./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/data_structures_set_multi_proc_ground-1.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 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 21:55:08,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 21:55:08,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 21:55:08,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 21:55:08,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 21:55:08,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 21:55:08,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 21:55:08,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 21:55:08,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 21:55:08,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 21:55:08,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 21:55:08,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 21:55:08,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 21:55:08,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 21:55:08,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 21:55:08,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 21:55:08,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 21:55:08,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 21:55:08,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 21:55:08,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 21:55:08,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 21:55:08,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 21:55:08,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 21:55:08,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 21:55:08,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 21:55:08,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 21:55:08,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 21:55:08,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 21:55:08,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 21:55:08,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 21:55:08,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 21:55:08,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 21:55:08,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 21:55:08,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 21:55:08,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 21:55:08,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 21:55:08,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 21:55:08,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 21:55:08,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 21:55:08,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 21:55:08,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 21:55:08,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 21:55:08,215 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 21:55:08,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 21:55:08,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 21:55:08,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 21:55:08,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 21:55:08,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 21:55:08,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 21:55:08,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 21:55:08,217 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 21:55:08,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 21:55:08,218 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 21:55:08,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 21:55:08,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 21:55:08,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 21:55:08,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 21:55:08,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 21:55:08,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 21:55:08,219 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 21:55:08,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 21:55:08,220 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 21:55:08,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 21:55:08,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 21:55:08,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 21:55:08,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 21:55:08,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:08,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 21:55:08,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 21:55:08,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 21:55:08,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 21:55:08,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 21:55:08,222 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 21:55:08,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 21:55:08,222 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 21:55:08,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 21:55:08,222 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 21:55:08,223 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2023-02-13 21:55:08,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 21:55:08,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 21:55:08,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 21:55:08,438 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 21:55:08,438 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 21:55:08,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-02-13 21:55:09,386 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 21:55:09,546 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 21:55:09,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-02-13 21:55:09,550 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c74dc27/02d6a9e7aa234577803d4477d61aadd2/FLAG2212df37f [2023-02-13 21:55:09,559 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c74dc27/02d6a9e7aa234577803d4477d61aadd2 [2023-02-13 21:55:09,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 21:55:09,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 21:55:09,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:09,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 21:55:09,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 21:55:09,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ef4191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09, skipping insertion in model container [2023-02-13 21:55:09,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 21:55:09,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 21:55:09,664 WARN L237 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/data_structures_set_multi_proc_ground-1.i[832,845] [2023-02-13 21:55:09,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:09,681 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 21:55:09,688 WARN L237 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/data_structures_set_multi_proc_ground-1.i[832,845] [2023-02-13 21:55:09,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:09,703 INFO L208 MainTranslator]: Completed translation [2023-02-13 21:55:09,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09 WrapperNode [2023-02-13 21:55:09,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:09,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:09,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 21:55:09,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 21:55:09,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,735 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2023-02-13 21:55:09,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:09,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 21:55:09,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 21:55:09,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 21:55:09,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,763 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 21:55:09,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 21:55:09,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 21:55:09,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 21:55:09,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:09,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:09,814 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) [2023-02-13 21:55:09,832 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 [2023-02-13 21:55:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 21:55:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 21:55:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 21:55:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 21:55:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 21:55:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 21:55:09,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 21:55:09,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-13 21:55:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-13 21:55:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 21:55:09,894 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 21:55:09,900 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 21:55:10,051 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 21:55:10,055 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 21:55:10,055 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2023-02-13 21:55:10,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10 BoogieIcfgContainer [2023-02-13 21:55:10,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 21:55:10,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 21:55:10,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 21:55:10,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 21:55:10,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 09:55:09" (1/3) ... [2023-02-13 21:55:10,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447bfa25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (2/3) ... [2023-02-13 21:55:10,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447bfa25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10" (3/3) ... [2023-02-13 21:55:10,091 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2023-02-13 21:55:10,110 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 21:55:10,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 21:55:10,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 21:55:10,155 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b23e05b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 21:55:10,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 21:55:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 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) [2023-02-13 21:55:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-13 21:55:10,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1976888394, now seen corresponding path program 1 times [2023-02-13 21:55:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:10,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335314709] [2023-02-13 21:55:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335314709] [2023-02-13 21:55:10,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335314709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:10,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:10,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 21:55:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573934155] [2023-02-13 21:55:10,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:10,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:10,444 INFO L87 Difference]: Start difference. First operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-13 21:55:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:10,522 INFO L93 Difference]: Finished difference Result 110 states and 169 transitions. [2023-02-13 21:55:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2023-02-13 21:55:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:10,529 INFO L225 Difference]: With dead ends: 110 [2023-02-13 21:55:10,529 INFO L226 Difference]: Without dead ends: 65 [2023-02-13 21:55:10,531 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 [2023-02-13 21:55:10,533 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:10,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-13 21:55:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2023-02-13 21:55:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 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) [2023-02-13 21:55:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-02-13 21:55:10,565 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2023-02-13 21:55:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:10,565 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-02-13 21:55:10,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-13 21:55:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-02-13 21:55:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-13 21:55:10,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 21:55:10,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1321690828, now seen corresponding path program 1 times [2023-02-13 21:55:10,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:10,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266638585] [2023-02-13 21:55:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:10,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:10,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266638585] [2023-02-13 21:55:10,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266638585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:10,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43910728] [2023-02-13 21:55:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:10,638 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) [2023-02-13 21:55:10,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 21:55:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 21:55:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:10,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:10,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43910728] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:10,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:10,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 21:55:10,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209769902] [2023-02-13 21:55:10,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:10,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 21:55:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 21:55:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:10,727 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-13 21:55:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:10,857 INFO L93 Difference]: Finished difference Result 181 states and 243 transitions. [2023-02-13 21:55:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:10,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 12 [2023-02-13 21:55:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:10,863 INFO L225 Difference]: With dead ends: 181 [2023-02-13 21:55:10,863 INFO L226 Difference]: Without dead ends: 148 [2023-02-13 21:55:10,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:10,864 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:10,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 202 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-13 21:55:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 44. [2023-02-13 21:55:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 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) [2023-02-13 21:55:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-13 21:55:10,872 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 12 [2023-02-13 21:55:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:10,872 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-13 21:55:10,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-13 21:55:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-13 21:55:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-13 21:55:10,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,873 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 21:55:11,078 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 [2023-02-13 21:55:11,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash -202652846, now seen corresponding path program 2 times [2023-02-13 21:55:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004384393] [2023-02-13 21:55:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 21:55:11,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004384393] [2023-02-13 21:55:11,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004384393] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:11,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667731116] [2023-02-13 21:55:11,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:11,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:11,190 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-13 21:55:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,220 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2023-02-13 21:55:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 [2023-02-13 21:55:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,224 INFO L225 Difference]: With dead ends: 82 [2023-02-13 21:55:11,225 INFO L226 Difference]: Without dead ends: 48 [2023-02-13 21:55:11,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:11,226 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-13 21:55:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-13 21:55:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-02-13 21:55:11,231 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 18 [2023-02-13 21:55:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,231 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-02-13 21:55:11,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-13 21:55:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-02-13 21:55:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-13 21:55:11,232 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,232 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 21:55:11,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1069304186, now seen corresponding path program 1 times [2023-02-13 21:55:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135920853] [2023-02-13 21:55:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135920853] [2023-02-13 21:55:11,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135920853] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 21:55:11,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26019216] [2023-02-13 21:55:11,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:11,299 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2023-02-13 21:55:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,313 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2023-02-13 21:55:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 31 [2023-02-13 21:55:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,313 INFO L225 Difference]: With dead ends: 90 [2023-02-13 21:55:11,313 INFO L226 Difference]: Without dead ends: 59 [2023-02-13 21:55:11,314 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 [2023-02-13 21:55:11,314 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-13 21:55:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2023-02-13 21:55:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-02-13 21:55:11,327 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 31 [2023-02-13 21:55:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,327 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-02-13 21:55:11,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2023-02-13 21:55:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-02-13 21:55:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-13 21:55:11,329 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,329 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-13 21:55:11,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1327947132, now seen corresponding path program 1 times [2023-02-13 21:55:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197396404] [2023-02-13 21:55:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:11,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197396404] [2023-02-13 21:55:11,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197396404] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476761255] [2023-02-13 21:55:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:11,409 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) [2023-02-13 21:55:11,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 21:55:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 21:55:11,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:11,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:11,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476761255] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:11,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:11,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-13 21:55:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770229823] [2023-02-13 21:55:11,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 21:55:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 21:55:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-13 21:55:11,602 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2023-02-13 21:55:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,733 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2023-02-13 21:55:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-13 21:55:11,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 33 [2023-02-13 21:55:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,737 INFO L225 Difference]: With dead ends: 187 [2023-02-13 21:55:11,737 INFO L226 Difference]: Without dead ends: 150 [2023-02-13 21:55:11,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2023-02-13 21:55:11,740 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 168 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 176 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-13 21:55:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 72. [2023-02-13 21:55:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-02-13 21:55:11,760 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 33 [2023-02-13 21:55:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,761 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-02-13 21:55:11,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2023-02-13 21:55:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-02-13 21:55:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-13 21:55:11,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,764 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-13 21:55:11,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,969 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1439765920, now seen corresponding path program 1 times [2023-02-13 21:55:11,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833438011] [2023-02-13 21:55:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-02-13 21:55:12,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833438011] [2023-02-13 21:55:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833438011] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:12,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:12,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:12,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550611217] [2023-02-13 21:55:12,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:12,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:12,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:12,095 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-13 21:55:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,106 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2023-02-13 21:55:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:12,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 53 [2023-02-13 21:55:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,108 INFO L225 Difference]: With dead ends: 94 [2023-02-13 21:55:12,108 INFO L226 Difference]: Without dead ends: 64 [2023-02-13 21:55:12,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:12,112 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-13 21:55:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-02-13 21:55:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2023-02-13 21:55:12,124 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2023-02-13 21:55:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,125 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2023-02-13 21:55:12,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-13 21:55:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2023-02-13 21:55:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-13 21:55:12,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,129 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-13 21:55:12,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1385301982, now seen corresponding path program 2 times [2023-02-13 21:55:12,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597294848] [2023-02-13 21:55:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:12,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597294848] [2023-02-13 21:55:12,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597294848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003955012] [2023-02-13 21:55:12,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:12,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:12,345 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) [2023-02-13 21:55:12,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 21:55:12,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:12,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 21:55:12,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:12,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003955012] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:12,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:12,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-13 21:55:12,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998859302] [2023-02-13 21:55:12,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-13 21:55:12,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-13 21:55:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:12,630 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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) [2023-02-13 21:55:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,804 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2023-02-13 21:55:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 21:55:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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 54 [2023-02-13 21:55:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,806 INFO L225 Difference]: With dead ends: 261 [2023-02-13 21:55:12,806 INFO L226 Difference]: Without dead ends: 220 [2023-02-13 21:55:12,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:12,807 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 248 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 187 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-02-13 21:55:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 88. [2023-02-13 21:55:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2023-02-13 21:55:12,815 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 54 [2023-02-13 21:55:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2023-02-13 21:55:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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) [2023-02-13 21:55:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2023-02-13 21:55:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-13 21:55:12,815 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,815 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:13,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash 359833914, now seen corresponding path program 3 times [2023-02-13 21:55:13,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134468358] [2023-02-13 21:55:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:13,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134468358] [2023-02-13 21:55:13,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134468358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:13,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113958836] [2023-02-13 21:55:13,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:13,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:13,456 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) [2023-02-13 21:55:13,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 21:55:13,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 21:55:13,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:13,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 21:55:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-02-13 21:55:13,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-02-13 21:55:13,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113958836] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:13,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:13,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2023-02-13 21:55:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613181760] [2023-02-13 21:55:13,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-13 21:55:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-13 21:55:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-02-13 21:55:13,623 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 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) [2023-02-13 21:55:13,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,875 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2023-02-13 21:55:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-13 21:55:13,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 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 78 [2023-02-13 21:55:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,877 INFO L225 Difference]: With dead ends: 314 [2023-02-13 21:55:13,877 INFO L226 Difference]: Without dead ends: 273 [2023-02-13 21:55:13,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2023-02-13 21:55:13,878 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 565 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 379 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-02-13 21:55:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 134. [2023-02-13 21:55:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 131 states have internal predecessors, (148), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2023-02-13 21:55:13,888 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 78 [2023-02-13 21:55:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,888 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2023-02-13 21:55:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 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) [2023-02-13 21:55:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2023-02-13 21:55:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-13 21:55:13,889 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,889 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 21:55:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:14,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 140841668, now seen corresponding path program 4 times [2023-02-13 21:55:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:14,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273996832] [2023-02-13 21:55:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-02-13 21:55:14,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273996832] [2023-02-13 21:55:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273996832] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808747637] [2023-02-13 21:55:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:55:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:14,730 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) [2023-02-13 21:55:14,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 21:55:14,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:55:14,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:14,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-13 21:55:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-02-13 21:55:14,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-02-13 21:55:15,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808747637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:15,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:15,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-13 21:55:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502499054] [2023-02-13 21:55:15,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:15,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-13 21:55:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-13 21:55:15,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-13 21:55:15,569 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 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) [2023-02-13 21:55:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:16,084 INFO L93 Difference]: Finished difference Result 557 states and 709 transitions. [2023-02-13 21:55:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-13 21:55:16,084 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 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 116 [2023-02-13 21:55:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:16,086 INFO L225 Difference]: With dead ends: 557 [2023-02-13 21:55:16,086 INFO L226 Difference]: Without dead ends: 472 [2023-02-13 21:55:16,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-13 21:55:16,088 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 694 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:16,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 317 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 21:55:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-02-13 21:55:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 184. [2023-02-13 21:55:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.0939226519337018) internal successors, (198), 181 states have internal predecessors, (198), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2023-02-13 21:55:16,100 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 116 [2023-02-13 21:55:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:16,101 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2023-02-13 21:55:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 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) [2023-02-13 21:55:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2023-02-13 21:55:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-02-13 21:55:16,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:16,102 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:16,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:16,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2022982902, now seen corresponding path program 5 times [2023-02-13 21:55:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:16,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220005076] [2023-02-13 21:55:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:16,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-02-13 21:55:17,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220005076] [2023-02-13 21:55:17,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220005076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300716384] [2023-02-13 21:55:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 21:55:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:17,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:17,855 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) [2023-02-13 21:55:17,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process