./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i --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/divbin2_unwindbound5.i', '-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', 'e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2'] 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/divbin2_unwindbound5.i -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 e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-06 22:51:55,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 22:51:55,120 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-06 22:51:55,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 22:51:55,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 22:51:55,145 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 22:51:55,146 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 22:51:55,146 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 22:51:55,146 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 22:51:55,147 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 22:51:55,147 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 22:51:55,148 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 22:51:55,148 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 22:51:55,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 22:51:55,148 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 22:51:55,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 22:51:55,148 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 22:51:55,149 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 22:51:55,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 22:51:55,149 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 22:51:55,150 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 22:51:55,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 22:51:55,150 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 -> e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 [2024-11-06 22:51:55,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 22:51:55,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 22:51:55,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 22:51:55,366 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 22:51:55,367 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 22:51:55,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2024-11-06 22:51:56,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 22:51:56,606 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 22:51:56,606 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2024-11-06 22:51:56,611 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/641702977/13f4998d33184e249a672202be5f2c29/FLAG35f00c88f [2024-11-06 22:51:56,619 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/641702977/13f4998d33184e249a672202be5f2c29 [2024-11-06 22:51:56,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 22:51:56,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-06 22:51:56,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 22:51:56,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 22:51:56,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 22:51:56,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7546f3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56, skipping insertion in model container [2024-11-06 22:51:56,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 22:51:56,720 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/divbin2_unwindbound5.i[951,964] [2024-11-06 22:51:56,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 22:51:56,734 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 22:51:56,741 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/divbin2_unwindbound5.i[951,964] [2024-11-06 22:51:56,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 22:51:56,754 INFO L204 MainTranslator]: Completed translation [2024-11-06 22:51:56,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56 WrapperNode [2024-11-06 22:51:56,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 22:51:56,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 22:51:56,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 22:51:56,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 22:51:56,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,777 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2024-11-06 22:51:56,777 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 22:51:56,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 22:51:56,778 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 22:51:56,778 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 22:51:56,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,787 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,794 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-06 22:51:56,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,796 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,804 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 22:51:56,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 22:51:56,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 22:51:56,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 22:51:56,805 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (1/1) ... [2024-11-06 22:51:56,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 22:51:56,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:51:56,827 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 22:51:56,832 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 22:51:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 22:51:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-06 22:51:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 22:51:56,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 22:51:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-06 22:51:56,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-06 22:51:56,895 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 22:51:56,896 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 22:51:57,002 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-06 22:51:57,003 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 22:51:57,009 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 22:51:57,011 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-06 22:51:57,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:57 BoogieIcfgContainer [2024-11-06 22:51:57,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 22:51:57,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 22:51:57,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 22:51:57,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 22:51:57,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:56" (1/3) ... [2024-11-06 22:51:57,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3867485e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:57, skipping insertion in model container [2024-11-06 22:51:57,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:56" (2/3) ... [2024-11-06 22:51:57,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3867485e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:57, skipping insertion in model container [2024-11-06 22:51:57,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:57" (3/3) ... [2024-11-06 22:51:57,019 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2024-11-06 22:51:57,029 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 22:51:57,029 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 22:51:57,067 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 22:51:57,075 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;@44753576, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 22:51:57,075 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 22:51:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:51:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-06 22:51:57,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:57,085 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:57,086 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:57,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2024-11-06 22:51:57,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:57,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079160880] [2024-11-06 22:51:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:57,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:57,192 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 22:51:57,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:57,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079160880] [2024-11-06 22:51:57,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079160880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:51:57,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:51:57,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-06 22:51:57,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519470085] [2024-11-06 22:51:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:51:57,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-06 22:51:57,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:57,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-06 22:51:57,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 22:51:57,212 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 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 22:51:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:51:57,222 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2024-11-06 22:51:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-06 22:51:57,223 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 22:51:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:51:57,226 INFO L225 Difference]: With dead ends: 37 [2024-11-06 22:51:57,226 INFO L226 Difference]: Without dead ends: 17 [2024-11-06 22:51:57,228 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 22:51:57,229 INFO L432 NwaCegarLoop]: 26 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, 26 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 22:51:57,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:51:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-06 22:51:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-06 22:51:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 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 22:51:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-11-06 22:51:57,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2024-11-06 22:51:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:51:57,251 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-11-06 22:51:57,251 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 22:51:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-11-06 22:51:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-06 22:51:57,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:57,252 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:57,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-06 22:51:57,255 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:57,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2024-11-06 22:51:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579386250] [2024-11-06 22:51:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:57,308 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 22:51:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579386250] [2024-11-06 22:51:57,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579386250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:51:57,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:51:57,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-06 22:51:57,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227675991] [2024-11-06 22:51:57,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:51:57,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 22:51:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 22:51:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 22:51:57,311 INFO L87 Difference]: Start difference. First operand 17 states and 22 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 22:51:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:51:57,323 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-11-06 22:51:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 22:51:57,324 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 22:51:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:51:57,325 INFO L225 Difference]: With dead ends: 31 [2024-11-06 22:51:57,325 INFO L226 Difference]: Without dead ends: 19 [2024-11-06 22:51:57,325 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 22:51:57,325 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 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 22:51:57,326 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:51:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-06 22:51:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-06 22:51:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 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 22:51:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2024-11-06 22:51:57,328 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2024-11-06 22:51:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:51:57,329 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2024-11-06 22:51:57,329 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 22:51:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2024-11-06 22:51:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-06 22:51:57,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:57,329 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:57,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-06 22:51:57,329 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:57,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:57,330 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2024-11-06 22:51:57,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:57,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974665263] [2024-11-06 22:51:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:57,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:57,433 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 22:51:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974665263] [2024-11-06 22:51:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974665263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:51:57,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:51:57,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-06 22:51:57,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753815420] [2024-11-06 22:51:57,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:51:57,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 22:51:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 22:51:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-06 22:51:57,435 INFO L87 Difference]: Start difference. First operand 19 states and 24 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, (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 22:51:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:51:57,460 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-06 22:51:57,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 22:51:57,463 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, (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 11 [2024-11-06 22:51:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:51:57,463 INFO L225 Difference]: With dead ends: 30 [2024-11-06 22:51:57,463 INFO L226 Difference]: Without dead ends: 23 [2024-11-06 22:51:57,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-06 22:51:57,464 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:51:57,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:51:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-06 22:51:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-11-06 22:51:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 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 22:51:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-11-06 22:51:57,469 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2024-11-06 22:51:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:51:57,469 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-11-06 22:51:57,469 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, (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 22:51:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-11-06 22:51:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-06 22:51:57,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:57,470 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:57,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-06 22:51:57,470 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:57,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:57,473 INFO L85 PathProgramCache]: Analyzing trace with hash 551065955, now seen corresponding path program 1 times [2024-11-06 22:51:57,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:57,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760798858] [2024-11-06 22:51:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:57,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 22:51:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826188506] [2024-11-06 22:51:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:57,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:51:57,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:51:57,499 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 22:51:57,501 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 22:51:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:57,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 22:51:57,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:51:57,630 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 22:51:57,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 22:51:57,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760798858] [2024-11-06 22:51:57,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 22:51:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826188506] [2024-11-06 22:51:57,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826188506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:51:57,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:51:57,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 22:51:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007539958] [2024-11-06 22:51:57,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:51:57,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 22:51:57,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 22:51:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-06 22:51:57,632 INFO L87 Difference]: Start difference. First operand 22 states and 28 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, (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 22:51:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:51:57,671 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-06 22:51:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 22:51:57,671 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, (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 11 [2024-11-06 22:51:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:51:57,672 INFO L225 Difference]: With dead ends: 34 [2024-11-06 22:51:57,672 INFO L226 Difference]: Without dead ends: 31 [2024-11-06 22:51:57,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 22:51:57,672 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:51:57,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:51:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-06 22:51:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2024-11-06 22:51:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:51:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-06 22:51:57,680 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2024-11-06 22:51:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:51:57,681 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-06 22:51:57,681 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, (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 22:51:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-06 22:51:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-06 22:51:57,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:57,682 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:57,695 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 22:51:57,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:51:57,883 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:57,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2116548854, now seen corresponding path program 1 times [2024-11-06 22:51:57,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:57,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453756633] [2024-11-06 22:51:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:57,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:57,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-06 22:51:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:51:57,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:57,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453756633] [2024-11-06 22:51:57,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453756633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:51:57,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306305055] [2024-11-06 22:51:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:57,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:51:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:51:57,992 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 22:51:57,993 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 22:51:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:58,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 22:51:58,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:51:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:51:58,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:51:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:51:58,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306305055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:51:58,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:51:58,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2024-11-06 22:51:58,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640383129] [2024-11-06 22:51:58,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:51:58,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 22:51:58,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 22:51:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-06 22:51:58,108 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-06 22:51:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:51:58,182 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2024-11-06 22:51:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-06 22:51:58,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-11-06 22:51:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:51:58,184 INFO L225 Difference]: With dead ends: 101 [2024-11-06 22:51:58,184 INFO L226 Difference]: Without dead ends: 94 [2024-11-06 22:51:58,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-06 22:51:58,186 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:51:58,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 117 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:51:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-06 22:51:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2024-11-06 22:51:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 69 states have internal predecessors, (87), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-06 22:51:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2024-11-06 22:51:58,199 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 20 [2024-11-06 22:51:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:51:58,199 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2024-11-06 22:51:58,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-06 22:51:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2024-11-06 22:51:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-06 22:51:58,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:58,201 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:58,213 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 22:51:58,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:51:58,402 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:58,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:58,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2118336314, now seen corresponding path program 1 times [2024-11-06 22:51:58,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:58,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046655063] [2024-11-06 22:51:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:58,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:58,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-06 22:51:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:51:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:58,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046655063] [2024-11-06 22:51:58,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046655063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:51:58,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:51:58,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-06 22:51:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128835312] [2024-11-06 22:51:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:51:58,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-06 22:51:58,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-06 22:51:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 22:51:58,534 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 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 22:51:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:51:58,556 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2024-11-06 22:51:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-06 22:51:58,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 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 20 [2024-11-06 22:51:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:51:58,560 INFO L225 Difference]: With dead ends: 135 [2024-11-06 22:51:58,561 INFO L226 Difference]: Without dead ends: 65 [2024-11-06 22:51:58,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 22:51:58,561 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:51:58,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:51:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-06 22:51:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-06 22:51:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 54 states have internal predecessors, (68), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-06 22:51:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2024-11-06 22:51:58,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 20 [2024-11-06 22:51:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:51:58,570 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2024-11-06 22:51:58,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 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 22:51:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2024-11-06 22:51:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-06 22:51:58,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:58,571 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:58,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-06 22:51:58,571 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:58,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash -441801227, now seen corresponding path program 1 times [2024-11-06 22:51:58,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:58,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468060680] [2024-11-06 22:51:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:58,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:58,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-06 22:51:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:51:58,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468060680] [2024-11-06 22:51:58,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468060680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:51:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585803023] [2024-11-06 22:51:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:58,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:51:58,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:51:58,614 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 22:51:58,616 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 22:51:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:58,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-06 22:51:58,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:51:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-06 22:51:58,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:51:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:51:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585803023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:51:58,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:51:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-06 22:51:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115420470] [2024-11-06 22:51:58,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:51:58,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-06 22:51:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-06 22:51:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-06 22:51:58,703 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:51:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:51:58,748 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2024-11-06 22:51:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 22:51:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-06 22:51:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:51:58,749 INFO L225 Difference]: With dead ends: 118 [2024-11-06 22:51:58,749 INFO L226 Difference]: Without dead ends: 67 [2024-11-06 22:51:58,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-06 22:51:58,750 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:51:58,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:51:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-06 22:51:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-06 22:51:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 56 states have internal predecessors, (68), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-06 22:51:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-11-06 22:51:58,755 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 22 [2024-11-06 22:51:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:51:58,755 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-11-06 22:51:58,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:51:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-11-06 22:51:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-06 22:51:58,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:51:58,757 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:51:58,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-06 22:51:58,957 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 22:51:58,958 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:51:58,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:51:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1149777120, now seen corresponding path program 1 times [2024-11-06 22:51:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:51:58,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864718948] [2024-11-06 22:51:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:51:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 22:51:58,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708919457] [2024-11-06 22:51:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:51:58,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:51:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:51:58,989 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 22:51:58,990 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 22:51:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:51:59,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-06 22:51:59,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:51:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:51:59,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:52:11,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:52:11,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864718948] [2024-11-06 22:52:11,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 22:52:11,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708919457] [2024-11-06 22:52:11,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708919457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:52:11,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 22:52:11,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-06 22:52:11,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743232359] [2024-11-06 22:52:11,650 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 22:52:11,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-06 22:52:11,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:52:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-06 22:52:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=185, Unknown=3, NotChecked=0, Total=240 [2024-11-06 22:52:11,652 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 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 22:52:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:52:11,762 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2024-11-06 22:52:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-06 22:52:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 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 23 [2024-11-06 22:52:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:52:11,763 INFO L225 Difference]: With dead ends: 85 [2024-11-06 22:52:11,765 INFO L226 Difference]: Without dead ends: 81 [2024-11-06 22:52:11,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=59, Invalid=210, Unknown=3, NotChecked=0, Total=272 [2024-11-06 22:52:11,765 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 22:52:11,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 22:52:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-06 22:52:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2024-11-06 22:52:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-06 22:52:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2024-11-06 22:52:11,779 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 23 [2024-11-06 22:52:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:52:11,779 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2024-11-06 22:52:11,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 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 22:52:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2024-11-06 22:52:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-06 22:52:11,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:52:11,782 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:52:11,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-06 22:52:11,982 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 22:52:11,982 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:52:11,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:52:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1814741975, now seen corresponding path program 1 times [2024-11-06 22:52:11,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:52:11,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413107914] [2024-11-06 22:52:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:52:11,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:52:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:12,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-06 22:52:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-06 22:52:12,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:52:12,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413107914] [2024-11-06 22:52:12,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413107914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:52:12,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385957401] [2024-11-06 22:52:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:52:12,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:52:12,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:52:12,097 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 22:52:12,098 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 22:52:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:12,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-06 22:52:12,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:52:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:52:12,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:52:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-06 22:52:12,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385957401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:52:12,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:52:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 8 [2024-11-06 22:52:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767100008] [2024-11-06 22:52:12,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:52:12,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-06 22:52:12,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:52:12,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-06 22:52:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-06 22:52:12,227 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:52:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:52:12,283 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2024-11-06 22:52:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-06 22:52:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-06 22:52:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:52:12,286 INFO L225 Difference]: With dead ends: 118 [2024-11-06 22:52:12,286 INFO L226 Difference]: Without dead ends: 84 [2024-11-06 22:52:12,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-06 22:52:12,286 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:52:12,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 80 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:52:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-06 22:52:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2024-11-06 22:52:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.2) internal successors, (78), 67 states have internal predecessors, (78), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-06 22:52:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-06 22:52:12,297 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 31 [2024-11-06 22:52:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:52:12,297 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-06 22:52:12,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:52:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-06 22:52:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-06 22:52:12,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:52:12,300 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-06 22:52:12,312 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 22:52:12,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:52:12,500 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:52:12,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:52:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash -815549923, now seen corresponding path program 2 times [2024-11-06 22:52:12,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:52:12,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977180090] [2024-11-06 22:52:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:52:12,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:52:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:12,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-06 22:52:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:12,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-06 22:52:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:52:12,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:52:12,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977180090] [2024-11-06 22:52:12,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977180090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:52:12,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222443066] [2024-11-06 22:52:12,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 22:52:12,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:52:12,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:52:12,831 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 22:52:12,832 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 22:52:12,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 22:52:12,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 22:52:12,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-06 22:52:12,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:52:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:52:12,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:52:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:52:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222443066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:52:13,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:52:13,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2024-11-06 22:52:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402130610] [2024-11-06 22:52:13,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:52:13,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-06 22:52:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:52:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-06 22:52:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-06 22:52:13,188 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 7 states have call successors, (7), 2 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 22:52:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:52:13,263 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2024-11-06 22:52:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-06 22:52:13,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-11-06 22:52:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:52:13,269 INFO L225 Difference]: With dead ends: 121 [2024-11-06 22:52:13,269 INFO L226 Difference]: Without dead ends: 65 [2024-11-06 22:52:13,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-06 22:52:13,270 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 22:52:13,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 163 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 22:52:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-06 22:52:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2024-11-06 22:52:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-06 22:52:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-11-06 22:52:13,275 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 32 [2024-11-06 22:52:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:52:13,275 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-11-06 22:52:13,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 7 states have call successors, (7), 2 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 22:52:13,275 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-11-06 22:52:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-06 22:52:13,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:52:13,276 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:52:13,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-06 22:52:13,476 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,SelfDestructingSolverStorable9 [2024-11-06 22:52:13,476 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:52:13,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:52:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash 81521713, now seen corresponding path program 2 times [2024-11-06 22:52:13,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:52:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800135074] [2024-11-06 22:52:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:52:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:52:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:13,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-06 22:52:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-06 22:52:13,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:52:13,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800135074] [2024-11-06 22:52:13,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800135074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:52:13,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:52:13,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 22:52:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446164691] [2024-11-06 22:52:13,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:52:13,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 22:52:13,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:52:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 22:52:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-06 22:52:13,540 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 22:52:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:52:13,561 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2024-11-06 22:52:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 22:52:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 34 [2024-11-06 22:52:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:52:13,563 INFO L225 Difference]: With dead ends: 89 [2024-11-06 22:52:13,563 INFO L226 Difference]: Without dead ends: 55 [2024-11-06 22:52:13,563 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 22:52:13,563 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:52:13,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:52:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-06 22:52:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2024-11-06 22:52:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:52:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-11-06 22:52:13,570 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2024-11-06 22:52:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:52:13,571 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-11-06 22:52:13,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 22:52:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-11-06 22:52:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-06 22:52:13,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:52:13,571 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:52:13,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-06 22:52:13,571 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:52:13,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:52:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1287409343, now seen corresponding path program 1 times [2024-11-06 22:52:13,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:52:13,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704489150] [2024-11-06 22:52:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:52:13,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:52:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 22:52:13,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324910250] [2024-11-06 22:52:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:52:13,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:52:13,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:52:13,595 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 22:52:13,596 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 22:52:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:52:13,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-06 22:52:13,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:52:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 22:52:14,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:53:13,071 WARN L286 SmtUtils]: Spent 16.07s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-06 22:53:33,204 WARN L286 SmtUtils]: Spent 16.09s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-06 22:53:41,216 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)