./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.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/recursified_nla-digbench/recursified_divbin2.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', '07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f'] 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/recursified_nla-digbench/recursified_divbin2.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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-06 23:52:29,208 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 23:52:29,299 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-06 23:52:29,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 23:52:29,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 23:52:29,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 23:52:29,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 23:52:29,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 23:52:29,338 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 23:52:29,339 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 23:52:29,339 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 23:52:29,339 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 23:52:29,340 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 23:52:29,340 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 23:52:29,340 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 23:52:29,341 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 23:52:29,341 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 23:52:29,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 23:52:29,342 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 23:52:29,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 23:52:29,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 23:52:29,342 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 23:52:29,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 23:52:29,342 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 23:52:29,342 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-06 23:52:29,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-06 23:52:29,343 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 23:52:29,343 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 23:52:29,343 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 23:52:29,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 23:52:29,343 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 -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f [2024-11-06 23:52:29,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 23:52:29,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 23:52:29,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 23:52:29,639 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 23:52:29,640 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 23:52:29,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-11-06 23:52:30,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 23:52:31,182 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 23:52:31,184 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-11-06 23:52:31,192 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/67c7deb83/a490f9443f9848c597d4728cbb0ebd2e/FLAG11de34665 [2024-11-06 23:52:31,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/67c7deb83/a490f9443f9848c597d4728cbb0ebd2e [2024-11-06 23:52:31,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 23:52:31,215 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-06 23:52:31,218 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 23:52:31,218 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 23:52:31,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 23:52:31,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774f0463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31, skipping insertion in model container [2024-11-06 23:52:31,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,240 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 23:52:31,382 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/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2024-11-06 23:52:31,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 23:52:31,413 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 23:52:31,425 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/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2024-11-06 23:52:31,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 23:52:31,457 INFO L204 MainTranslator]: Completed translation [2024-11-06 23:52:31,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31 WrapperNode [2024-11-06 23:52:31,459 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 23:52:31,460 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 23:52:31,460 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 23:52:31,461 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 23:52:31,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,476 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,501 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2024-11-06 23:52:31,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 23:52:31,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 23:52:31,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 23:52:31,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 23:52:31,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,518 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,538 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 7, 11, 3, 7, 4]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 2, 3, 1, 3, 1]. [2024-11-06 23:52:31,538 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,539 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,547 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,549 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 23:52:31,554 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 23:52:31,554 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 23:52:31,554 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 23:52:31,555 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (1/1) ... [2024-11-06 23:52:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 23:52:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:31,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-06 23:52:31,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-06 23:52:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 23:52:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-11-06 23:52:31,619 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-11-06 23:52:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-06 23:52:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-06 23:52:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-06 23:52:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-06 23:52:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-06 23:52:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-06 23:52:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-06 23:52:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-06 23:52:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-06 23:52:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-06 23:52:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-06 23:52:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-06 23:52:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-06 23:52:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-11-06 23:52:31,621 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-11-06 23:52:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 23:52:31,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 23:52:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-06 23:52:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-06 23:52:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-06 23:52:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-06 23:52:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-06 23:52:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-06 23:52:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-06 23:52:31,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-06 23:52:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-06 23:52:31,746 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 23:52:31,748 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 23:52:31,937 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-06 23:52:31,938 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 23:52:31,947 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 23:52:31,947 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-06 23:52:31,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:52:31 BoogieIcfgContainer [2024-11-06 23:52:31,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 23:52:31,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 23:52:31,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 23:52:31,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 23:52:31,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:52:31" (1/3) ... [2024-11-06 23:52:31,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fadd697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:52:31, skipping insertion in model container [2024-11-06 23:52:31,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:31" (2/3) ... [2024-11-06 23:52:31,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fadd697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:52:31, skipping insertion in model container [2024-11-06 23:52:31,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:52:31" (3/3) ... [2024-11-06 23:52:31,957 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-11-06 23:52:31,972 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 23:52:31,973 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 23:52:32,015 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 23:52:32,025 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;@20e37cad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 23:52:32,025 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 23:52:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 23:52:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-06 23:52:32,037 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:32,037 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:32,037 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:32,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash 536553344, now seen corresponding path program 1 times [2024-11-06 23:52:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391833132] [2024-11-06 23:52:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:32,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:32,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:52:32,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:32,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391833132] [2024-11-06 23:52:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391833132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:52:32,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:52:32,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-06 23:52:32,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30116592] [2024-11-06 23:52:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:52:32,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-06 23:52:32,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-06 23:52:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 23:52:32,333 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 23:52:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:32,433 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2024-11-06 23:52:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-06 23:52:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-06 23:52:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:32,440 INFO L225 Difference]: With dead ends: 59 [2024-11-06 23:52:32,440 INFO L226 Difference]: Without dead ends: 31 [2024-11-06 23:52:32,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:52:32,448 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:32,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:52:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-06 23:52:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2024-11-06 23:52:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-06 23:52:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-06 23:52:32,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2024-11-06 23:52:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:32,480 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-06 23:52:32,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 23:52:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-06 23:52:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-06 23:52:32,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:32,482 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:32,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-06 23:52:32,482 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:32,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:32,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1537066275, now seen corresponding path program 1 times [2024-11-06 23:52:32,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:32,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945134119] [2024-11-06 23:52:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:32,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:52:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970721867] [2024-11-06 23:52:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:32,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:32,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:52:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-06 23:52:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:32,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-06 23:52:32,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:32,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:52:32,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:32,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:33,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:52:33,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 23:52:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:52:33,138 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 23:52:33,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:33,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945134119] [2024-11-06 23:52:33,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:52:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970721867] [2024-11-06 23:52:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970721867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:52:33,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:52:33,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-06 23:52:33,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549992539] [2024-11-06 23:52:33,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:52:33,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 23:52:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 23:52:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-06 23:52:33,145 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 23:52:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:33,420 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-11-06 23:52:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 23:52:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-06 23:52:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:33,422 INFO L225 Difference]: With dead ends: 55 [2024-11-06 23:52:33,422 INFO L226 Difference]: Without dead ends: 51 [2024-11-06 23:52:33,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-06 23:52:33,424 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:33,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 144 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 23:52:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-06 23:52:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2024-11-06 23:52:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-06 23:52:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-06 23:52:33,434 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 15 [2024-11-06 23:52:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:33,435 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-06 23:52:33,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 23:52:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-06 23:52:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-06 23:52:33,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:33,436 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:33,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-06 23:52:33,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:33,641 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:33,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash -53331565, now seen corresponding path program 1 times [2024-11-06 23:52:33,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:33,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338266644] [2024-11-06 23:52:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:33,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:52:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355111217] [2024-11-06 23:52:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:33,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:33,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:52:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-06 23:52:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:33,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-06 23:52:33,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:33,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:33,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:33,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:52:33,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:33,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:34,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:52:34,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-11-06 23:52:35,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:52:35,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2024-11-06 23:52:35,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:52:35,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 65 [2024-11-06 23:52:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:52:35,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:52:35,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338266644] [2024-11-06 23:52:35,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:52:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355111217] [2024-11-06 23:52:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355111217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:52:35,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:52:35,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-06 23:52:35,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800747511] [2024-11-06 23:52:35,835 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 23:52:35,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-06 23:52:35,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-06 23:52:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-11-06 23:52:35,837 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 4 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 23:52:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:36,889 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2024-11-06 23:52:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-06 23:52:36,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2024-11-06 23:52:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:36,893 INFO L225 Difference]: With dead ends: 99 [2024-11-06 23:52:36,893 INFO L226 Difference]: Without dead ends: 47 [2024-11-06 23:52:36,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-11-06 23:52:36,894 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:36,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 163 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-06 23:52:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-06 23:52:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-06 23:52:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-06 23:52:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-11-06 23:52:36,908 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 25 [2024-11-06 23:52:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:36,908 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-11-06 23:52:36,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 4 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 23:52:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-11-06 23:52:36,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-06 23:52:36,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:36,910 INFO L215 NwaCegarLoop]: trace histogram [2, 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] [2024-11-06 23:52:36,927 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 23:52:37,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:37,112 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:37,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1394959462, now seen corresponding path program 1 times [2024-11-06 23:52:37,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:37,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451445881] [2024-11-06 23:52:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:37,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:37,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:37,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 23:52:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:38,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:52:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:38,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 23:52:38,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:38,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451445881] [2024-11-06 23:52:38,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451445881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:52:38,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750753534] [2024-11-06 23:52:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:38,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:38,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:52:38,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-06 23:52:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:38,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-06 23:52:38,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:38,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:38,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:38,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:52:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 23:52:38,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:52:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750753534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:52:39,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 23:52:39,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-06 23:52:39,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820581458] [2024-11-06 23:52:39,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 23:52:39,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-06 23:52:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-06 23:52:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-06 23:52:39,378 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 20 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-06 23:52:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:39,933 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-11-06 23:52:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-06 23:52:39,935 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 31 [2024-11-06 23:52:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:39,936 INFO L225 Difference]: With dead ends: 62 [2024-11-06 23:52:39,936 INFO L226 Difference]: Without dead ends: 56 [2024-11-06 23:52:39,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2024-11-06 23:52:39,938 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:39,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 62 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-06 23:52:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-06 23:52:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-06 23:52:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-06 23:52:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-06 23:52:39,959 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 31 [2024-11-06 23:52:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:39,960 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-06 23:52:39,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-06 23:52:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-06 23:52:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-06 23:52:39,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:39,961 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:39,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-06 23:52:40,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:40,162 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:40,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash 499919073, now seen corresponding path program 2 times [2024-11-06 23:52:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800241242] [2024-11-06 23:52:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:40,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:40,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:40,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 23:52:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:41,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 23:52:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:41,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-06 23:52:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:41,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 23:52:41,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800241242] [2024-11-06 23:52:41,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800241242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:52:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528736183] [2024-11-06 23:52:41,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 23:52:41,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:41,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:41,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:52:41,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-06 23:52:41,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 23:52:41,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 23:52:41,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-06 23:52:41,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:41,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:41,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:41,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:41,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:52:41,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:42,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:52:42,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:52:42,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2024-11-06 23:52:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-06 23:52:59,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:53:00,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528736183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:53:00,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 23:53:00,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2024-11-06 23:53:00,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218355954] [2024-11-06 23:53:00,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 23:53:00,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-06 23:53:00,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:53:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-06 23:53:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1327, Unknown=4, NotChecked=0, Total=1482 [2024-11-06 23:53:00,674 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 31 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 26 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-06 23:53:51,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 23:54:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:54:00,074 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2024-11-06 23:54:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-06 23:54:00,075 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 26 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Word has length 37 [2024-11-06 23:54:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:54:00,077 INFO L225 Difference]: With dead ends: 126 [2024-11-06 23:54:00,077 INFO L226 Difference]: Without dead ends: 118 [2024-11-06 23:54:00,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 71.7s TimeCoverageRelationStatistics Valid=503, Invalid=3770, Unknown=17, NotChecked=0, Total=4290 [2024-11-06 23:54:00,079 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-06 23:54:00,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1130 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-11-06 23:54:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-06 23:54:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2024-11-06 23:54:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 74 states have internal predecessors, (82), 18 states have call successors, (18), 14 states have call predecessors, (18), 19 states have return successors, (29), 20 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-06 23:54:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2024-11-06 23:54:00,120 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 37 [2024-11-06 23:54:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:54:00,120 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2024-11-06 23:54:00,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 26 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-06 23:54:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2024-11-06 23:54:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-06 23:54:00,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:54:00,122 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:54:00,138 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 23:54:00,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:54:00,322 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:54:00,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:54:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash 203160982, now seen corresponding path program 1 times [2024-11-06 23:54:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:54:00,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757158218] [2024-11-06 23:54:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:54:00,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:54:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:54:00,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595972010] [2024-11-06 23:54:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:54:00,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:54:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:54:00,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 23:54:00,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-06 23:54:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:54:00,598 WARN L253 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 182 conjuncts are in the unsatisfiable core [2024-11-06 23:54:00,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:54:00,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:54:00,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:54:00,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:54:00,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:54:00,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:54:00,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:54:01,441 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-06 23:54:01,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-11-06 23:54:01,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:54:01,525 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-11-06 23:54:01,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2024-11-06 23:54:01,598 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-06 23:54:01,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-06 23:54:01,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:54:01,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 177 [2024-11-06 23:54:01,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:54:01,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 175 [2024-11-06 23:54:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-06 23:54:02,221 INFO L311 TraceCheckSpWp]: Computing backward predicates...