./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:40:38,512 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:40:38,575 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:40:38,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:40:38,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:40:38,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:40:38,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:40:38,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:40:38,602 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:40:38,602 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:40:38,603 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:40:38,603 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:40:38,604 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:40:38,604 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:40:38,605 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:40:38,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:40:38,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:40:38,606 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:40:38,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:40:38,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:40:38,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:40:38,610 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:40:38,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:40:38,611 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:40:38,611 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:40:38,612 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:40:38,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:40:38,612 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:40:38,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:40:38,613 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:40:38,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:40:38,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:40:38,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:40:38,618 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:40:38,618 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:40:38,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:40:38,619 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:40:38,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:40:38,619 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:40:38,619 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:40:38,620 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:40:38,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:40:38,620 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:40:38,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:40:38,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:40:38,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:40:38,901 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:40:38,901 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:40:38,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-09-11 20:40:40,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:40:40,512 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:40:40,513 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-09-11 20:40:40,519 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/85e81dbb7/0612f3396dd54a459ab7460a4919d2ed/FLAG4ca8f2441 [2024-09-11 20:40:40,905 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/85e81dbb7/0612f3396dd54a459ab7460a4919d2ed [2024-09-11 20:40:40,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:40:40,910 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:40:40,911 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:40:40,911 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:40:40,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:40:40,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:40:40" (1/1) ... [2024-09-11 20:40:40,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ac7573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:40, skipping insertion in model container [2024-09-11 20:40:40,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:40:40" (1/1) ... [2024-09-11 20:40:40,940 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:40:41,079 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-09-11 20:40:41,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:40:41,104 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:40:41,115 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-09-11 20:40:41,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:40:41,144 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:40:41,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41 WrapperNode [2024-09-11 20:40:41,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:40:41,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:40:41,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:40:41,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:40:41,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,162 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,184 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-09-11 20:40:41,186 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:40:41,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:40:41,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:40:41,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:40:41,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,231 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 3, 27, 5, 4]. 66 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, 1, 2, 2, 2]. [2024-09-11 20:40:41,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,241 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,247 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,253 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,256 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:40:41,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:40:41,257 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:40:41,257 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:40:41,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (1/1) ... [2024-09-11 20:40:41,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:40:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:41,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 20:40:41,306 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 20:40:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:40:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:40:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:40:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:40:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:40:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:40:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:40:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:40:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:40:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:40:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:40:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:40:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:40:41,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:40:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:40:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:40:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:40:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:40:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:40:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2024-09-11 20:40:41,363 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2024-09-11 20:40:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:40:41,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:40:41,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:40:41,471 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:40:41,474 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:40:41,708 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-11 20:40:41,708 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:40:41,738 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:40:41,738 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 20:40:41,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:40:41 BoogieIcfgContainer [2024-09-11 20:40:41,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:40:41,746 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:40:41,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:40:41,750 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:40:41,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:40:40" (1/3) ... [2024-09-11 20:40:41,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d97d1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:40:41, skipping insertion in model container [2024-09-11 20:40:41,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:40:41" (2/3) ... [2024-09-11 20:40:41,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d97d1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:40:41, skipping insertion in model container [2024-09-11 20:40:41,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:40:41" (3/3) ... [2024-09-11 20:40:41,757 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2024-09-11 20:40:41,770 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:40:41,770 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:40:41,825 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:40:41,831 INFO L336 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=All, 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;@3661bc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:40:41,832 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:40:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:40:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 20:40:41,843 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:41,843 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:40:41,844 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:41,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash -32795157, now seen corresponding path program 1 times [2024-09-11 20:40:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:41,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745060043] [2024-09-11 20:40:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:41,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:40:42,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993984260] [2024-09-11 20:40:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:42,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:42,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:40:42,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:40:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:42,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-11 20:40:42,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:42,240 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 [2024-09-11 20:40:42,252 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 [2024-09-11 20:40:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:40:42,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:40:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745060043] [2024-09-11 20:40:42,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:40:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993984260] [2024-09-11 20:40:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993984260] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:40:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:40:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-11 20:40:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644522458] [2024-09-11 20:40:42,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:40:42,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:40:42,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:40:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:40:42,480 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2024-09-11 20:40:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:42,720 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2024-09-11 20:40:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:40:42,724 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 [2024-09-11 20:40:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:42,731 INFO L225 Difference]: With dead ends: 56 [2024-09-11 20:40:42,732 INFO L226 Difference]: Without dead ends: 34 [2024-09-11 20:40:42,735 INFO L433 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 [2024-09-11 20:40:42,738 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:42,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:40:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-11 20:40:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-09-11 20:40:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-11 20:40:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-11 20:40:42,773 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2024-09-11 20:40:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:42,773 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-11 20:40:42,773 INFO L475 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) [2024-09-11 20:40:42,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-11 20:40:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 20:40:42,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:42,776 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:40:42,791 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 20:40:42,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-11 20:40:42,981 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:42,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash -354243652, now seen corresponding path program 1 times [2024-09-11 20:40:42,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:42,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600453734] [2024-09-11 20:40:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:42,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:40:43,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231406125] [2024-09-11 20:40:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:43,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:43,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:40:43,087 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:40:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:43,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-11 20:40:43,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:43,226 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 [2024-09-11 20:40:43,231 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 [2024-09-11 20:40:43,468 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 [2024-09-11 20:40:43,477 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 [2024-09-11 20:40:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:40:43,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600453734] [2024-09-11 20:42:39,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:39,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231406125] [2024-09-11 20:42:39,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231406125] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:42:39,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:42:39,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-11 20:42:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368681731] [2024-09-11 20:42:39,525 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:39,526 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:42:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:42:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2024-09-11 20:42:39,528 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:42:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:39,978 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2024-09-11 20:42:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 20:42:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-11 20:42:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:39,983 INFO L225 Difference]: With dead ends: 57 [2024-09-11 20:42:39,984 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 20:42:39,985 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 116.0s TimeCoverageRelationStatistics Valid=89, Invalid=414, Unknown=3, NotChecked=0, Total=506 [2024-09-11 20:42:39,989 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:39,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 120 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:42:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 20:42:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-09-11 20:42:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-11 20:42:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-09-11 20:42:40,014 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 18 [2024-09-11 20:42:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:40,015 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-09-11 20:42:40,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:42:40,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-09-11 20:42:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 20:42:40,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:40,018 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:40,039 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 20:42:40,223 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:40,224 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:40,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1904549241, now seen corresponding path program 1 times [2024-09-11 20:42:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:40,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165195144] [2024-09-11 20:42:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:40,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505491715] [2024-09-11 20:42:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:40,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:40,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:40,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:40,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:42:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:42:40,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 20:42:40,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:40,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:42:40,425 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 [2024-09-11 20:42:40,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:42:40,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:42:40,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:42:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:42:40,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:42:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165195144] [2024-09-11 20:42:40,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505491715] [2024-09-11 20:42:40,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505491715] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:42:40,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:42:40,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-11 20:42:40,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295925812] [2024-09-11 20:42:40,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:42:40,698 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 20:42:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:40,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 20:42:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:42:40,704 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2024-09-11 20:42:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:41,049 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2024-09-11 20:42:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:42:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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 [2024-09-11 20:42:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:41,051 INFO L225 Difference]: With dead ends: 61 [2024-09-11 20:42:41,052 INFO L226 Difference]: Without dead ends: 57 [2024-09-11 20:42:41,052 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-11 20:42:41,053 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:41,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:42:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-11 20:42:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-11 20:42:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-11 20:42:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-11 20:42:41,070 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 18 [2024-09-11 20:42:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:41,071 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-11 20:42:41,071 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 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) [2024-09-11 20:42:41,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-11 20:42:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-11 20:42:41,072 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:41,072 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:41,090 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:42:41,272 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-11 20:42:41,273 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:41,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash -956929769, now seen corresponding path program 1 times [2024-09-11 20:42:41,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:41,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603393007] [2024-09-11 20:42:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:41,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:41,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235692712] [2024-09-11 20:42:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:41,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:41,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:41,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:41,333 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:42:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:42:41,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-11 20:42:41,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:41,436 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 [2024-09-11 20:42:41,445 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 [2024-09-11 20:42:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:42:41,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:41,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:41,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603393007] [2024-09-11 20:42:41,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:41,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235692712] [2024-09-11 20:42:41,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235692712] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:42:41,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:42:41,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-11 20:42:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358727464] [2024-09-11 20:42:41,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:41,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:42:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:41,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:42:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:42:41,895 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:42:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:42,143 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2024-09-11 20:42:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:42:42,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-11 20:42:42,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:42,145 INFO L225 Difference]: With dead ends: 59 [2024-09-11 20:42:42,148 INFO L226 Difference]: Without dead ends: 45 [2024-09-11 20:42:42,148 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:42:42,149 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:42,150 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:42:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-11 20:42:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-11 20:42:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-11 20:42:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-09-11 20:42:42,170 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2024-09-11 20:42:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:42,171 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-09-11 20:42:42,171 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:42:42,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-09-11 20:42:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 20:42:42,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:42,176 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-11 20:42:42,194 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 20:42:42,380 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:42,381 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:42,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1213821005, now seen corresponding path program 2 times [2024-09-11 20:42:42,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:42,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082368680] [2024-09-11 20:42:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:42,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:42,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655883779] [2024-09-11 20:42:42,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:42:42,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:42,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:42,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:42,469 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:42:45,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:42:45,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:42:45,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-11 20:42:45,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:45,102 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 [2024-09-11 20:42:45,108 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 [2024-09-11 20:42:45,211 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 34 treesize of output 26 [2024-09-11 20:42:45,219 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 [2024-09-11 20:42:45,327 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 [2024-09-11 20:42:45,332 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 [2024-09-11 20:42:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:42:45,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 20:42:45,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:45,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082368680] [2024-09-11 20:42:45,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:45,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655883779] [2024-09-11 20:42:45,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655883779] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:42:45,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:42:45,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2024-09-11 20:42:45,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240025052] [2024-09-11 20:42:45,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:45,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:42:45,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:42:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:42:45,771 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:42:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:46,744 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2024-09-11 20:42:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 20:42:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2024-09-11 20:42:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:46,746 INFO L225 Difference]: With dead ends: 73 [2024-09-11 20:42:46,747 INFO L226 Difference]: Without dead ends: 71 [2024-09-11 20:42:46,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:42:46,751 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:46,751 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 177 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 20:42:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-11 20:42:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2024-09-11 20:42:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 10 states have call successors, (10), 8 states have call predecessors, (10), 11 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-11 20:42:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2024-09-11 20:42:46,784 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 28 [2024-09-11 20:42:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:46,787 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2024-09-11 20:42:46,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:42:46,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2024-09-11 20:42:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-11 20:42:46,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:46,789 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:46,802 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 20:42:46,989 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:46,990 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:46,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:46,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2114078499, now seen corresponding path program 1 times [2024-09-11 20:42:46,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:46,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341155849] [2024-09-11 20:42:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:46,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:47,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427398938] [2024-09-11 20:42:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:47,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:47,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:47,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:42:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:42:47,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-11 20:42:47,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:47,173 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 [2024-09-11 20:42:47,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:42:47,183 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 [2024-09-11 20:42:47,424 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 [2024-09-11 20:42:47,602 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 [2024-09-11 20:42:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:42:47,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:48,539 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 53 treesize of output 37 [2024-09-11 20:42:48,552 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 37 treesize of output 33 [2024-09-11 20:42:52,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341155849] [2024-09-11 20:42:52,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427398938] [2024-09-11 20:42:52,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427398938] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:42:52,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:42:52,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-11 20:42:52,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561630830] [2024-09-11 20:42:52,991 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:52,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 20:42:52,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 20:42:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:42:52,993 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2024-09-11 20:42:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:53,502 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2024-09-11 20:42:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:42:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 [2024-09-11 20:42:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:53,507 INFO L225 Difference]: With dead ends: 70 [2024-09-11 20:42:53,510 INFO L226 Difference]: Without dead ends: 68 [2024-09-11 20:42:53,511 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:42:53,512 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:53,512 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 47 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:42:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-11 20:42:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-11 20:42:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 46 states have internal predecessors, (47), 11 states have call successors, (11), 9 states have call predecessors, (11), 12 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-11 20:42:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-09-11 20:42:53,542 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 30 [2024-09-11 20:42:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:53,543 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-09-11 20:42:53,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2024-09-11 20:42:53,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-09-11 20:42:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 20:42:53,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:53,547 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:53,561 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 20:42:53,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:53,748 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:53,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:53,749 INFO L85 PathProgramCache]: Analyzing trace with hash -525408077, now seen corresponding path program 1 times [2024-09-11 20:42:53,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:53,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423397201] [2024-09-11 20:42:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:53,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:53,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183611506] [2024-09-11 20:42:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:53,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:53,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:53,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:53,786 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:42:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:42:53,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-09-11 20:42:53,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:53,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:42:53,924 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 [2024-09-11 20:42:53,928 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 [2024-09-11 20:42:53,933 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 [2024-09-11 20:42:54,236 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 [2024-09-11 20:42:54,437 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 [2024-09-11 20:42:54,441 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 [2024-09-11 20:42:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:42:54,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:55,827 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 74 treesize of output 70 [2024-09-11 20:42:55,835 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 70 treesize of output 66 [2024-09-11 20:42:55,854 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 66 treesize of output 30 [2024-09-11 20:42:56,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423397201] [2024-09-11 20:42:56,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183611506] [2024-09-11 20:42:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183611506] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:42:56,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:42:56,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 20:42:56,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057067927] [2024-09-11 20:42:56,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:56,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 20:42:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:56,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 20:42:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:42:56,284 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:42:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:56,987 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2024-09-11 20:42:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:42:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2024-09-11 20:42:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:56,989 INFO L225 Difference]: With dead ends: 75 [2024-09-11 20:42:56,989 INFO L226 Difference]: Without dead ends: 57 [2024-09-11 20:42:56,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:42:56,990 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:56,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 306 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:42:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-11 20:42:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-11 20:42:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-11 20:42:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-09-11 20:42:57,010 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 36 [2024-09-11 20:42:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:57,010 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-09-11 20:42:57,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:42:57,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-09-11 20:42:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 20:42:57,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:57,012 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:57,030 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:42:57,212 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:57,213 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:57,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1208091455, now seen corresponding path program 2 times [2024-09-11 20:42:57,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:57,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450715853] [2024-09-11 20:42:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:57,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982993287] [2024-09-11 20:42:57,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:42:57,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:57,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:57,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:57,277 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:42:57,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:42:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:42:57,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-09-11 20:42:57,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:57,443 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 [2024-09-11 20:42:57,447 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 [2024-09-11 20:42:57,451 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 [2024-09-11 20:42:57,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:42:57,871 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 [2024-09-11 20:42:58,071 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 [2024-09-11 20:42:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 20:42:58,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:43:00,089 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 55 treesize of output 39 [2024-09-11 20:43:00,098 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 39 treesize of output 35 [2024-09-11 20:43:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:43:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450715853] [2024-09-11 20:43:00,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:43:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982993287] [2024-09-11 20:43:00,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982993287] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:43:00,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:43:00,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-11 20:43:00,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128841367] [2024-09-11 20:43:00,641 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:43:00,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 20:43:00,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:43:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 20:43:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:43:00,643 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:43:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:43:01,438 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-09-11 20:43:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:43:01,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2024-09-11 20:43:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:43:01,439 INFO L225 Difference]: With dead ends: 68 [2024-09-11 20:43:01,440 INFO L226 Difference]: Without dead ends: 66 [2024-09-11 20:43:01,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2024-09-11 20:43:01,441 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:43:01,441 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 67 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 20:43:01,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-11 20:43:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-09-11 20:43:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 44 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (19), 11 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-11 20:43:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-09-11 20:43:01,462 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 42 [2024-09-11 20:43:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:43:01,463 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-09-11 20:43:01,463 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:43:01,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-09-11 20:43:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:43:01,464 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:43:01,465 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:43:01,481 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:43:01,665 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:01,665 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:43:01,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash -870309937, now seen corresponding path program 2 times [2024-09-11 20:43:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:43:01,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498991903] [2024-09-11 20:43:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:43:01,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:43:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:43:01,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282638039] [2024-09-11 20:43:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:43:01,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:43:01,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:43:01,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:43:01,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:43:01,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:43:01,887 WARN L260 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-09-11 20:43:01,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:43:01,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:43:01,899 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 [2024-09-11 20:43:01,902 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 [2024-09-11 20:43:01,910 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 [2024-09-11 20:43:02,410 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 [2024-09-11 20:43:07,672 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 23 treesize of output 3 [2024-09-11 20:43:07,676 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 [2024-09-11 20:43:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 20:43:07,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:43:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:43:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498991903] [2024-09-11 20:43:13,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:43:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282638039] [2024-09-11 20:43:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282638039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:43:13,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:43:13,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 20:43:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818249936] [2024-09-11 20:43:13,645 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:43:13,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:43:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:43:13,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:43:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:43:13,647 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 21 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:43:17,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:43:21,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:43:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:43:23,910 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2024-09-11 20:43:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:43:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2024-09-11 20:43:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:43:23,911 INFO L225 Difference]: With dead ends: 73 [2024-09-11 20:43:23,911 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 20:43:23,912 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2024-09-11 20:43:23,912 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:43:23,913 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 437 Invalid, 4 Unknown, 0 Unchecked, 9.2s Time] [2024-09-11 20:43:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 20:43:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-11 20:43:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-11 20:43:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-09-11 20:43:23,940 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 48 [2024-09-11 20:43:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:43:23,941 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-09-11 20:43:23,941 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:43:23,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:23,941 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-09-11 20:43:23,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-11 20:43:23,942 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:43:23,943 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:43:23,957 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 20:43:24,143 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-09-11 20:43:24,143 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:43:24,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1965061851, now seen corresponding path program 3 times [2024-09-11 20:43:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:43:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916855654] [2024-09-11 20:43:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:43:24,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:43:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:43:24,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119806156] [2024-09-11 20:43:24,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:43:24,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:43:24,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:43:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:43:24,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:43:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:43:24,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 182 conjuncts are in the unsatisfiable core [2024-09-11 20:43:24,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:43:24,489 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 [2024-09-11 20:43:24,496 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 [2024-09-11 20:43:24,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:43:24,505 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 [2024-09-11 20:43:24,967 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 [2024-09-11 20:43:25,233 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 [2024-09-11 20:43:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-11 20:43:25,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:43:27,788 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 55 treesize of output 51 [2024-09-11 20:43:27,795 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 51 treesize of output 35 [2024-09-11 20:43:28,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:43:28,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916855654] [2024-09-11 20:43:28,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:43:28,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119806156] [2024-09-11 20:43:28,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119806156] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:43:28,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:43:28,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:43:28,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194816140] [2024-09-11 20:43:28,708 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:43:28,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:43:28,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:43:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:43:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2024-09-11 20:43:28,709 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:43:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:43:29,433 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-09-11 20:43:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:43:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2024-09-11 20:43:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:43:29,434 INFO L225 Difference]: With dead ends: 66 [2024-09-11 20:43:29,434 INFO L226 Difference]: Without dead ends: 64 [2024-09-11 20:43:29,435 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:43:29,435 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:43:29,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 90 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 20:43:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-11 20:43:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-11 20:43:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 11 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2024-09-11 20:43:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-09-11 20:43:29,460 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 54 [2024-09-11 20:43:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:43:29,461 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-09-11 20:43:29,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:43:29,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-09-11 20:43:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-11 20:43:29,462 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:43:29,462 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:43:29,473 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 20:43:29,663 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 20:43:29,663 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:43:29,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1567882761, now seen corresponding path program 4 times [2024-09-11 20:43:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:43:29,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730685039] [2024-09-11 20:43:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:43:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:43:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:43:29,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182989882] [2024-09-11 20:43:29,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:43:29,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:43:29,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:43:29,715 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:43:30,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:43:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:43:30,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 213 conjuncts are in the unsatisfiable core [2024-09-11 20:43:30,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:43:30,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:43:30,324 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 [2024-09-11 20:43:30,329 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 [2024-09-11 20:43:30,964 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 [2024-09-11 20:43:31,341 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 [2024-09-11 20:43:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-11 20:43:31,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:43:34,446 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 55 treesize of output 51 [2024-09-11 20:43:34,450 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 51 treesize of output 35 [2024-09-11 20:43:35,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:43:35,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730685039] [2024-09-11 20:43:35,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:43:35,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182989882] [2024-09-11 20:43:35,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182989882] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:43:35,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:43:35,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:43:35,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852771694] [2024-09-11 20:43:35,706 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:43:35,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:43:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:43:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:43:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2024-09-11 20:43:35,707 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:43:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:43:36,519 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2024-09-11 20:43:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:43:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 66 [2024-09-11 20:43:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:43:36,521 INFO L225 Difference]: With dead ends: 74 [2024-09-11 20:43:36,521 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 20:43:36,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:43:36,522 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:43:36,523 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 124 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 20:43:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 20:43:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2024-09-11 20:43:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (24), 12 states have call predecessors, (24), 10 states have call successors, (24) [2024-09-11 20:43:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2024-09-11 20:43:36,550 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 66 [2024-09-11 20:43:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:43:36,551 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2024-09-11 20:43:36,551 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:43:36,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2024-09-11 20:43:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-11 20:43:36,552 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:43:36,552 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:43:36,562 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:43:36,756 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:36,757 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:43:36,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:36,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1879374701, now seen corresponding path program 5 times [2024-09-11 20:43:36,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:43:36,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397076769] [2024-09-11 20:43:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:43:36,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:43:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:43:36,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953771692] [2024-09-11 20:43:36,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:43:36,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:43:36,840 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:43:36,841 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 20:43:37,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-11 20:43:37,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:43:37,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 222 conjuncts are in the unsatisfiable core [2024-09-11 20:43:37,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:43:37,426 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 [2024-09-11 20:43:37,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:43:37,435 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 [2024-09-11 20:43:37,892 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 [2024-09-11 20:43:38,020 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 [2024-09-11 20:43:38,362 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 [2024-09-11 20:43:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 32 proven. 58 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-09-11 20:43:38,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:43:42,661 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 55 treesize of output 39 [2024-09-11 20:43:42,667 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 39 treesize of output 35 [2024-09-11 20:43:44,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:43:44,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397076769] [2024-09-11 20:43:44,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:43:44,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953771692] [2024-09-11 20:43:44,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953771692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:43:44,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:43:44,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-11 20:43:44,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969855930] [2024-09-11 20:43:44,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:43:44,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:43:44,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:43:44,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:43:44,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:43:44,567 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:43:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:43:45,402 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-09-11 20:43:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:43:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 78 [2024-09-11 20:43:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:43:45,403 INFO L225 Difference]: With dead ends: 76 [2024-09-11 20:43:45,403 INFO L226 Difference]: Without dead ends: 74 [2024-09-11 20:43:45,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:43:45,405 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:43:45,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 152 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:43:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-11 20:43:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2024-09-11 20:43:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 12 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2024-09-11 20:43:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2024-09-11 20:43:45,428 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 78 [2024-09-11 20:43:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:43:45,428 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2024-09-11 20:43:45,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:43:45,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2024-09-11 20:43:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-11 20:43:45,429 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:43:45,430 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:43:45,445 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 20:43:45,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 20:43:45,630 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:43:45,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash -743936405, now seen corresponding path program 3 times [2024-09-11 20:43:45,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:43:45,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601490727] [2024-09-11 20:43:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:43:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:43:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:43:45,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584839889] [2024-09-11 20:43:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:43:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:43:45,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:43:45,683 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 20:43:46,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:43:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:43:46,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-09-11 20:43:46,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:43:46,195 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 [2024-09-11 20:43:46,200 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 [2024-09-11 20:43:47,461 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 [2024-09-11 20:43:47,464 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 [2024-09-11 20:43:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-11 20:43:47,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:44:04,504 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 60 treesize of output 56 [2024-09-11 20:44:04,511 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 56 treesize of output 20 [2024-09-11 20:44:11,005 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_50| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_50| Int)) (or (let ((.cse3 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse1 (+ (select .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset) 1))) (= (* (select (select (store |c_#memory_int#3| c_func_to_recursive_line_26_to_34_0_~x.base (let ((.cse0 (select |c_#memory_int#3| c_func_to_recursive_line_26_to_34_0_~x.base))) (store .cse0 c_func_to_recursive_line_26_to_34_0_~x.offset (+ (select .cse0 c_func_to_recursive_line_26_to_34_0_~x.offset) (* .cse1 .cse1 .cse1))))) |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_18|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_24|) 4) (let ((.cse2 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset .cse1)) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_50|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_50|))) (+ (* (* .cse2 .cse2 .cse2) 2) (* .cse2 .cse2) (* .cse2 .cse2 .cse2 .cse2)))))) (not (let ((.cse5 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse9 (select .cse5 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse6 (+ 2 .cse9))) (= (let ((.cse4 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse5 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| .cse6)) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_50|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_50|))) (+ (* .cse4 .cse4) (* .cse4 .cse4 .cse4 .cse4) (* 2 (* .cse4 .cse4 .cse4)))) (* (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_26_to_34_0_#in~x.base| (let ((.cse7 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_26_to_34_0_#in~x.base|))) (store .cse7 |c_func_to_recursive_line_26_to_34_0_#in~x.offset| (+ (* .cse6 .cse6 .cse6) (let ((.cse8 (+ .cse9 1))) (* .cse8 .cse8 .cse8)) (select .cse7 |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))))) |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_18|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_24|) 4)))))))) is different from false [2024-09-11 20:44:11,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:44:11,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601490727] [2024-09-11 20:44:11,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:44:11,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584839889] [2024-09-11 20:44:11,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584839889] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:44:11,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:44:11,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-11 20:44:11,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129226005] [2024-09-11 20:44:11,013 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:44:11,013 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 20:44:11,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:44:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 20:44:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=442, Unknown=2, NotChecked=42, Total=552 [2024-09-11 20:44:11,014 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 17 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:44:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:44:11,848 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2024-09-11 20:44:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:44:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-09-11 20:44:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:44:11,850 INFO L225 Difference]: With dead ends: 81 [2024-09-11 20:44:11,850 INFO L226 Difference]: Without dead ends: 67 [2024-09-11 20:44:11,850 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=128, Invalid=804, Unknown=2, NotChecked=58, Total=992 [2024-09-11 20:44:11,851 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:44:11,851 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 337 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:44:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-11 20:44:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-11 20:44:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 12 states have return successors, (25), 13 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-11 20:44:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-09-11 20:44:11,868 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 60 [2024-09-11 20:44:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:44:11,868 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-09-11 20:44:11,868 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 16 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:44:11,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:44:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-09-11 20:44:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-11 20:44:11,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:44:11,869 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:44:11,884 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 20:44:12,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:44:12,070 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:44:12,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:44:12,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1381245265, now seen corresponding path program 6 times [2024-09-11 20:44:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:44:12,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42612446] [2024-09-11 20:44:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:44:12,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:44:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:44:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988919385] [2024-09-11 20:44:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:44:12,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:44:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:44:12,147 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:44:12,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 20:44:12,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-11 20:44:12,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:44:12,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 283 conjuncts are in the unsatisfiable core [2024-09-11 20:44:12,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:44:12,961 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 [2024-09-11 20:44:12,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:44:12,970 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 [2024-09-11 20:44:13,684 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 [2024-09-11 20:44:14,096 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 [2024-09-11 20:44:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 31 proven. 92 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-09-11 20:44:14,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:44:18,769 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 55 treesize of output 39 [2024-09-11 20:44:18,774 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 39 treesize of output 35 [2024-09-11 20:44:20,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:44:20,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42612446] [2024-09-11 20:44:20,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:44:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988919385] [2024-09-11 20:44:20,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988919385] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:44:20,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:44:20,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-11 20:44:20,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658986249] [2024-09-11 20:44:20,788 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:44:20,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 20:44:20,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:44:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 20:44:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2024-09-11 20:44:20,789 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 24 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-11 20:44:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:44:21,827 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2024-09-11 20:44:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 20:44:21,828 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) Word has length 90 [2024-09-11 20:44:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:44:21,829 INFO L225 Difference]: With dead ends: 78 [2024-09-11 20:44:21,829 INFO L226 Difference]: Without dead ends: 76 [2024-09-11 20:44:21,829 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2024-09-11 20:44:21,830 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:44:21,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 166 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:44:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-11 20:44:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-09-11 20:44:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (29), 14 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-11 20:44:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2024-09-11 20:44:21,851 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 90 [2024-09-11 20:44:21,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:44:21,852 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2024-09-11 20:44:21,852 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-11 20:44:21,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:44:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2024-09-11 20:44:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-11 20:44:21,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:44:21,853 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:44:21,869 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-11 20:44:22,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 20:44:22,054 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:44:22,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:44:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash -802278265, now seen corresponding path program 4 times [2024-09-11 20:44:22,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:44:22,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706650403] [2024-09-11 20:44:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:44:22,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:44:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:44:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93214335] [2024-09-11 20:44:22,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:44:22,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:44:22,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:44:22,108 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:44:22,113 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 20:44:22,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:44:22,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:44:22,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 153 conjuncts are in the unsatisfiable core [2024-09-11 20:44:22,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:44:22,595 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 [2024-09-11 20:44:22,896 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 [2024-09-11 20:44:23,026 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 67 treesize of output 59 [2024-09-11 20:44:23,030 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 119 treesize of output 47 [2024-09-11 20:44:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 58 proven. 38 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-11 20:44:23,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:44:27,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:44:27,207 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 256 treesize of output 259 [2024-09-11 20:44:35,252 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse0 (select .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse1 (* .cse0 .cse0 .cse0 .cse0))) (or (and (= (+ 144 (* (div (+ (* .cse0 .cse0 73) (* 14 .cse0 .cse0 .cse0) .cse1) 4) 4) (* .cse0 168)) (let ((.cse2 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset (+ 3 .cse0))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* (* .cse2 .cse2 .cse2) 2) (* .cse2 .cse2 .cse2 .cse2) (* .cse2 .cse2)))) (= |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 (+ (* .cse0 .cse0) .cse1 (* 2 .cse0 .cse0 .cse0)) 4) 0)))))) is different from false [2024-09-11 20:44:47,323 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 20:44:51,328 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse1 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse0 (* .cse1 .cse1 .cse1 .cse1))) (and (or (= (mod (+ .cse0 (* 2 .cse1 .cse1 .cse1) (* .cse1 .cse1)) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_44| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (= (let ((.cse2 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse2 .cse2) (* 2 (* .cse2 .cse2 .cse2)) (* .cse2 .cse2 .cse2 .cse2))) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_28|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_44|) 4)))) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (or (not (= (+ (* .cse1 168) 144 (* (div (+ .cse0 (* 14 .cse1 .cse1 .cse1) (* .cse1 .cse1 73)) 4) 4)) (let ((.cse3 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |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_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* 2 (* .cse3 .cse3 .cse3)) (* .cse3 .cse3 .cse3 .cse3) (* .cse3 .cse3))))) (= (let ((.cse5 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse5 .cse5) (* 2 (* .cse5 .cse5 .cse5)) (* .cse5 .cse5 .cse5 .cse5))) (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4)))))))) is different from false [2024-09-11 20:44:55,332 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse1 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse0 (* .cse1 .cse1 .cse1 .cse1))) (and (or (= (mod (+ .cse0 (* 2 .cse1 .cse1 .cse1) (* .cse1 .cse1)) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_44| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (= (let ((.cse2 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse2 .cse2) (* 2 (* .cse2 .cse2 .cse2)) (* .cse2 .cse2 .cse2 .cse2))) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_28|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_44|) 4)))) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73| Int)) (or (not (= (+ (* .cse1 168) 144 (* (div (+ .cse0 (* 14 .cse1 .cse1 .cse1) (* .cse1 .cse1 73)) 4) 4)) (let ((.cse3 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |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_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* 2 (* .cse3 .cse3 .cse3)) (* .cse3 .cse3 .cse3 .cse3) (* .cse3 .cse3))))) (= (let ((.cse5 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_73|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_73|))) (+ (* .cse5 .cse5) (* 2 (* .cse5 .cse5 .cse5)) (* .cse5 .cse5 .cse5 .cse5))) (* (select (select |c_#memory_int#3| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 4)))))))) is different from true [2024-09-11 20:45:07,355 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)