./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml', '-i', '../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(G ! call(reach_error())) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', '83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-06 23:06:20,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 23:06:20,527 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-06 23:06:20,532 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 23:06:20,532 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 23:06:20,553 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 23:06:20,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 23:06:20,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 23:06:20,557 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 23:06:20,557 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 23:06:20,558 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 23:06:20,558 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 23:06:20,558 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 23:06:20,559 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 23:06:20,559 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 23:06:20,559 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 23:06:20,559 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 23:06:20,559 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 23:06:20,559 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-06 23:06:20,559 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 23:06:20,560 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 23:06:20,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 23:06:20,561 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 23:06:20,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 23:06:20,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 23:06:20,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 23:06:20,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 23:06:20,562 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 [2024-11-06 23:06:20,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 23:06:20,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 23:06:20,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 23:06:20,835 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 23:06:20,835 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 23:06:20,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2024-11-06 23:06:22,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 23:06:22,323 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 23:06:22,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2024-11-06 23:06:22,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/86ea09db3/9e9fb23bb6d74909b0db6de977cb00ee/FLAGe47b92ece [2024-11-06 23:06:22,651 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/86ea09db3/9e9fb23bb6d74909b0db6de977cb00ee [2024-11-06 23:06:22,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 23:06:22,654 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-06 23:06:22,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 23:06:22,655 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 23:06:22,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 23:06:22,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ca0284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22, skipping insertion in model container [2024-11-06 23:06:22,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,673 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 23:06:22,789 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2024-11-06 23:06:22,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 23:06:22,819 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 23:06:22,829 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2024-11-06 23:06:22,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 23:06:22,848 INFO L204 MainTranslator]: Completed translation [2024-11-06 23:06:22,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22 WrapperNode [2024-11-06 23:06:22,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 23:06:22,851 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 23:06:22,851 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 23:06:22,851 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 23:06:22,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,862 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,877 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-11-06 23:06:22,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 23:06:22,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 23:06:22,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 23:06:22,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 23:06:22,885 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,890 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,899 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-06 23:06:22,903 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,903 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,915 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,917 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 23:06:22,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 23:06:22,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 23:06:22,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 23:06:22,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (1/1) ... [2024-11-06 23:06:22,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 23:06:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:22,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-06 23:06:22,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-06 23:06:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 23:06:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-06 23:06:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-06 23:06:22,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 23:06:22,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 23:06:22,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-06 23:06:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-06 23:06:23,038 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 23:06:23,039 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 23:06:23,158 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-06 23:06:23,158 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 23:06:23,165 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 23:06:23,166 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-06 23:06:23,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:23 BoogieIcfgContainer [2024-11-06 23:06:23,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 23:06:23,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 23:06:23,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 23:06:23,172 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 23:06:23,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:06:22" (1/3) ... [2024-11-06 23:06:23,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111fffed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:23, skipping insertion in model container [2024-11-06 23:06:23,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:22" (2/3) ... [2024-11-06 23:06:23,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111fffed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:23, skipping insertion in model container [2024-11-06 23:06:23,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:23" (3/3) ... [2024-11-06 23:06:23,177 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.c [2024-11-06 23:06:23,190 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 23:06:23,192 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 23:06:23,245 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 23:06:23,256 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@6c25eaf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 23:06:23,258 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 23:06:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-06 23:06:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-06 23:06:23,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:23,269 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:23,270 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:23,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:23,274 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2024-11-06 23:06:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:23,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674149852] [2024-11-06 23:06:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:23,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:06:23,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674149852] [2024-11-06 23:06:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674149852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:06:23,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:06:23,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-06 23:06:23,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570355160] [2024-11-06 23:06:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:06:23,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-06 23:06:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-06 23:06:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 23:06:23,409 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-06 23:06:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:23,423 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2024-11-06 23:06:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-06 23:06:23,425 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-06 23:06:23,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:23,430 INFO L225 Difference]: With dead ends: 50 [2024-11-06 23:06:23,430 INFO L226 Difference]: Without dead ends: 22 [2024-11-06 23:06:23,435 INFO L431 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 [2024-11-06 23:06:23,437 INFO L432 NwaCegarLoop]: 36 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, 36 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 [2024-11-06 23:06:23,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 23:06:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-06 23:06:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-06 23:06:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 23:06:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2024-11-06 23:06:23,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2024-11-06 23:06:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:23,471 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2024-11-06 23:06:23,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-06 23:06:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2024-11-06 23:06:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-06 23:06:23,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:23,473 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:23,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-06 23:06:23,473 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:23,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2024-11-06 23:06:23,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:23,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209416584] [2024-11-06 23:06:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:23,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:06:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209416584] [2024-11-06 23:06:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209416584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:06:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:06:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 23:06:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065508527] [2024-11-06 23:06:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:06:23,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 23:06:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:23,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 23:06:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-06 23:06:23,662 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-06 23:06:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:23,715 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-11-06 23:06:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 23:06:23,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-06 23:06:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:23,717 INFO L225 Difference]: With dead ends: 36 [2024-11-06 23:06:23,717 INFO L226 Difference]: Without dead ends: 34 [2024-11-06 23:06:23,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-06 23:06:23,718 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:23,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 23:06:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-06 23:06:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2024-11-06 23:06:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 23:06:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-11-06 23:06:23,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2024-11-06 23:06:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:23,729 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-11-06 23:06:23,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-06 23:06:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-11-06 23:06:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-06 23:06:23,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:23,730 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:23,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-06 23:06:23,730 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:23,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2024-11-06 23:06:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:23,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184600893] [2024-11-06 23:06:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:23,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:06:23,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:23,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184600893] [2024-11-06 23:06:23,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184600893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:06:23,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:06:23,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-06 23:06:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518592033] [2024-11-06 23:06:23,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:06:23,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 23:06:23,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:23,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 23:06:23,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 23:06:23,805 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-06 23:06:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:23,823 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-11-06 23:06:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 23:06:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-06 23:06:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:23,825 INFO L225 Difference]: With dead ends: 42 [2024-11-06 23:06:23,825 INFO L226 Difference]: Without dead ends: 28 [2024-11-06 23:06:23,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 23:06:23,826 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:23,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 23:06:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-06 23:06:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-06 23:06:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 23:06:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-06 23:06:23,832 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2024-11-06 23:06:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:23,832 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-06 23:06:23,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-06 23:06:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-06 23:06:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-06 23:06:23,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:23,833 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:23,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-06 23:06:23,833 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:23,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2024-11-06 23:06:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:23,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378521524] [2024-11-06 23:06:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:23,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:23,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-06 23:06:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:06:23,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:23,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378521524] [2024-11-06 23:06:23,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378521524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:06:23,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:06:23,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 23:06:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516482138] [2024-11-06 23:06:23,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:06:23,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 23:06:23,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 23:06:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-06 23:06:23,934 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 23:06:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:23,997 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-11-06 23:06:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 23:06:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-06 23:06:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:23,998 INFO L225 Difference]: With dead ends: 42 [2024-11-06 23:06:23,998 INFO L226 Difference]: Without dead ends: 40 [2024-11-06 23:06:23,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-06 23:06:23,999 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:24,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 23:06:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-06 23:06:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-11-06 23:06:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 23:06:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-11-06 23:06:24,009 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2024-11-06 23:06:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:24,009 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-11-06 23:06:24,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 23:06:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-11-06 23:06:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-06 23:06:24,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:24,011 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:24,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-06 23:06:24,011 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:24,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2024-11-06 23:06:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:24,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370849767] [2024-11-06 23:06:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:24,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:06:24,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246502695] [2024-11-06 23:06:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:24,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:24,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:24,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:24,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-06 23:06:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:24,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-06 23:06:24,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 23:06:24,218 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 23:06:24,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:24,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370849767] [2024-11-06 23:06:24,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:06:24,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246502695] [2024-11-06 23:06:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246502695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:06:24,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:06:24,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 23:06:24,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458487215] [2024-11-06 23:06:24,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:06:24,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 23:06:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 23:06:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-06 23:06:24,222 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 23:06:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:24,295 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2024-11-06 23:06:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 23:06:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-06 23:06:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:24,296 INFO L225 Difference]: With dead ends: 61 [2024-11-06 23:06:24,296 INFO L226 Difference]: Without dead ends: 46 [2024-11-06 23:06:24,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-06 23:06:24,297 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:24,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:06:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-06 23:06:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-06 23:06:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-06 23:06:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2024-11-06 23:06:24,312 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2024-11-06 23:06:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:24,312 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2024-11-06 23:06:24,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 23:06:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2024-11-06 23:06:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-06 23:06:24,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:24,316 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:24,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-06 23:06:24,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:24,517 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:24,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2024-11-06 23:06:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:24,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547583906] [2024-11-06 23:06:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:06:24,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930798118] [2024-11-06 23:06:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:24,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:24,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:24,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-06 23:06:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:24,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-06 23:06:24,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-06 23:06:24,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-06 23:06:24,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547583906] [2024-11-06 23:06:24,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:06:24,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930798118] [2024-11-06 23:06:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930798118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:06:24,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 23:06:24,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-06 23:06:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786221931] [2024-11-06 23:06:24,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 23:06:24,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 23:06:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 23:06:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-06 23:06:24,933 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 23:06:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:25,062 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-11-06 23:06:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-06 23:06:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-11-06 23:06:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:25,065 INFO L225 Difference]: With dead ends: 60 [2024-11-06 23:06:25,067 INFO L226 Difference]: Without dead ends: 57 [2024-11-06 23:06:25,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-06 23:06:25,068 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:25,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 122 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:06:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-06 23:06:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-06 23:06:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-06 23:06:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2024-11-06 23:06:25,085 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 26 [2024-11-06 23:06:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:25,086 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2024-11-06 23:06:25,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 23:06:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2024-11-06 23:06:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-06 23:06:25,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:25,088 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:25,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-06 23:06:25,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:25,289 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:25,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2024-11-06 23:06:25,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:25,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449697852] [2024-11-06 23:06:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:25,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-06 23:06:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:25,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-06 23:06:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:25,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:06:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:25,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-06 23:06:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-06 23:06:25,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:25,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449697852] [2024-11-06 23:06:25,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449697852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:06:25,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819506831] [2024-11-06 23:06:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:25,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:25,417 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:25,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-06 23:06:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:25,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-06 23:06:25,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-06 23:06:25,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-06 23:06:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819506831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:06:25,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 23:06:25,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-06 23:06:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275645704] [2024-11-06 23:06:25,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 23:06:25,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 23:06:25,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 23:06:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-06 23:06:25,587 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-06 23:06:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:25,756 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2024-11-06 23:06:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 23:06:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 33 [2024-11-06 23:06:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:25,759 INFO L225 Difference]: With dead ends: 155 [2024-11-06 23:06:25,759 INFO L226 Difference]: Without dead ends: 130 [2024-11-06 23:06:25,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-06 23:06:25,761 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:25,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 170 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:06:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-06 23:06:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2024-11-06 23:06:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-06 23:06:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2024-11-06 23:06:25,784 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 33 [2024-11-06 23:06:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:25,784 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2024-11-06 23:06:25,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-06 23:06:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2024-11-06 23:06:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-06 23:06:25,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:25,786 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:25,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-06 23:06:25,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:25,987 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:25,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2024-11-06 23:06:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:25,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093376625] [2024-11-06 23:06:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:06:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765525247] [2024-11-06 23:06:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:25,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:26,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:26,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-06 23:06:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:26,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-06 23:06:26,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-06 23:06:26,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-06 23:06:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093376625] [2024-11-06 23:06:26,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:06:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765525247] [2024-11-06 23:06:26,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765525247] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-06 23:06:26,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:06:26,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-06 23:06:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844465893] [2024-11-06 23:06:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:06:26,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 23:06:26,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 23:06:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-06 23:06:26,261 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 23:06:27,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 23:06:27,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:27,754 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2024-11-06 23:06:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 23:06:27,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-06 23:06:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:27,757 INFO L225 Difference]: With dead ends: 146 [2024-11-06 23:06:27,758 INFO L226 Difference]: Without dead ends: 140 [2024-11-06 23:06:27,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-06 23:06:27,759 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:27,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-06 23:06:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-06 23:06:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2024-11-06 23:06:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 90 states have internal predecessors, (101), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-06 23:06:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2024-11-06 23:06:27,792 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 36 [2024-11-06 23:06:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:27,793 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2024-11-06 23:06:27,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 23:06:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2024-11-06 23:06:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-06 23:06:27,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:27,795 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:27,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-06 23:06:27,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-06 23:06:28,000 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:28,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:28,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1776130969, now seen corresponding path program 1 times [2024-11-06 23:06:28,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:28,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295092126] [2024-11-06 23:06:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:28,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-06 23:06:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-06 23:06:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:06:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-06 23:06:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-06 23:06:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-06 23:06:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-06 23:06:28,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295092126] [2024-11-06 23:06:28,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295092126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:06:28,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:06:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 23:06:28,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354170186] [2024-11-06 23:06:28,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:06:28,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 23:06:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 23:06:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-06 23:06:28,119 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-06 23:06:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:28,168 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2024-11-06 23:06:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 23:06:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-11-06 23:06:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:28,170 INFO L225 Difference]: With dead ends: 137 [2024-11-06 23:06:28,171 INFO L226 Difference]: Without dead ends: 118 [2024-11-06 23:06:28,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-06 23:06:28,172 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:28,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 23:06:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-06 23:06:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-06 23:06:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-06 23:06:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2024-11-06 23:06:28,195 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 42 [2024-11-06 23:06:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:28,196 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2024-11-06 23:06:28,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-06 23:06:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2024-11-06 23:06:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-06 23:06:28,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:28,199 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:28,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-06 23:06:28,199 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:28,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2024-11-06 23:06:28,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:28,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669190424] [2024-11-06 23:06:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:28,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-06 23:06:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-06 23:06:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:06:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-06 23:06:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-06 23:06:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-06 23:06:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-06 23:06:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-06 23:06:28,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669190424] [2024-11-06 23:06:28,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669190424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:06:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898814532] [2024-11-06 23:06:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:28,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:28,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:28,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-06 23:06:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:28,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 23:06:28,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-06 23:06:28,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-06 23:06:28,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898814532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:06:28,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 23:06:28,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-06 23:06:28,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220719722] [2024-11-06 23:06:28,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 23:06:28,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-06 23:06:28,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:28,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-06 23:06:28,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-06 23:06:28,541 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-06 23:06:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:28,723 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2024-11-06 23:06:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-06 23:06:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 49 [2024-11-06 23:06:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:28,725 INFO L225 Difference]: With dead ends: 241 [2024-11-06 23:06:28,727 INFO L226 Difference]: Without dead ends: 220 [2024-11-06 23:06:28,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-11-06 23:06:28,728 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:28,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 190 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:06:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-06 23:06:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2024-11-06 23:06:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 147 states have internal predecessors, (165), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-06 23:06:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2024-11-06 23:06:28,759 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 49 [2024-11-06 23:06:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:28,759 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2024-11-06 23:06:28,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-06 23:06:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2024-11-06 23:06:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-06 23:06:28,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:28,762 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:28,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-06 23:06:28,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-06 23:06:28,967 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:28,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:28,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2024-11-06 23:06:28,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:28,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012505837] [2024-11-06 23:06:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:06:28,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153714315] [2024-11-06 23:06:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:28,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:28,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:29,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:29,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-06 23:06:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:29,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-06 23:06:29,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-06 23:06:29,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-06 23:06:30,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012505837] [2024-11-06 23:06:30,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:06:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153714315] [2024-11-06 23:06:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153714315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:06:30,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 23:06:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-06 23:06:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636723886] [2024-11-06 23:06:30,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 23:06:30,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-06 23:06:30,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-06 23:06:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-06 23:06:30,717 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-06 23:06:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:31,411 INFO L93 Difference]: Finished difference Result 359 states and 460 transitions. [2024-11-06 23:06:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-06 23:06:31,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2024-11-06 23:06:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:31,414 INFO L225 Difference]: With dead ends: 359 [2024-11-06 23:06:31,414 INFO L226 Difference]: Without dead ends: 298 [2024-11-06 23:06:31,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-06 23:06:31,416 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 53 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:31,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 274 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-06 23:06:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-06 23:06:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 272. [2024-11-06 23:06:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 185 states have (on average 1.227027027027027) internal successors, (227), 192 states have internal predecessors, (227), 57 states have call successors, (57), 29 states have call predecessors, (57), 29 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-06 23:06:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 339 transitions. [2024-11-06 23:06:31,472 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 339 transitions. Word has length 58 [2024-11-06 23:06:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:31,472 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 339 transitions. [2024-11-06 23:06:31,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-06 23:06:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 339 transitions. [2024-11-06 23:06:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-06 23:06:31,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:31,473 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:31,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-06 23:06:31,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-06 23:06:31,678 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:31,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2024-11-06 23:06:31,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:31,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345902007] [2024-11-06 23:06:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:06:31,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231914470] [2024-11-06 23:06:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:31,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:31,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:31,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:31,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-06 23:06:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:31,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-06 23:06:31,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-06 23:06:32,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-06 23:06:32,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:32,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345902007] [2024-11-06 23:06:32,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:06:32,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231914470] [2024-11-06 23:06:32,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231914470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:06:32,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 23:06:32,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-06 23:06:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127984251] [2024-11-06 23:06:32,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 23:06:32,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-06 23:06:32,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-06 23:06:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-06 23:06:32,549 INFO L87 Difference]: Start difference. First operand 272 states and 339 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-06 23:06:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:33,541 INFO L93 Difference]: Finished difference Result 337 states and 420 transitions. [2024-11-06 23:06:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-06 23:06:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2024-11-06 23:06:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:33,543 INFO L225 Difference]: With dead ends: 337 [2024-11-06 23:06:33,543 INFO L226 Difference]: Without dead ends: 269 [2024-11-06 23:06:33,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-06 23:06:33,544 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:33,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 253 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-06 23:06:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-06 23:06:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 243. [2024-11-06 23:06:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 166 states have (on average 1.180722891566265) internal successors, (196), 171 states have internal predecessors, (196), 47 states have call successors, (47), 30 states have call predecessors, (47), 29 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-06 23:06:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 288 transitions. [2024-11-06 23:06:33,591 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 288 transitions. Word has length 69 [2024-11-06 23:06:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:33,591 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 288 transitions. [2024-11-06 23:06:33,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-06 23:06:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 288 transitions. [2024-11-06 23:06:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-06 23:06:33,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:33,593 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:06:33,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-06 23:06:33,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:33,796 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:33,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:33,797 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2024-11-06 23:06:33,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:33,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159401856] [2024-11-06 23:06:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-06 23:06:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-06 23:06:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:06:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-06 23:06:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-06 23:06:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-06 23:06:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-06 23:06:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-06 23:06:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-06 23:06:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-06 23:06:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-06 23:06:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-06 23:06:34,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159401856] [2024-11-06 23:06:34,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159401856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:06:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381725470] [2024-11-06 23:06:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:34,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:34,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:34,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:34,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-06 23:06:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:06:34,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-06 23:06:34,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-06 23:06:34,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-06 23:06:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381725470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:06:34,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 23:06:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-06 23:06:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142522145] [2024-11-06 23:06:34,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 23:06:34,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-06 23:06:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-06 23:06:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-06 23:06:34,801 INFO L87 Difference]: Start difference. First operand 243 states and 288 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-06 23:06:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:06:35,034 INFO L93 Difference]: Finished difference Result 281 states and 329 transitions. [2024-11-06 23:06:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-06 23:06:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 74 [2024-11-06 23:06:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:06:35,037 INFO L225 Difference]: With dead ends: 281 [2024-11-06 23:06:35,037 INFO L226 Difference]: Without dead ends: 215 [2024-11-06 23:06:35,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-06 23:06:35,038 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:06:35,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 249 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:06:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-06 23:06:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2024-11-06 23:06:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-06 23:06:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2024-11-06 23:06:35,082 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 74 [2024-11-06 23:06:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:06:35,082 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2024-11-06 23:06:35,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-06 23:06:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2024-11-06 23:06:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-06 23:06:35,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:06:35,083 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-06 23:06:35,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-06 23:06:35,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:35,285 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:06:35,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:06:35,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2024-11-06 23:06:35,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:06:35,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866379351] [2024-11-06 23:06:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:06:35,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:06:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:06:35,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658130870] [2024-11-06 23:06:35,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 23:06:35,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:06:35,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:06:35,322 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:06:35,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-06 23:06:35,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 23:06:35,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 23:06:35,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-06 23:06:35,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:06:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-06 23:06:35,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:06:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-06 23:06:52,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:06:52,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866379351] [2024-11-06 23:06:52,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:06:52,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658130870] [2024-11-06 23:06:52,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658130870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:06:52,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 23:06:52,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-06 23:06:52,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013926969] [2024-11-06 23:06:52,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 23:06:52,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-06 23:06:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:06:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-06 23:06:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-06 23:06:52,435 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-06 23:07:05,277 WARN L286 SmtUtils]: Spent 9.61s on a formula simplification. DAG size of input: 223 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-06 23:07:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:07:06,037 INFO L93 Difference]: Finished difference Result 319 states and 404 transitions. [2024-11-06 23:07:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-06 23:07:06,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 90 [2024-11-06 23:07:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:07:06,039 INFO L225 Difference]: With dead ends: 319 [2024-11-06 23:07:06,039 INFO L226 Difference]: Without dead ends: 283 [2024-11-06 23:07:06,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2024-11-06 23:07:06,041 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 74 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-06 23:07:06,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 587 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-06 23:07:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-06 23:07:06,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 245. [2024-11-06 23:07:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 167 states have (on average 1.1736526946107784) internal successors, (196), 171 states have internal predecessors, (196), 49 states have call successors, (49), 28 states have call predecessors, (49), 28 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-06 23:07:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 293 transitions. [2024-11-06 23:07:06,105 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 293 transitions. Word has length 90 [2024-11-06 23:07:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:07:06,105 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 293 transitions. [2024-11-06 23:07:06,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-06 23:07:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 293 transitions. [2024-11-06 23:07:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-06 23:07:06,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:07:06,107 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-06 23:07:06,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-06 23:07:06,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:07:06,311 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:07:06,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:07:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1147408146, now seen corresponding path program 3 times [2024-11-06 23:07:06,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:07:06,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668215863] [2024-11-06 23:07:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:07:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:07:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:07:06,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759298896] [2024-11-06 23:07:06,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-06 23:07:06,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:07:06,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:07:06,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:07:06,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-06 23:07:06,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-06 23:07:06,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 23:07:06,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-06 23:07:06,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:07:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 81 proven. 41 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-06 23:07:06,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:07:07,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:07:07,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668215863] [2024-11-06 23:07:07,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:07:07,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759298896] [2024-11-06 23:07:07,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759298896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:07:07,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:07:07,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-06 23:07:07,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558967489] [2024-11-06 23:07:07,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 23:07:07,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 23:07:07,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:07:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 23:07:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-06 23:07:07,362 INFO L87 Difference]: Start difference. First operand 245 states and 293 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-06 23:07:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:07:07,502 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2024-11-06 23:07:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 23:07:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 95 [2024-11-06 23:07:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:07:07,504 INFO L225 Difference]: With dead ends: 268 [2024-11-06 23:07:07,504 INFO L226 Difference]: Without dead ends: 266 [2024-11-06 23:07:07,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-06 23:07:07,505 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:07:07,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 111 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:07:07,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-06 23:07:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 261. [2024-11-06 23:07:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 183 states have internal predecessors, (208), 49 states have call successors, (49), 32 states have call predecessors, (49), 32 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-06 23:07:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 305 transitions. [2024-11-06 23:07:07,557 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 305 transitions. Word has length 95 [2024-11-06 23:07:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:07:07,558 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 305 transitions. [2024-11-06 23:07:07,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-06 23:07:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 305 transitions. [2024-11-06 23:07:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-06 23:07:07,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:07:07,559 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:07:07,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-06 23:07:07,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-06 23:07:07,762 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:07:07,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:07:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2024-11-06 23:07:07,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:07:07,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137401085] [2024-11-06 23:07:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:07:07,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:07:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-06 23:07:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-06 23:07:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:07:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-06 23:07:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-06 23:07:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-06 23:07:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-06 23:07:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-06 23:07:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-06 23:07:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-11-06 23:07:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-11-06 23:07:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-11-06 23:07:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-06 23:07:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-06 23:07:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-06 23:07:07,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:07:07,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137401085] [2024-11-06 23:07:07,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137401085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:07:07,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287467594] [2024-11-06 23:07:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:07:07,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:07:07,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:07:07,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:07:07,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-06 23:07:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:08,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-06 23:07:08,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:07:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-06 23:07:08,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:07:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-06 23:07:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287467594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:07:08,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 23:07:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-06 23:07:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142631478] [2024-11-06 23:07:08,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 23:07:08,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-06 23:07:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:07:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-06 23:07:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-11-06 23:07:08,262 INFO L87 Difference]: Start difference. First operand 261 states and 305 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-06 23:07:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:07:08,654 INFO L93 Difference]: Finished difference Result 720 states and 884 transitions. [2024-11-06 23:07:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-06 23:07:08,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 96 [2024-11-06 23:07:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:07:08,658 INFO L225 Difference]: With dead ends: 720 [2024-11-06 23:07:08,660 INFO L226 Difference]: Without dead ends: 650 [2024-11-06 23:07:08,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-11-06 23:07:08,662 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 23:07:08,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 213 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 23:07:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2024-11-06 23:07:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 562. [2024-11-06 23:07:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 376 states have (on average 1.2074468085106382) internal successors, (454), 394 states have internal predecessors, (454), 116 states have call successors, (116), 69 states have call predecessors, (116), 69 states have return successors, (112), 98 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-06 23:07:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 682 transitions. [2024-11-06 23:07:08,791 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 682 transitions. Word has length 96 [2024-11-06 23:07:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:07:08,791 INFO L471 AbstractCegarLoop]: Abstraction has 562 states and 682 transitions. [2024-11-06 23:07:08,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-06 23:07:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 682 transitions. [2024-11-06 23:07:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-06 23:07:08,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:07:08,792 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:07:08,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-06 23:07:08,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-06 23:07:08,993 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:07:08,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:07:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2024-11-06 23:07:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:07:08,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954166444] [2024-11-06 23:07:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:07:08,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:07:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:07:09,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351008055] [2024-11-06 23:07:09,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 23:07:09,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:07:09,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:07:09,020 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:07:09,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-06 23:07:09,094 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 23:07:09,095 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 23:07:09,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-06 23:07:09,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:07:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-06 23:07:09,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:07:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-06 23:07:11,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:07:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954166444] [2024-11-06 23:07:11,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:07:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351008055] [2024-11-06 23:07:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351008055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:07:11,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 23:07:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-11-06 23:07:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992342157] [2024-11-06 23:07:11,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 23:07:11,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-06 23:07:11,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:07:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-06 23:07:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-11-06 23:07:11,585 INFO L87 Difference]: Start difference. First operand 562 states and 682 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-06 23:07:17,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 23:07:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:07:17,256 INFO L93 Difference]: Finished difference Result 732 states and 907 transitions. [2024-11-06 23:07:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-06 23:07:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 101 [2024-11-06 23:07:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:07:17,260 INFO L225 Difference]: With dead ends: 732 [2024-11-06 23:07:17,260 INFO L226 Difference]: Without dead ends: 555 [2024-11-06 23:07:17,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2024-11-06 23:07:17,261 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 85 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:07:17,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 411 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-06 23:07:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-11-06 23:07:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 490. [2024-11-06 23:07:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 328 states have (on average 1.1829268292682926) internal successors, (388), 341 states have internal predecessors, (388), 98 states have call successors, (98), 64 states have call predecessors, (98), 63 states have return successors, (94), 84 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-06 23:07:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 580 transitions. [2024-11-06 23:07:17,405 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 580 transitions. Word has length 101 [2024-11-06 23:07:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:07:17,405 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 580 transitions. [2024-11-06 23:07:17,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-06 23:07:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 580 transitions. [2024-11-06 23:07:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-06 23:07:17,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:07:17,407 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:07:17,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-06 23:07:17,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-06 23:07:17,610 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:07:17,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:07:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 2 times [2024-11-06 23:07:17,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:07:17,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190875385] [2024-11-06 23:07:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:07:17,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:07:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-06 23:07:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-06 23:07:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:07:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-06 23:07:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-06 23:07:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-06 23:07:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-06 23:07:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-06 23:07:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-06 23:07:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-11-06 23:07:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-11-06 23:07:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-06 23:07:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-11-06 23:07:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-11-06 23:07:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-06 23:07:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-06 23:07:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:07:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-06 23:07:17,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:07:17,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190875385] [2024-11-06 23:07:17,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190875385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:07:17,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729733077] [2024-11-06 23:07:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 23:07:17,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:07:17,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:07:17,966 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:07:17,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-06 23:07:18,029 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 23:07:18,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 23:07:18,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-06 23:07:18,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:07:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-06 23:07:18,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:07:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-06 23:07:19,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729733077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 23:07:19,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 23:07:19,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 10] total 24 [2024-11-06 23:07:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867560229] [2024-11-06 23:07:19,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 23:07:19,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-06 23:07:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:07:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-06 23:07:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-11-06 23:07:19,254 INFO L87 Difference]: Start difference. First operand 490 states and 580 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-11-06 23:07:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:07:19,808 INFO L93 Difference]: Finished difference Result 562 states and 691 transitions. [2024-11-06 23:07:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-06 23:07:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) Word has length 106 [2024-11-06 23:07:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:07:19,813 INFO L225 Difference]: With dead ends: 562 [2024-11-06 23:07:19,813 INFO L226 Difference]: Without dead ends: 493 [2024-11-06 23:07:19,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2024-11-06 23:07:19,814 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 23 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 23:07:19,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 321 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 23:07:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-11-06 23:07:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 440. [2024-11-06 23:07:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 310 states have internal predecessors, (342), 93 states have call successors, (93), 56 states have call predecessors, (93), 56 states have return successors, (87), 73 states have call predecessors, (87), 87 states have call successors, (87) [2024-11-06 23:07:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 522 transitions. [2024-11-06 23:07:19,959 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 522 transitions. Word has length 106 [2024-11-06 23:07:19,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:07:19,959 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 522 transitions. [2024-11-06 23:07:19,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-11-06 23:07:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 522 transitions. [2024-11-06 23:07:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-06 23:07:19,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:07:19,960 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-06 23:07:19,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-06 23:07:20,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-06 23:07:20,166 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:07:20,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:07:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash 969385619, now seen corresponding path program 4 times [2024-11-06 23:07:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:07:20,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584755067] [2024-11-06 23:07:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:07:20,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:07:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:07:20,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310284235] [2024-11-06 23:07:20,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-06 23:07:20,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:07:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:07:20,203 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:07:20,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-06 23:07:20,288 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-06 23:07:20,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 23:07:20,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-06 23:07:20,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:07:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 159 proven. 86 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-11-06 23:07:36,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:07:52,505 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)