessors, (350), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:25:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 354 transitions. [2022-07-20 20:25:48,195 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 354 transitions. Word has length 107 [2022-07-20 20:25:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:25:48,197 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 354 transitions. [2022-07-20 20:25:48,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:25:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 354 transitions. [2022-07-20 20:25:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-20 20:25:48,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:25:48,206 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:25:48,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:25:48,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:48,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:25:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:25:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2000652775, now seen corresponding path program 5 times [2022-07-20 20:25:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:25:48,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688616467] [2022-07-20 20:25:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:25:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:25:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:25:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-07-20 20:25:49,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:25:49,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688616467] [2022-07-20 20:25:49,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688616467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:25:49,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384645357] [2022-07-20 20:25:49,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:25:49,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:25:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:25:49,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:25:49,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:26:22,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2022-07-20 20:26:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:26:22,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 20:26:22,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:26:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-07-20 20:26:22,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:26:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-07-20 20:26:24,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384645357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:26:24,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:26:24,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 86 [2022-07-20 20:26:24,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112907518] [2022-07-20 20:26:24,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:26:24,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 20:26:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:26:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 20:26:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2022-07-20 20:26:24,528 INFO L87 Difference]: Start difference. First operand 268 states and 354 transitions. Second operand has 86 states, 86 states have (on average 4.058139534883721) internal successors, (349), 86 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:26:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:26:25,940 INFO L93 Difference]: Finished difference Result 701 states and 1040 transitions. [2022-07-20 20:26:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-20 20:26:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.058139534883721) internal successors, (349), 86 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-07-20 20:26:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:26:25,949 INFO L225 Difference]: With dead ends: 701 [2022-07-20 20:26:25,949 INFO L226 Difference]: Without dead ends: 520 [2022-07-20 20:26:25,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2022-07-20 20:26:25,952 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1478 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 20:26:25,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 256 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 20:26:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-20 20:26:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-07-20 20:26:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 516 states have (on average 1.3294573643410852) internal successors, (686), 516 states have internal predecessors, (686), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 20:26:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 690 transitions. [2022-07-20 20:26:25,969 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 690 transitions. Word has length 217 [2022-07-20 20:26:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:26:25,969 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 690 transitions. [2022-07-20 20:26:25,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.058139534883721) internal successors, (349), 86 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:26:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 690 transitions. [2022-07-20 20:26:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-20 20:26:25,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:26:25,975 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:26:26,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 20:26:26,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:26:26,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:26:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:26:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1429388283, now seen corresponding path program 6 times [2022-07-20 20:26:26,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:26:26,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884599953] [2022-07-20 20:26:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:26:26,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:26:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:26:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17101 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10045 trivial. 0 not checked. [2022-07-20 20:26:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:26:28,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884599953] [2022-07-20 20:26:28,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884599953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:26:28,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797998534] [2022-07-20 20:26:28,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:26:28,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:26:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:26:28,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:26:28,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process