./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml', '-i', '../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(G ! call(reach_error())) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', 'a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6'] 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/dijkstra-u_valuebound1.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-06 22:50:11,810 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 22:50:11,897 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-06 22:50:11,901 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 22:50:11,901 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 22:50:11,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 22:50:11,928 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 22:50:11,929 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 22:50:11,929 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 22:50:11,929 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 22:50:11,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 22:50:11,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 22:50:11,930 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 22:50:11,931 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 22:50:11,931 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 22:50:11,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 22:50:11,932 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 22:50:11,932 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 22:50:11,932 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-06 22:50:11,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 22:50:11,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 22:50:11,933 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 22:50:11,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 22:50:11,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-06 22:50:11,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-06 22:50:11,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 22:50:11,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 22:50:11,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 22:50:11,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 22:50:11,934 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 -> a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 [2024-11-06 22:50:12,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 22:50:12,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 22:50:12,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 22:50:12,262 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 22:50:12,262 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 22:50:12,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2024-11-06 22:50:13,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 22:50:13,744 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 22:50:13,745 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2024-11-06 22:50:13,753 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2f39c927d/f8f3d8f587584c00925bdbaf4e5b026c/FLAG8aa0c4f51 [2024-11-06 22:50:13,771 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2f39c927d/f8f3d8f587584c00925bdbaf4e5b026c [2024-11-06 22:50:13,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 22:50:13,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-06 22:50:13,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 22:50:13,778 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 22:50:13,782 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 22:50:13,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:13" (1/1) ... [2024-11-06 22:50:13,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465617cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:13, skipping insertion in model container [2024-11-06 22:50:13,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:13" (1/1) ... [2024-11-06 22:50:13,798 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 22:50:13,928 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/dijkstra-u_valuebound1.c[525,538] [2024-11-06 22:50:13,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 22:50:13,967 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 22:50:13,977 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/dijkstra-u_valuebound1.c[525,538] [2024-11-06 22:50:13,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 22:50:14,018 INFO L204 MainTranslator]: Completed translation [2024-11-06 22:50:14,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14 WrapperNode [2024-11-06 22:50:14,018 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 22:50:14,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 22:50:14,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 22:50:14,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 22:50:14,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,034 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,061 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2024-11-06 22:50:14,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 22:50:14,062 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 22:50:14,062 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 22:50:14,062 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 22:50:14,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,072 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,081 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 22:50:14,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,084 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,092 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 22:50:14,094 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 22:50:14,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 22:50:14,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 22:50:14,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (1/1) ... [2024-11-06 22:50:14,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 22:50:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:50:14,125 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 22:50:14,126 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 22:50:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 22:50:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-06 22:50:14,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-06 22:50:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-06 22:50:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 22:50:14,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 22:50:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-06 22:50:14,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-06 22:50:14,196 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 22:50:14,198 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 22:50:14,378 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-06 22:50:14,379 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 22:50:14,387 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 22:50:14,387 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-06 22:50:14,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:14 BoogieIcfgContainer [2024-11-06 22:50:14,387 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 22:50:14,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 22:50:14,390 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 22:50:14,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 22:50:14,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:50:13" (1/3) ... [2024-11-06 22:50:14,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223c4494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:14, skipping insertion in model container [2024-11-06 22:50:14,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:14" (2/3) ... [2024-11-06 22:50:14,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223c4494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:14, skipping insertion in model container [2024-11-06 22:50:14,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:14" (3/3) ... [2024-11-06 22:50:14,397 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2024-11-06 22:50:14,410 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 22:50:14,410 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 22:50:14,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 22:50:14,478 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;@119b50a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 22:50:14,479 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 22:50:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-06 22:50:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-06 22:50:14,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:50:14,490 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:50:14,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:50:14,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:50:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -645822239, now seen corresponding path program 1 times [2024-11-06 22:50:14,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:50:14,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745057096] [2024-11-06 22:50:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:50:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:14,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 22:50:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:14,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-06 22:50:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:50:14,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:50:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745057096] [2024-11-06 22:50:14,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745057096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:50:14,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:50:14,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-06 22:50:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440922472] [2024-11-06 22:50:14,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:50:14,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-06 22:50:14,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:50:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-06 22:50:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 22:50:14,703 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:50:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:50:14,724 INFO L93 Difference]: Finished difference Result 63 states and 107 transitions. [2024-11-06 22:50:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-06 22:50:14,726 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-06 22:50:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:50:14,734 INFO L225 Difference]: With dead ends: 63 [2024-11-06 22:50:14,734 INFO L226 Difference]: Without dead ends: 29 [2024-11-06 22:50:14,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 22:50:14,739 INFO L432 NwaCegarLoop]: 44 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, 44 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 22:50:14,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:50:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-06 22:50:14,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-06 22:50:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-06 22:50:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-11-06 22:50:14,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 19 [2024-11-06 22:50:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:50:14,777 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-11-06 22:50:14,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:50:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-11-06 22:50:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-06 22:50:14,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:50:14,778 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:50:14,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-06 22:50:14,779 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:50:14,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:50:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085840, now seen corresponding path program 1 times [2024-11-06 22:50:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:50:14,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394839780] [2024-11-06 22:50:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:50:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:15,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 22:50:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:15,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-06 22:50:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:50:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:50:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394839780] [2024-11-06 22:50:15,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394839780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:50:15,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:50:15,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-06 22:50:15,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848954883] [2024-11-06 22:50:15,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:50:15,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 22:50:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:50:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 22:50:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 22:50:15,253 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:50:19,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:50:23,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:50:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:50:23,475 INFO L93 Difference]: Finished difference Result 61 states and 89 transitions. [2024-11-06 22:50:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 22:50:23,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-06 22:50:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:50:23,489 INFO L225 Difference]: With dead ends: 61 [2024-11-06 22:50:23,489 INFO L226 Difference]: Without dead ends: 43 [2024-11-06 22:50:23,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-06 22:50:23,491 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-06 22:50:23,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 166 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-11-06 22:50:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-06 22:50:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-06 22:50:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-06 22:50:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2024-11-06 22:50:23,511 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 20 [2024-11-06 22:50:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:50:23,511 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2024-11-06 22:50:23,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:50:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2024-11-06 22:50:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-06 22:50:23,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:50:23,513 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:50:23,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-06 22:50:23,513 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:50:23,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:50:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash -332038773, now seen corresponding path program 1 times [2024-11-06 22:50:23,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:50:23,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629044877] [2024-11-06 22:50:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:23,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:50:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:23,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 22:50:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:23,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-06 22:50:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:50:23,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:50:23,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629044877] [2024-11-06 22:50:23,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629044877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:50:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454554103] [2024-11-06 22:50:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:50:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:50:23,938 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 22:50:23,940 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 22:50:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:23,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-06 22:50:23,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:50:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:50:24,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:50:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:50:24,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454554103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:50:24,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:50:24,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-06 22:50:24,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500056494] [2024-11-06 22:50:24,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:50:24,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-06 22:50:24,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:50:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-06 22:50:24,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-06 22:50:24,375 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:50:28,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:50:32,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:50:37,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:50:41,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:50:45,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:50:46,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:50:46,009 INFO L93 Difference]: Finished difference Result 134 states and 217 transitions. [2024-11-06 22:50:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-06 22:50:46,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-06 22:50:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:50:46,012 INFO L225 Difference]: With dead ends: 134 [2024-11-06 22:50:46,013 INFO L226 Difference]: Without dead ends: 116 [2024-11-06 22:50:46,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-11-06 22:50:46,014 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 28 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 155 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2024-11-06 22:50:46,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 315 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 220 Invalid, 5 Unknown, 0 Unchecked, 21.4s Time] [2024-11-06 22:50:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-06 22:50:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2024-11-06 22:50:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.263157894736842) internal successors, (48), 41 states have internal predecessors, (48), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-06 22:50:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2024-11-06 22:50:46,035 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 97 transitions. Word has length 22 [2024-11-06 22:50:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:50:46,035 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 97 transitions. [2024-11-06 22:50:46,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 22:50:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 97 transitions. [2024-11-06 22:50:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-06 22:50:46,036 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:50:46,036 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:50:46,054 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 22:50:46,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:50:46,240 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:50:46,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:50:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1041809680, now seen corresponding path program 1 times [2024-11-06 22:50:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:50:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800284832] [2024-11-06 22:50:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:50:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 22:50:46,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675594171] [2024-11-06 22:50:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:46,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:50:46,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:50:46,281 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 22:50:46,283 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 22:50:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:46,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 22:50:46,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:50:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-06 22:50:46,425 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 22:50:46,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:50:46,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800284832] [2024-11-06 22:50:46,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 22:50:46,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675594171] [2024-11-06 22:50:46,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675594171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:50:46,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:50:46,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 22:50:46,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535252811] [2024-11-06 22:50:46,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:50:46,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 22:50:46,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:50:46,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 22:50:46,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-06 22:50:46,428 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 22:50:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:50:46,547 INFO L93 Difference]: Finished difference Result 95 states and 136 transitions. [2024-11-06 22:50:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 22:50:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-06 22:50:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:50:46,550 INFO L225 Difference]: With dead ends: 95 [2024-11-06 22:50:46,550 INFO L226 Difference]: Without dead ends: 92 [2024-11-06 22:50:46,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 22:50:46,551 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 22:50:46,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 130 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 22:50:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-06 22:50:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-06 22:50:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 50 states have internal predecessors, (58), 38 states have call successors, (38), 6 states have call predecessors, (38), 6 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-06 22:50:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 132 transitions. [2024-11-06 22:50:46,578 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 132 transitions. Word has length 30 [2024-11-06 22:50:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:50:46,579 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 132 transitions. [2024-11-06 22:50:46,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 22:50:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 132 transitions. [2024-11-06 22:50:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-06 22:50:46,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:50:46,580 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:50:46,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-06 22:50:46,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:50:46,781 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:50:46,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:50:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1015454531, now seen corresponding path program 1 times [2024-11-06 22:50:46,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:50:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315884029] [2024-11-06 22:50:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:46,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:50:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:46,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 22:50:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:46,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-06 22:50:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:46,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-06 22:50:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 22:50:46,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:50:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315884029] [2024-11-06 22:50:46,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315884029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:50:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610856802] [2024-11-06 22:50:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:46,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:50:46,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:50:46,960 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 22:50:46,961 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 22:50:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:47,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-06 22:50:47,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:50:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:50:47,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:50:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 22:50:47,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610856802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:50:47,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:50:47,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-06 22:50:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114516913] [2024-11-06 22:50:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:50:47,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-06 22:50:47,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:50:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-06 22:50:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-06 22:50:47,255 INFO L87 Difference]: Start difference. First operand 92 states and 132 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-06 22:50:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:50:48,101 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2024-11-06 22:50:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-06 22:50:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2024-11-06 22:50:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:50:48,103 INFO L225 Difference]: With dead ends: 121 [2024-11-06 22:50:48,103 INFO L226 Difference]: Without dead ends: 75 [2024-11-06 22:50:48,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-06 22:50:48,104 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-06 22:50:48,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 194 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-06 22:50:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-06 22:50:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-11-06 22:50:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 34 states have (on average 1.088235294117647) internal successors, (37), 37 states have internal predecessors, (37), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-06 22:50:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2024-11-06 22:50:48,126 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 29 [2024-11-06 22:50:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:50:48,126 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2024-11-06 22:50:48,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-06 22:50:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2024-11-06 22:50:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-06 22:50:48,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:50:48,128 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:50:48,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-06 22:50:48,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:50:48,329 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:50:48,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:50:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1168270398, now seen corresponding path program 1 times [2024-11-06 22:50:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:50:48,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476767514] [2024-11-06 22:50:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:48,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:50:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 22:50:48,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025578110] [2024-11-06 22:50:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:50:48,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:50:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:50:48,370 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 22:50:48,371 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 22:50:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:50:48,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-06 22:50:48,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:50:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-06 22:50:48,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:51:04,777 WARN L851 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1|)) 4294967296) 0)) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~n~0#1| 4294967295)) 4294967296) 0)) is different from false [2024-11-06 22:51:14,657 WARN L286 SmtUtils]: Spent 8.02s 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 22:51:42,863 WARN L286 SmtUtils]: Spent 8.02s 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 22:51:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-06 22:51:46,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:51:46,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476767514] [2024-11-06 22:51:46,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 22:51:46,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025578110] [2024-11-06 22:51:46,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025578110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:51:46,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 22:51:46,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-06 22:51:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265392484] [2024-11-06 22:51:46,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 22:51:46,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-06 22:51:46,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:51:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-06 22:51:46,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=67, Unknown=1, NotChecked=16, Total=110 [2024-11-06 22:51:46,952 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-06 22:51:51,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-06 22:51:55,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []