./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 e4b995352c2aa614292d7ca8e2ab060aead2140bac61fbd718d54a02f08e13c4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 19:52:04,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 19:52:04,577 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 19:52:04,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 19:52:04,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 19:52:04,601 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 19:52:04,602 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 19:52:04,602 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 19:52:04,603 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 19:52:04,604 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 19:52:04,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 19:52:04,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 19:52:04,605 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 19:52:04,605 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 19:52:04,606 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 19:52:04,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 19:52:04,606 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 19:52:04,607 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 19:52:04,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 19:52:04,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 19:52:04,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 19:52:04,609 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 19:52:04,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 19:52:04,609 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 19:52:04,609 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 19:52:04,609 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 19:52:04,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 19:52:04,610 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 19:52:04,610 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 19:52:04,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 19:52:04,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 19:52:04,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 19:52:04,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:52:04,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 19:52:04,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 19:52:04,611 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 19:52:04,611 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 19:52:04,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 19:52:04,611 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 19:52:04,611 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 19:52:04,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 19:52:04,612 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 19:52:04,613 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4b995352c2aa614292d7ca8e2ab060aead2140bac61fbd718d54a02f08e13c4 [2024-10-12 19:52:04,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 19:52:04,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 19:52:04,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 19:52:04,837 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 19:52:04,837 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 19:52:04,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c [2024-10-12 19:52:06,006 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 19:52:06,149 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 19:52:06,150 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c [2024-10-12 19:52:06,160 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe346ce68/1f2a0e1e15bb4eb9a1aa18aa27ea3589/FLAG6655d4c45 [2024-10-12 19:52:06,581 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe346ce68/1f2a0e1e15bb4eb9a1aa18aa27ea3589 [2024-10-12 19:52:06,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 19:52:06,585 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 19:52:06,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 19:52:06,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 19:52:06,593 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 19:52:06,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6462b8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06, skipping insertion in model container [2024-10-12 19:52:06,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,616 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 19:52:06,771 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c[987,1000] [2024-10-12 19:52:06,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:52:06,787 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 19:52:06,796 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c[987,1000] [2024-10-12 19:52:06,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:52:06,821 INFO L204 MainTranslator]: Completed translation [2024-10-12 19:52:06,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06 WrapperNode [2024-10-12 19:52:06,821 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 19:52:06,822 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 19:52:06,822 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 19:52:06,822 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 19:52:06,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,853 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-10-12 19:52:06,854 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 19:52:06,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 19:52:06,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 19:52:06,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 19:52:06,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,866 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,875 INFO L175 MemorySlicer]: Split 30 memory accesses to 5 slices as follows [2, 5, 4, 2, 17]. 57 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 2, 1, 2]. [2024-10-12 19:52:06,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,882 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 19:52:06,889 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 19:52:06,893 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 19:52:06,893 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 19:52:06,894 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (1/1) ... [2024-10-12 19:52:06,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:52:06,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:52:06,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 19:52:06,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 19:52:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 19:52:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 19:52:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 19:52:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 19:52:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 19:52:06,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-12 19:52:06,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 19:52:06,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 19:52:06,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 19:52:06,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 19:52:06,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 19:52:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-12 19:52:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 19:52:06,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 19:52:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 19:52:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 19:52:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 19:52:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 19:52:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-12 19:52:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2024-10-12 19:52:06,971 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2024-10-12 19:52:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 19:52:06,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 19:52:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 19:52:07,051 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 19:52:07,053 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 19:52:07,224 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-12 19:52:07,224 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 19:52:07,278 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 19:52:07,278 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-12 19:52:07,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:52:07 BoogieIcfgContainer [2024-10-12 19:52:07,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 19:52:07,280 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 19:52:07,280 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 19:52:07,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 19:52:07,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:52:06" (1/3) ... [2024-10-12 19:52:07,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797c8dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:52:07, skipping insertion in model container [2024-10-12 19:52:07,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:06" (2/3) ... [2024-10-12 19:52:07,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797c8dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:52:07, skipping insertion in model container [2024-10-12 19:52:07,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:52:07" (3/3) ... [2024-10-12 19:52:07,289 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps3-ll.c [2024-10-12 19:52:07,302 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 19:52:07,302 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 19:52:07,338 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 19:52:07,343 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;@47ad05e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 19:52:07,343 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 19:52:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:52:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 19:52:07,350 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:52:07,351 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:52:07,351 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:52:07,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:52:07,355 INFO L85 PathProgramCache]: Analyzing trace with hash -248335761, now seen corresponding path program 1 times [2024-10-12 19:52:07,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:52:07,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513755023] [2024-10-12 19:52:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:52:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:52:07,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869886612] [2024-10-12 19:52:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:07,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:07,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:52:07,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:52:07,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 19:52:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:52:07,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-12 19:52:07,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:52:07,637 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 [2024-10-12 19:52:07,647 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 [2024-10-12 19:52:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:52:07,767 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:52:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:52:07,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513755023] [2024-10-12 19:52:07,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:52:07,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869886612] [2024-10-12 19:52:07,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869886612] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:52:07,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:52:07,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-12 19:52:07,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153681829] [2024-10-12 19:52:07,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:52:07,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:52:07,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:52:07,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:52:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:52:07,791 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:52:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:52:07,944 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2024-10-12 19:52:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 19:52:07,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 19:52:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:52:07,952 INFO L225 Difference]: With dead ends: 50 [2024-10-12 19:52:07,952 INFO L226 Difference]: Without dead ends: 30 [2024-10-12 19:52:07,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-12 19:52:07,959 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:52:07,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 77 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:52:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-12 19:52:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-10-12 19:52:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-12 19:52:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-10-12 19:52:07,988 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2024-10-12 19:52:07,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:52:07,988 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-10-12 19:52:07,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:52:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-10-12 19:52:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 19:52:07,989 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:52:07,990 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:52:08,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 19:52:08,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-12 19:52:08,191 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:52:08,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:52:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2110697342, now seen corresponding path program 1 times [2024-10-12 19:52:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:52:08,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314967287] [2024-10-12 19:52:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:08,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:52:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:52:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199696017] [2024-10-12 19:52:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:08,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:52:08,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:52:08,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 19:52:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:52:08,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-12 19:52:08,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:52:08,396 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 [2024-10-12 19:52:08,401 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 [2024-10-12 19:52:08,536 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 [2024-10-12 19:52:08,542 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 [2024-10-12 19:52:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:52:08,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:52:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 19:52:08,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:52:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314967287] [2024-10-12 19:52:08,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:52:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199696017] [2024-10-12 19:52:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199696017] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:52:08,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:52:08,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2024-10-12 19:52:08,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699715241] [2024-10-12 19:52:08,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:52:08,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 19:52:08,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:52:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 19:52:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:52:08,816 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 15 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 19:52:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:52:09,172 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2024-10-12 19:52:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 19:52:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-12 19:52:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:52:09,175 INFO L225 Difference]: With dead ends: 57 [2024-10-12 19:52:09,176 INFO L226 Difference]: Without dead ends: 51 [2024-10-12 19:52:09,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-10-12 19:52:09,177 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:52:09,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 91 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:52:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-12 19:52:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2024-10-12 19:52:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-12 19:52:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-10-12 19:52:09,195 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2024-10-12 19:52:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:52:09,196 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-10-12 19:52:09,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 19:52:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-10-12 19:52:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 19:52:09,196 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:52:09,197 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:52:09,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 19:52:09,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-10-12 19:52:09,401 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:52:09,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:52:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1884088945, now seen corresponding path program 1 times [2024-10-12 19:52:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:52:09,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693241083] [2024-10-12 19:52:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:09,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:52:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:52:09,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586637653] [2024-10-12 19:52:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:09,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:09,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:52:09,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:52:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 19:52:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:52:09,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 19:52:09,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:52:09,522 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 [2024-10-12 19:52:09,527 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 [2024-10-12 19:52:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:52:09,625 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:52:09,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:52:09,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693241083] [2024-10-12 19:52:09,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:52:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586637653] [2024-10-12 19:52:09,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586637653] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:52:09,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:52:09,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-12 19:52:09,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48631161] [2024-10-12 19:52:09,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:52:09,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 19:52:09,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:52:09,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 19:52:09,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-12 19:52:09,629 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 19:52:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:52:09,714 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2024-10-12 19:52:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 19:52:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-12 19:52:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:52:09,715 INFO L225 Difference]: With dead ends: 51 [2024-10-12 19:52:09,716 INFO L226 Difference]: Without dead ends: 43 [2024-10-12 19:52:09,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-12 19:52:09,717 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:52:09,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:52:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-12 19:52:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-12 19:52:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-12 19:52:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-10-12 19:52:09,727 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 18 [2024-10-12 19:52:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:52:09,728 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-10-12 19:52:09,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-12 19:52:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-10-12 19:52:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 19:52:09,729 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:52:09,729 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:52:09,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 19:52:09,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:09,930 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:52:09,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:52:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1821742097, now seen corresponding path program 1 times [2024-10-12 19:52:09,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:52:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681115854] [2024-10-12 19:52:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:52:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:52:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745850579] [2024-10-12 19:52:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:09,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:09,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:52:09,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:52:09,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 19:52:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:52:10,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-10-12 19:52:10,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:52:10,086 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 [2024-10-12 19:52:10,089 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 [2024-10-12 19:52:10,096 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 [2024-10-12 19:52:10,378 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 [2024-10-12 19:52:10,387 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 [2024-10-12 19:52:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 19:52:10,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:52:11,058 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 46 treesize of output 22 [2024-10-12 19:52:11,065 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 22 treesize of output 18 [2024-10-12 19:52:11,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:52:11,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681115854] [2024-10-12 19:52:11,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:52:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745850579] [2024-10-12 19:52:11,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745850579] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:52:11,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:52:11,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-12 19:52:11,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808597766] [2024-10-12 19:52:11,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:52:11,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 19:52:11,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:52:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 19:52:11,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:52:11,305 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:52:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:52:11,514 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2024-10-12 19:52:11,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 19:52:11,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-10-12 19:52:11,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:52:11,516 INFO L225 Difference]: With dead ends: 49 [2024-10-12 19:52:11,516 INFO L226 Difference]: Without dead ends: 39 [2024-10-12 19:52:11,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-10-12 19:52:11,517 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:52:11,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:52:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-12 19:52:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-12 19:52:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-12 19:52:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-10-12 19:52:11,529 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2024-10-12 19:52:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:52:11,532 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-10-12 19:52:11,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:52:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-10-12 19:52:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-12 19:52:11,533 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:52:11,533 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:52:11,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 19:52:11,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:11,734 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:52:11,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:52:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2029722161, now seen corresponding path program 2 times [2024-10-12 19:52:11,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:52:11,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419238110] [2024-10-12 19:52:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:11,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:52:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:52:11,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828863901] [2024-10-12 19:52:11,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:52:11,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:11,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:52:11,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:52:11,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 19:52:11,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:52:11,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:52:11,909 WARN L253 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-10-12 19:52:11,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:52:11,920 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 [2024-10-12 19:52:11,926 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 [2024-10-12 19:52:11,931 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 [2024-10-12 19:52:12,394 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 13 treesize of output 9 [2024-10-12 19:52:13,002 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 [2024-10-12 19:52:13,010 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-12 19:52:13,011 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 3 [2024-10-12 19:52:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 19:52:13,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:52:15,732 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 14 treesize of output 10 [2024-10-12 19:52:28,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:52:28,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419238110] [2024-10-12 19:52:28,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:52:28,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828863901] [2024-10-12 19:52:28,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828863901] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:52:28,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:52:28,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-12 19:52:28,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348949863] [2024-10-12 19:52:28,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:52:28,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 19:52:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:52:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 19:52:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2024-10-12 19:52:28,586 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 19:52:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:52:30,181 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2024-10-12 19:52:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 19:52:30,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2024-10-12 19:52:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:52:30,183 INFO L225 Difference]: With dead ends: 47 [2024-10-12 19:52:30,183 INFO L226 Difference]: Without dead ends: 41 [2024-10-12 19:52:30,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2024-10-12 19:52:30,184 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:52:30,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-12 19:52:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-12 19:52:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-12 19:52:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-12 19:52:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-10-12 19:52:30,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 42 [2024-10-12 19:52:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:52:30,192 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-10-12 19:52:30,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-12 19:52:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-10-12 19:52:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 19:52:30,193 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:52:30,193 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:52:30,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 19:52:30,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:30,394 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:52:30,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:52:30,394 INFO L85 PathProgramCache]: Analyzing trace with hash -607493329, now seen corresponding path program 3 times [2024-10-12 19:52:30,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:52:30,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333932987] [2024-10-12 19:52:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:52:30,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:52:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:52:30,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565108783] [2024-10-12 19:52:30,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 19:52:30,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:52:30,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:52:30,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:52:30,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 19:52:30,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 19:52:30,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:52:30,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-10-12 19:52:30,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:52:30,785 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 [2024-10-12 19:52:30,789 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 [2024-10-12 19:52:31,123 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 [2024-10-12 19:52:31,127 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 [2024-10-12 19:52:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-12 19:52:31,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:52:39,507 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 46 treesize of output 42 [2024-10-12 19:52:39,519 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 42 treesize of output 18 [2024-10-12 19:53:16,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:53:16,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333932987] [2024-10-12 19:53:16,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:53:16,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565108783] [2024-10-12 19:53:16,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565108783] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:53:16,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:53:16,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-12 19:53:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351500548] [2024-10-12 19:53:16,728 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:53:16,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-12 19:53:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:53:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-12 19:53:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=436, Unknown=7, NotChecked=0, Total=506 [2024-10-12 19:53:16,729 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 16 states, 12 states have (on average 2.0) internal successors, (24), 14 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 19:53:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:53:17,230 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2024-10-12 19:53:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 19:53:17,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.0) internal successors, (24), 14 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2024-10-12 19:53:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:53:17,232 INFO L225 Difference]: With dead ends: 49 [2024-10-12 19:53:17,232 INFO L226 Difference]: Without dead ends: 43 [2024-10-12 19:53:17,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=92, Invalid=603, Unknown=7, NotChecked=0, Total=702 [2024-10-12 19:53:17,233 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 19:53:17,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 91 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 19:53:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-12 19:53:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-12 19:53:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-12 19:53:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-10-12 19:53:17,246 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 54 [2024-10-12 19:53:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:53:17,247 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-10-12 19:53:17,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.0) internal successors, (24), 14 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 19:53:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-10-12 19:53:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-12 19:53:17,248 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:53:17,248 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:53:17,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 19:53:17,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:53:17,449 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:53:17,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:53:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash -496319473, now seen corresponding path program 4 times [2024-10-12 19:53:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:53:17,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501764528] [2024-10-12 19:53:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:53:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:53:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:53:17,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037965227] [2024-10-12 19:53:17,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 19:53:17,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:53:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:53:17,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:53:17,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 19:53:17,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 19:53:17,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:53:17,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-10-12 19:53:17,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:53:17,940 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 17 treesize of output 9 [2024-10-12 19:53:18,111 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 27 treesize of output 19 [2024-10-12 19:53:18,293 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 17 treesize of output 9 [2024-10-12 19:53:18,347 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 88 treesize of output 40 [2024-10-12 19:53:18,357 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 29 treesize of output 21 [2024-10-12 19:53:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 49 proven. 37 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-12 19:53:18,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:53:21,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 19:53:21,743 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 347 treesize of output 346 [2024-10-12 19:53:29,799 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse2 (select .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (and (= (let ((.cse0 (select (select (store |c_#memory_int#4| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse1 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse2 3))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* (* .cse0 .cse0) 3) (* 2 (* .cse0 .cse0 .cse0)) .cse0)) (+ 84 (* 21 (* .cse2 .cse2)) (* 2 (* .cse2 .cse2 .cse2)) (* .cse2 73))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (not (= (mod (+ (* .cse2 .cse2 3) .cse2 (* .cse2 .cse2 .cse2 2)) 6) 0))))) is different from false [2024-10-12 19:53:37,841 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 19:53:45,853 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse1 (select .cse3 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (and (or (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_26| Int)) (= (* 6 (select (select |c_#memory_int#1| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_26|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_26|)) (let ((.cse0 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_26|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_26|))) (+ (* (* .cse0 .cse0) 3) .cse0 (* 2 (* .cse0 .cse0 .cse0)))))) (= (mod (+ (* 3 .cse1 .cse1) .cse1 (* 2 .cse1 .cse1 .cse1)) 6) 0)) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_26| Int)) (or (not (= (+ (* 21 (* .cse1 .cse1)) 84 (* (* .cse1 .cse1 .cse1) 2) (* 73 .cse1)) (let ((.cse2 (select (select (store |c_old(#memory_int#4)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse3 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 3 .cse1))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_26|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_26|))) (+ (* (* .cse2 .cse2 .cse2) 2) .cse2 (* 3 (* .cse2 .cse2)))))) (= (let ((.cse4 (select (select |c_#memory_int#4| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_26|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_26|))) (+ (* (* .cse4 .cse4) 3) .cse4 (* 2 (* .cse4 .cse4 .cse4)))) (* 6 (select (select |c_#memory_int#1| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)))))))) is different from true