./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/phases_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/loop-acceleration/phases_1-2.c -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 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:20:16,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:20:16,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:20:16,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:20:16,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:20:16,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:20:16,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:20:16,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:20:16,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:20:16,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:20:16,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:20:16,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:20:16,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:20:16,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:20:16,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:20:16,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:20:16,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:20:16,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:20:16,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:20:16,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:20:16,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:20:16,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:20:16,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:20:16,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:20:16,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:20:16,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:20:16,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:20:16,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:20:16,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:20:16,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:20:16,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:20:16,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:20:16,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:20:16,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:20:16,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:20:16,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:20:16,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:20:16,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:20:16,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:20:16,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:20:16,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:20:16,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:20:16,808 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:20:16,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:20:16,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:20:16,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:20:16,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:20:16,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:20:16,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:20:16,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:20:16,811 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:20:16,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:20:16,812 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:20:16,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:20:16,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:20:16,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:20:16,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:20:16,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:20:16,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:20:16,813 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:20:16,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:20:16,813 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:20:16,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:20:16,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:20:16,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:20:16,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:20:16,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:20:16,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:20:16,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:20:16,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:20:16,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:20:16,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:20:16,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:20:16,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:20:16,815 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:20:16,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:20:16,815 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:20:16,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 [2023-02-16 01:20:17,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:20:17,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:20:17,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:20:17,027 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:20:17,028 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:20:17,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2023-02-16 01:20:17,905 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:20:18,085 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:20:18,086 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2023-02-16 01:20:18,090 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4039be0/ddda5760347843978e198df7355b0ae8/FLAG66d1dbdff [2023-02-16 01:20:18,108 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4039be0/ddda5760347843978e198df7355b0ae8 [2023-02-16 01:20:18,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:20:18,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:20:18,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:20:18,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:20:18,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:20:18,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2311b294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18, skipping insertion in model container [2023-02-16 01:20:18,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:20:18,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:20:18,231 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/loop-acceleration/phases_1-2.c[322,335] [2023-02-16 01:20:18,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:20:18,249 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:20:18,257 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/loop-acceleration/phases_1-2.c[322,335] [2023-02-16 01:20:18,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:20:18,269 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:20:18,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18 WrapperNode [2023-02-16 01:20:18,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:20:18,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:20:18,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:20:18,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:20:18,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,287 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2023-02-16 01:20:18,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:20:18,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:20:18,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:20:18,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:20:18,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:20:18,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:20:18,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:20:18,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:20:18,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (1/1) ... [2023-02-16 01:20:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:20:18,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:20:18,327 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) [2023-02-16 01:20:18,333 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 [2023-02-16 01:20:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:20:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:20:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:20:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:20:18,392 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:20:18,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:20:18,469 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:20:18,472 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:20:18,472 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-16 01:20:18,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:20:18 BoogieIcfgContainer [2023-02-16 01:20:18,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:20:18,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:20:18,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:20:18,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:20:18,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:20:18" (1/3) ... [2023-02-16 01:20:18,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb02b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:20:18, skipping insertion in model container [2023-02-16 01:20:18,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:20:18" (2/3) ... [2023-02-16 01:20:18,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb02b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:20:18, skipping insertion in model container [2023-02-16 01:20:18,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:20:18" (3/3) ... [2023-02-16 01:20:18,480 INFO L112 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2023-02-16 01:20:18,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:20:18,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:20:18,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:20:18,568 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;@1bb418e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:20:18,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:20:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 01:20:18,600 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:18,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 01:20:18,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2023-02-16 01:20:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299879966] [2023-02-16 01:20:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:18,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299879966] [2023-02-16 01:20:18,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299879966] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:20:18,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:20:18,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:20:18,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961063027] [2023-02-16 01:20:18,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:20:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:20:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:20:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:20:18,709 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:20:18,718 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-02-16 01:20:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:20:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-16 01:20:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:20:18,724 INFO L225 Difference]: With dead ends: 20 [2023-02-16 01:20:18,724 INFO L226 Difference]: Without dead ends: 8 [2023-02-16 01:20:18,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:20:18,728 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:20:18,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:20:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-02-16 01:20:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-02-16 01:20:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-02-16 01:20:18,745 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2023-02-16 01:20:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:20:18,746 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-02-16 01:20:18,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-02-16 01:20:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 01:20:18,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:18,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 01:20:18,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:20:18,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:18,747 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2023-02-16 01:20:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:18,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792081796] [2023-02-16 01:20:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:18,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:18,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:18,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792081796] [2023-02-16 01:20:18,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792081796] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:20:18,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:20:18,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:20:18,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232007445] [2023-02-16 01:20:18,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:20:18,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:20:18,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:20:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:20:18,824 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:20:18,836 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-02-16 01:20:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:20:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-16 01:20:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:20:18,837 INFO L225 Difference]: With dead ends: 16 [2023-02-16 01:20:18,837 INFO L226 Difference]: Without dead ends: 10 [2023-02-16 01:20:18,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:20:18,838 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:20:18,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:20:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-16 01:20:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-16 01:20:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-16 01:20:18,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2023-02-16 01:20:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:20:18,841 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-16 01:20:18,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-16 01:20:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 01:20:18,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:18,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:20:18,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:20:18,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2023-02-16 01:20:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013334370] [2023-02-16 01:20:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:18,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013334370] [2023-02-16 01:20:18,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013334370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:20:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183937875] [2023-02-16 01:20:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:18,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:18,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:20:18,974 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) [2023-02-16 01:20:18,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:20:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 01:20:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:20:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:19,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:20:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183937875] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:20:19,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:20:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-16 01:20:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205609610] [2023-02-16 01:20:19,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:20:19,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 01:20:19,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:19,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 01:20:19,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-16 01:20:19,071 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:20:19,132 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2023-02-16 01:20:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:20:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 01:20:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:20:19,134 INFO L225 Difference]: With dead ends: 20 [2023-02-16 01:20:19,134 INFO L226 Difference]: Without dead ends: 14 [2023-02-16 01:20:19,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:20:19,137 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:20:19,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:20:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-16 01:20:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-02-16 01:20:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-16 01:20:19,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2023-02-16 01:20:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:20:19,147 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-16 01:20:19,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-16 01:20:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 01:20:19,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:19,148 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:20:19,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 01:20:19,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:19,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:19,349 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2023-02-16 01:20:19,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:19,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678481673] [2023-02-16 01:20:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:19,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:19,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:19,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678481673] [2023-02-16 01:20:19,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678481673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:20:19,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255873047] [2023-02-16 01:20:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:19,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:19,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:20:19,473 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) [2023-02-16 01:20:19,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:20:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:19,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 01:20:19,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:20:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:19,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:20:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:20:19,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255873047] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:20:19,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:20:19,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2023-02-16 01:20:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697526933] [2023-02-16 01:20:19,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:20:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 01:20:19,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 01:20:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:20:19,654 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:20:19,763 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-02-16 01:20:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:20:19,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 01:20:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:20:19,765 INFO L225 Difference]: With dead ends: 26 [2023-02-16 01:20:19,765 INFO L226 Difference]: Without dead ends: 19 [2023-02-16 01:20:19,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:20:19,766 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:20:19,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:20:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-16 01:20:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-16 01:20:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-02-16 01:20:19,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2023-02-16 01:20:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:20:19,770 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-02-16 01:20:19,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-02-16 01:20:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 01:20:19,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:19,770 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-16 01:20:19,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:20:19,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-16 01:20:19,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash -549258615, now seen corresponding path program 2 times [2023-02-16 01:20:19,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:19,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609060939] [2023-02-16 01:20:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:19,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:20:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609060939] [2023-02-16 01:20:20,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609060939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:20:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643345790] [2023-02-16 01:20:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:20:20,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:20,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:20:20,103 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) [2023-02-16 01:20:20,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:20:20,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:20:20,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:20:20,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 01:20:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:20:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:20:20,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:20:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:20:20,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643345790] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:20:20,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:20:20,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 14 [2023-02-16 01:20:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273871755] [2023-02-16 01:20:20,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:20:20,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:20:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:20:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:20:20,311 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:20:20,828 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-02-16 01:20:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:20:20,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-16 01:20:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:20:20,829 INFO L225 Difference]: With dead ends: 42 [2023-02-16 01:20:20,829 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 01:20:20,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2023-02-16 01:20:20,830 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:20:20,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:20:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 01:20:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-16 01:20:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-02-16 01:20:20,834 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2023-02-16 01:20:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:20:20,834 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-02-16 01:20:20,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-02-16 01:20:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 01:20:20,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:20,835 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 3, 1, 1, 1, 1, 1, 1] [2023-02-16 01:20:20,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 01:20:21,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:21,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash 199938843, now seen corresponding path program 3 times [2023-02-16 01:20:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:21,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129329897] [2023-02-16 01:20:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:20:21,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:21,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129329897] [2023-02-16 01:20:21,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129329897] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:20:21,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99843849] [2023-02-16 01:20:21,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:20:21,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:21,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:20:21,244 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) [2023-02-16 01:20:21,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:20:21,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-16 01:20:21,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:20:21,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 01:20:21,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:20:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 01:20:21,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:20:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 01:20:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99843849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:20:21,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:20:21,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 9] total 23 [2023-02-16 01:20:21,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820141288] [2023-02-16 01:20:21,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:20:21,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 01:20:21,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 01:20:21,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2023-02-16 01:20:21,759 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:20:22,883 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-02-16 01:20:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 01:20:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-16 01:20:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:20:22,884 INFO L225 Difference]: With dead ends: 58 [2023-02-16 01:20:22,884 INFO L226 Difference]: Without dead ends: 45 [2023-02-16 01:20:22,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=311, Invalid=681, Unknown=0, NotChecked=0, Total=992 [2023-02-16 01:20:22,885 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:20:22,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:20:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-16 01:20:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2023-02-16 01:20:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-02-16 01:20:22,890 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 30 [2023-02-16 01:20:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:20:22,891 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-02-16 01:20:22,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-02-16 01:20:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-16 01:20:22,892 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:22,892 INFO L195 NwaCegarLoop]: trace histogram [18, 10, 8, 1, 1, 1, 1, 1, 1] [2023-02-16 01:20:22,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-16 01:20:23,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:23,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash 24586039, now seen corresponding path program 4 times [2023-02-16 01:20:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:23,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761110784] [2023-02-16 01:20:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:23,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 165 proven. 110 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 01:20:23,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761110784] [2023-02-16 01:20:23,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761110784] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:20:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097017485] [2023-02-16 01:20:23,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:20:23,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:23,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:20:23,323 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) [2023-02-16 01:20:23,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:20:23,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:20:23,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:20:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 01:20:23,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:20:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 126 proven. 182 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 01:20:23,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:20:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 126 proven. 182 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 01:20:23,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097017485] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:20:23,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:20:23,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 17] total 32 [2023-02-16 01:20:23,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728703480] [2023-02-16 01:20:23,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:20:23,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 01:20:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 01:20:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2023-02-16 01:20:23,907 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:20:36,448 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2023-02-16 01:20:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 01:20:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-16 01:20:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:20:36,449 INFO L225 Difference]: With dead ends: 94 [2023-02-16 01:20:36,449 INFO L226 Difference]: Without dead ends: 73 [2023-02-16 01:20:36,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=746, Invalid=1324, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 01:20:36,451 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:20:36,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:20:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-16 01:20:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-02-16 01:20:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2023-02-16 01:20:36,464 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 42 [2023-02-16 01:20:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:20:36,465 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2023-02-16 01:20:36,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2023-02-16 01:20:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-16 01:20:36,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:20:36,467 INFO L195 NwaCegarLoop]: trace histogram [33, 25, 8, 1, 1, 1, 1, 1, 1] [2023-02-16 01:20:36,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 01:20:36,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:36,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:20:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:20:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash -888911612, now seen corresponding path program 5 times [2023-02-16 01:20:36,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:20:36,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863781695] [2023-02-16 01:20:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:20:36,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:20:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:20:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 650 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 01:20:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:20:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863781695] [2023-02-16 01:20:37,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863781695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:20:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511313319] [2023-02-16 01:20:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:20:37,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:20:37,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:20:37,365 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) [2023-02-16 01:20:37,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:20:42,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-02-16 01:20:42,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:20:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-16 01:20:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:20:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 650 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 01:20:42,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:20:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 650 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 01:20:44,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511313319] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:20:44,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:20:44,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29] total 56 [2023-02-16 01:20:44,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305332911] [2023-02-16 01:20:44,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:20:44,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-16 01:20:44,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:20:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-16 01:20:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=2215, Unknown=0, NotChecked=0, Total=3080 [2023-02-16 01:20:44,076 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:20:59,514 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 182 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:21:16,760 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 175 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:21:36,073 WARN L233 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 168 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:21:52,750 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 161 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:22:09,037 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 154 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:24:31,493 WARN L233 SmtUtils]: Spent 18.42s on a formula simplification. DAG size of input: 185 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:24:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:31,511 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2023-02-16 01:24:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-16 01:24:31,511 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-02-16 01:24:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:31,512 INFO L225 Difference]: With dead ends: 148 [2023-02-16 01:24:31,512 INFO L226 Difference]: Without dead ends: 127 [2023-02-16 01:24:31,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 228.4s TimeCoverageRelationStatistics Valid=2320, Invalid=4321, Unknown=1, NotChecked=0, Total=6642 [2023-02-16 01:24:31,514 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:31,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 77 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 01:24:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-16 01:24:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-16 01:24:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0476190476190477) internal successors, (132), 126 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2023-02-16 01:24:31,526 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 72 [2023-02-16 01:24:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:31,526 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2023-02-16 01:24:31,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2023-02-16 01:24:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-16 01:24:31,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:31,527 INFO L195 NwaCegarLoop]: trace histogram [60, 52, 8, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:31,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:31,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:31,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:31,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1083190731, now seen corresponding path program 6 times [2023-02-16 01:24:31,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:31,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492056326] [2023-02-16 01:24:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:31,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 795 proven. 2756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 01:24:33,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:33,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492056326] [2023-02-16 01:24:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492056326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868280885] [2023-02-16 01:24:33,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:24:33,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:33,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:24:33,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:24:38,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2023-02-16 01:24:38,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 01:24:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 850 proven. 300 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2023-02-16 01:24:38,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 884 proven. 64 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2023-02-16 01:24:40,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868280885] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:40,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:40,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 13, 14] total 76 [2023-02-16 01:24:40,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742134263] [2023-02-16 01:24:40,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:40,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-16 01:24:40,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-16 01:24:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1210, Invalid=4490, Unknown=0, NotChecked=0, Total=5700 [2023-02-16 01:24:40,741 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)